Method, device, equipment and medium for determining operating conditions of power generation system

Abstract

The present application discloses a method, device, equipment and medium for determining the operating conditions of a power generation system belonging to the field of power generation technology. The power generation system includes two energy storage systems. In this method, system parameters of the power generation system and an automatic generation control (AGC) instruction are obtained, adjustment parameters are determined by using the system parameters and the target load, and the target operating conditions of the power generation system are determined according to one or more of the positive and negative of the parameters included in the adjustment parameters and the magnitude relationship between the parameters. In this way, the target operating conditions of the power generation system can be determined by using the system parameters of the power generation system and the AGC instruction, and the target operating conditions can reflect the current operating state of the power generation system. Furthermore, it helps to determine the power adjustment methods of the two energy storage systems for the target operating conditions, effectively decompose the AGC instruction, improve the coordination between the two energy storage systems and the operation of the thermal power unit, increase the adjustment speed of adjusting the power of the power generation system, and meet the power generation demand.

Description

Technical Field

[0001] This application relates to the field of power generation technologies, and particularly to a method, device, equipment, and medium for determining the operating conditions of a power generation system. Background Art

[0002] With the development of power generation technologies, in order to improve the flexibility of power generation of thermal power units and the full utilization of energy, an energy storage system is added on the basis of traditional thermal power units to form a power generation system including a thermal power unit and an energy storage system. The energy storage system can operate in coordination with the thermal power unit to adjust the power generation power of the thermal power unit. For example, the power generation power of the thermal power unit can be supplemented and extracted to achieve faster adjustment of the overall power of the power generation system.

[0003] During the operation of the power generation system, the power needs to be adjusted according to the load. The power that the power generation system needs to provide is determined by the load indicated by the Automatic Generation Control (AGC) instruction. The power of the power generation system needs to be close to the load indicated by the AGC instruction to meet the power consumption demand. For a power generation system in which an energy storage system and a thermal power unit operate in coordination, after obtaining the AGC instruction, the power of the energy storage system and the power of the thermal power unit need to be adjusted respectively to make the overall power of the power generation system close to the load indicated by the AGC instruction. Currently, for a power generation system including multiple energy storage systems, such as a power generation system including two energy storage systems, it is difficult to select a more appropriate adjustment method for the multiple energy storage systems and the thermal power unit, resulting in a slow speed of adjusting the overall power of the power generation system and unable to meet the power generation demand. Summary of the Invention

[0004] In view of this, this application provides a method, device, equipment, and medium for determining the operating conditions of a power generation system, which can determine the operating conditions of a power generation system including two energy storage systems, and further facilitate adjusting the power of the energy storage system based on the operating conditions.

[0005] To solve the above problems, the technical solutions provided by this application are as follows:

[0006] In a first aspect, this application provides a method for determining the operating conditions of a power generation system. The power generation system includes a thermal power unit and two energy storage systems. The two energy storage systems include an exothermic energy storage system and an endothermic energy storage system. The method includes:

[0007] Obtain the system parameters of the power generation system and the Automatic Generation Control (AGC) instruction. The system parameters include the total power generation of the power generation system, the power generation power of the thermal power unit, the power adjustment rate of the power generation system, and the power adjustment rate of the thermal power unit. The AGC instruction is used to indicate the target load to which the total power of the power generation system needs to be adjusted;

[0008] Determine adjustment parameters by using the system parameters and the target load, where the adjustment parameters include the power adjustment difference of the power generation system, the power adjustment difference of the thermal power unit, the power adjustment duration of the power generation system, and the power adjustment duration of the thermal power unit;

[0009] Determine a target operating condition from preset candidate operating conditions according to one or more of the positive and negative of the parameters included in the adjustment parameters and the magnitude relationship between the parameters. The target operating condition is used to indicate achieving the total power generation of the power generation system to reach the target load and the power adjustment methods for the two energy storage systems.

[0010] In a possible implementation manner, the determining a target operating condition from preset candidate operating conditions according to one or more of the positive and negative of the parameters included in the adjustment parameters and the magnitude relationship between the parameters includes:

[0011] Determine the candidate operating condition corresponding to the condition determination condition satisfied by the adjustment parameters as the target operating condition, where the condition determination condition corresponding to the candidate operating condition includes one or more of the preset positive and negative of the parameters included in the adjustment parameters and the magnitude relationship between the parameters.

[0012] In a possible implementation manner, the candidate operating conditions include a normal operating condition; in the normal operating condition, during the process of the total power generation of the power generation system reaching the target load, the operating parameters of the energy storage system are within the parameter range of the energy storage system;

[0013] The determining a target operating condition from preset candidate operating conditions according to one or more of the positive and negative of the parameters included in the adjustment parameters and the magnitude relationship between the parameters includes:

[0014] If the power adjustment difference of the power generation system is 0, determine that the target operating condition is the first condition, and the first condition is used to indicate selecting one of the two energy storage systems to adjust the power or not adjusting the power according to the power adjustment difference of the thermal power unit;

[0015] If the power adjustment difference of the power generation system is equal to the power adjustment difference of the thermal power unit, determine that the target operating condition is the second condition. The second condition includes the target load being in the rising stage and the falling stage, and the second condition is used to indicate calling the exothermic energy storage system to adjust the power in the rising stage and calling the endothermic energy storage system to adjust the power in the falling stage;

[0016] If the power adjustment difference of the power generation system and the power adjustment difference of the thermal power unit have the same sign (both positive or both negative), and the power adjustment duration of the thermal power unit is greater than or equal to the power adjustment duration of the power generation system, then determine the size relationship between the power adjustment difference of the power generation system and 0;

[0017] If the power adjustment difference of the power generation system is greater than 0, determine that the target operating condition is a load increasing condition, where the load increasing condition is a condition in which the target load is in an increasing stage, and the load increasing condition is used to indicate at least invoking the exothermic energy storage system to adjust the power;

[0018] If the power adjustment difference of the power generation system is less than 0, determine that the target operating condition is a load decreasing condition, where the load decreasing condition is a condition in which the target load is in a decreasing stage, and the load decreasing condition is used to indicate at least invoking the endothermic energy storage system to adjust the power.

[0019] In a possible implementation, the determining that the target operating condition is a load increasing condition includes:

[0020] If the power adjustment difference of the thermal power unit is greater than the power adjustment difference of the power generation system, determine that the target operating condition is a third condition, and the third condition is used to indicate invoking the exothermic energy storage system to adjust the power;

[0021] If the power adjustment difference of the thermal power unit is less than the power adjustment difference of the power generation system, determine that the target operating condition is a fourth condition, and the fourth condition is used to indicate invoking the endothermic energy storage system and the exothermic energy storage system to adjust the power in sequence;

[0022] In a possible implementation, the determining that the target operating condition is a load decreasing condition includes:

[0023] If the power adjustment difference of the thermal power unit is greater than the power adjustment difference of the power generation system, determine that the target operating condition is a fifth condition, and the fifth condition is used to indicate invoking the exothermic energy storage system and the endothermic energy storage system to adjust the power in sequence;

[0024] If the power adjustment difference of the thermal power unit is less than the power adjustment difference of the power generation system, determine that the target operating condition is a sixth condition, and the sixth condition is used to indicate invoking the endothermic energy storage system to adjust the power.

[0025] In a possible implementation, the candidate operating conditions include special operating conditions; in the special operating conditions, during the process of the total power generation of the power generation system reaching the target load, the probability that the operating parameters of the energy storage system exceed the parameter range of the energy storage system is greater than the probability threshold;

[0026] Determining a target operating condition from a preset set of candidate operating conditions based on one or more of the positive / negative signs of the parameters included in the adjustment parameters and the magnitude relationships between the parameters includes:

[0027] If the sign of the power adjustment difference of the power generation system is different from the sign of the power adjustment difference of the thermal power unit, determine the magnitude relationship between the power adjustment difference of the power generation system and 0;

[0028] If the power adjustment difference of the power generation system is greater than 0, determine that the target operating condition is the seventh condition, where the seventh condition is the condition during the target load increase phase, and the seventh condition is used to indicate calling the endothermic energy storage system to adjust the power;

[0029] If the power adjustment difference of the power generation system is less than 0, determine that the target operating condition is the eighth condition, where the eighth condition is the condition during the target load decrease phase, and the eighth condition is used to indicate calling the exothermic energy storage system to adjust the power;

[0030] If the sign of the power adjustment difference of the power generation system is the same as the sign of the power adjustment difference of the thermal power unit, and the power adjustment duration of the thermal power unit is less than the power adjustment duration of the power generation system, determine the magnitude relationship between the power adjustment difference of the power generation system and 0;

[0031] If the power adjustment difference of the power generation system is greater than 0, determine that the target operating condition is the ninth condition, where the ninth condition is the condition during the target load increase phase, and the ninth condition is used to indicate calling the endothermic energy storage system to adjust the power;

[0032] If the power adjustment difference of the power generation system is less than 0, determine that the target operating condition is the tenth condition, where the tenth condition is the condition during the target load decrease phase, and the tenth condition is used to indicate calling the exothermic energy storage system to adjust the power.

[0033] In one possible implementation, the method further includes:

[0034] Obtain the maximum power of the two energy storage systems respectively;

[0035] If it is determined that there is a power limit anomaly using the adjustment parameters and the maximum power of the two energy storage systems, output a power limit anomaly reminder message.

[0036] In one possible implementation, determining that there is a power limit anomaly using the adjustment parameters and the maximum power of the two energy storage systems includes:

[0037] If the power adjustment duration of the thermal power unit is greater than or equal to the power adjustment duration of the power generation system, calculate the product of the power adjustment difference of the power generation system and the first ratio to obtain a first product, and calculate the difference between the power adjustment of the thermal power unit and the first product to obtain the target power; the first ratio is the ratio of the power adjustment rate of the thermal power unit to the power adjustment rate of the power generation system;

[0038] If the power adjustment duration of the thermal power unit is less than the power adjustment duration of the power generation system, calculate the product of the power adjustment difference of the thermal power unit and the second ratio to obtain a second product, and calculate the difference between the second product and the power adjustment difference of the power generation system to obtain the target power; the second ratio is the ratio of the power adjustment rate of the power generation system to the power adjustment rate of the thermal power unit;

[0039] Determine that the target power is not within the power range, and the extreme values of the power range are the maximum powers of the two energy storage systems.

[0040] In a possible implementation manner, the target operating condition is a special operating condition. Under the special operating condition, during the process that the total power generation of the power generation system reaches the target load, the probability that the operating parameters of the energy storage system exceed the parameter range of the energy storage system is greater than the probability threshold. The method further includes:

[0041] Output a rate-limited abnormal reminder message.

[0042] In a possible implementation manner, the method further includes:

[0043] Use the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit to determine the energy required to execute the AGC instruction this time;

[0044] If it is determined that the energy is not within the energy range, determine that there is a capacity limit abnormality, and output a capacity limit abnormality reminder message.

[0045] In a possible implementation manner, the target operating condition indicates to call the thermal energy storage system and the endothermic energy storage system. Using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit to determine the energy required to execute the AGC instruction this time includes:

[0046] Calculate the first energy of the exothermic energy storage system and the second energy of the endothermic energy storage system respectively by using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit;

[0047] Said determining that the energy is not within the energy range includes:

[0048] Determine that the first energy is not within the energy range of the exothermic energy storage system, or the second energy is not within the energy range of the endothermic energy storage system.

[0049] In a possible implementation manner, the target operating condition instructs to call the thermal energy storage system or the endothermic energy storage system. Using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit to determine the energy required for this execution of the AGC instruction includes:

[0050] Calculate the third energy by using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit. The third energy is the energy of the energy storage system instructed to be called by the target operating condition;

[0051] Said determining that the energy is not within the energy range includes:

[0052] Determine that the third energy is not within the energy range of the energy storage system instructed to be called by the target operating condition.

[0053] In a second aspect, the present application provides a device for determining the operating condition of a power generation system. The power generation system includes a thermal power unit and two energy storage systems. The two energy storage systems include an exothermic energy storage system and an endothermic energy storage system. The device includes:

[0054] A first acquisition unit, configured to acquire system parameters of the power generation system and an automatic generation control (AGC) instruction. The system parameters include the total power generation of the power generation system, the power generation of the thermal power unit, the power adjustment rate of the power generation system, and the power adjustment rate of the thermal power unit. The AGC instruction is used to indicate the target load to which the total power of the power generation system needs to be adjusted;

[0055] An adjustment parameter determination unit, configured to determine adjustment parameters by using the system parameters and the target load. The adjustment parameters include the power adjustment difference of the power generation system, the power adjustment difference of the thermal power unit, the power adjustment duration of the power generation system, and the power adjustment duration of the thermal power unit;

[0056] An operating condition determination unit is configured to determine a target operating condition from a preset set of candidate operating conditions based on one or more of the positive or negative values of the parameters included in the adjustment parameters and the magnitude relationships between the parameters. The target operating condition is used to indicate achieving the total power generation of the power generation system reaching the target load, and the power adjustment method for the two energy storage systems.

[0057] In a possible implementation manner, the operating condition determination unit is specifically configured to determine, as the target operating condition, the candidate operating condition corresponding to the operating condition determination condition satisfied by the adjustment parameters. The operating condition determination conditions corresponding to the candidate operating conditions include one or more of the preset positive or negative values of the parameters included in the adjustment parameters and the magnitude relationships between the parameters.

[0058] In a possible implementation manner, the candidate operating conditions include a normal operating condition; in the normal operating condition, during the process of the total power generation of the power generation system reaching the target load, the operating parameters of the energy storage system are within the parameter range of the energy storage system;

[0059] The operating condition determination unit is specifically configured to:

[0060] If the power adjustment difference of the power generation system is 0, determine that the target operating condition is the first operating condition, and the first operating condition is used to indicate selecting one of the two energy storage systems to adjust the power according to the power adjustment difference of the thermal power unit, or not adjusting the power;

[0061] If the power adjustment difference of the power generation system is equal to the power adjustment difference of the thermal power unit, determine that the target operating condition is the second operating condition. The second operating condition includes the target load being in the rising stage and the falling stage. The second operating condition is used to indicate calling the exothermic energy storage system to adjust the power in the rising stage and calling the endothermic energy storage system to adjust the power in the falling stage;

[0062] If the power adjustment differences of the power generation system and the thermal power unit have the same sign (both positive or both negative), and the power adjustment duration of the thermal power unit is greater than or equal to the power adjustment duration of the power generation system, determine the magnitude relationship between the power adjustment difference of the power generation system and 0;

[0063] If the power adjustment difference of the power generation system is greater than 0, determine that the target operating condition is a load rising condition. The load rising condition is a condition where the target load is in the rising stage, and the load rising condition is used to indicate calling at least the exothermic energy storage system to adjust the power;

[0064] If the power adjustment difference of the power generation system is less than 0, determine that the target operating condition is a load decrease condition, where the load decrease condition is a condition in which the target load is in a decreasing stage, and the load decrease condition is used to indicate that at least the endothermic energy storage system is called to adjust the power.

[0065] In a possible implementation, the operating condition determination unit for determining that the target operating condition is a load increase condition includes:

[0066] The operating condition determination unit is specifically configured to:

[0067] If the power adjustment difference of the thermal power unit is greater than the power adjustment difference of the power generation system, determine that the target operating condition is the third condition, and the third condition is used to indicate that the exothermic energy storage system is called to adjust the power; if the power adjustment difference of the thermal power unit is less than the power adjustment difference of the power generation system, determine that the target operating condition is the fourth condition, and the fourth condition is used to indicate that the endothermic energy storage system and the exothermic energy storage system are called to adjust the power in sequence;

[0068] In a possible implementation, the operating condition determination unit for determining that the target operating condition is a load decrease condition includes:

[0069] The operating condition determination unit is configured to, if the power adjustment difference of the thermal power unit is greater than the power adjustment difference of the power generation system, determine that the target operating condition is the fifth condition, and the fifth condition is used to indicate that the exothermic energy storage system and the endothermic energy storage system are called to adjust the power in sequence; if the power adjustment difference of the thermal power unit is less than the power adjustment difference of the power generation system, determine that the target operating condition is the sixth condition, and the sixth condition is used to indicate that the endothermic energy storage system is called to adjust the power.

[0070] In a possible implementation, the candidate operating conditions include special operating conditions; in the special operating conditions, during the process of the total power generation of the power generation system reaching the target load, the probability that the operating parameters of the energy storage system exceed the parameter range of the energy storage system is greater than the probability threshold;

[0071] The operating condition determination unit is specifically configured to:

[0072] If the power adjustment difference of the power generation system and the power adjustment difference of the thermal power unit have different signs, determine the magnitude relationship between the power adjustment difference of the power generation system and 0;

[0073] If the power adjustment difference of the power generation system is greater than 0, determine that the target operating condition is the seventh condition, where the seventh condition is a condition in the rising stage of the target load, and the seventh condition is used to indicate that the endothermic energy storage system is called to adjust the power;

[0074] If the power adjustment difference of the power generation system is less than 0, determine that the target operating condition is the eighth condition. The eighth condition is the condition in the target load decrease stage, and the eighth condition is used to indicate calling the exothermic energy storage system to adjust the power;

[0075] If the power adjustment difference of the power generation system and the power adjustment difference of the thermal power unit have the same sign (positive or negative), and the power adjustment duration of the thermal power unit is less than the power adjustment duration of the power generation system, judge the size relationship between the power adjustment difference of the power generation system and 0;

[0076] If the power adjustment difference of the power generation system is greater than 0, determine that the target operating condition is the ninth condition. The ninth condition is the condition in the target load increase stage, and the ninth condition is used to indicate calling the endothermic energy storage system to adjust the power;

[0077] If the power adjustment difference of the power generation system is less than 0, determine that the target operating condition is the tenth condition. The tenth condition is the condition in the target load decrease stage, and the tenth condition is used to indicate calling the exothermic energy storage system to adjust the power.

[0078] In a possible implementation manner, the device further includes:

[0079] A second acquisition unit, configured to respectively acquire the maximum powers of the two energy storage systems;

[0080] A first abnormality determination unit, configured to output a power limit abnormality reminder message if it is determined that there is a power limit abnormality by using the adjustment parameter and the maximum powers of the two energy storage systems.

[0081] In a possible implementation manner, the first abnormality determination unit is configured to determine that there is a power limit abnormality by using the adjustment parameter and the maximum powers of the two energy storage systems, including:

[0082] The first abnormality determination unit is configured to:

[0083] If the power adjustment duration of the thermal power unit is greater than or equal to the power adjustment duration of the power generation system, calculate the product of the power adjustment difference of the power generation system and a first ratio to obtain a first product, and calculate the difference between the power adjustment of the thermal power unit and the first product to obtain a target power; the first ratio is the ratio of the power adjustment rate of the thermal power unit to the power adjustment rate of the power generation system;

[0084] If the power adjustment duration of the thermal power unit is less than that of the power generation system, calculate the product of the power adjustment difference of the thermal power unit and the second ratio to obtain a second product, and calculate the difference between the second product and the power adjustment difference of the power generation system to obtain the target power; the second ratio is the ratio of the power adjustment rate of the power generation system to the power adjustment rate of the thermal power unit.

[0085] Determine that the target power is not within the power range, and the extreme values of the power range are the maximum powers of the two energy storage systems.

[0086] In a possible implementation manner, the target operating condition is a special operating condition. Under the special operating condition, during the process that the total power generation of the power generation system reaches the target load, the probability that the operating parameters of the energy storage system exceed the parameter range of the energy storage system is greater than the probability threshold. The device further includes:

[0087] A second abnormal determination unit, configured to output a rate-limited abnormal reminder message.

[0088] In a possible implementation manner, the device further includes:

[0089] An energy determination unit, configured to use the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit to determine the energy required for this execution of the AGC instruction.

[0090] A third abnormal determination unit, configured to determine that there is a capacity-limited abnormality and output a capacity-limited abnormal reminder message if it is determined that the energy is not within the energy range.

[0091] In a possible implementation manner, the target operating condition indicates to call the thermal energy storage system and the endothermic energy storage system. The energy determination unit is specifically configured to use the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit to calculate the first energy of the exothermic energy storage system and the second energy of the endothermic energy storage system respectively.

[0092] The third abnormal determination unit is configured to determine that the energy is not within the energy range, including:

[0093] The third abnormal determination unit is configured to determine that the first energy is not within the energy range of the exothermic energy storage system, or the second energy is not within the energy range of the endothermic energy storage system.

[0094] In a possible implementation, the target operating condition indication calls the thermal energy storage system or the endothermic energy storage system. The energy determination unit is specifically configured to calculate a third energy by using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit. The third energy is the energy of the energy storage system called by the target operating condition indication.

[0095] The third anomaly determination unit is configured to determine that the third energy is not within the energy range of the energy storage system called by the target operating condition indication.

[0096] In a third aspect, the present application provides a device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the method for determining the operating condition of the power generation system as described in any one of the first aspects is implemented.

[0097] In a fourth aspect, the present application provides a computer-readable storage medium. Instructions are stored in the computer-readable storage medium. When the instructions are run on a terminal device, the terminal device is caused to execute the method for determining the operating condition of the power generation system as described in any one of the first aspects.

[0098] Therefore, the present application has the following beneficial effects:

[0099] The present application provides a method, device, equipment, and medium for determining the operating condition of a power generation system. The power generation system includes two energy storage systems. In this method, system parameters of the power generation system and an automatic generation control (AGC) instruction are obtained, adjustment parameters are determined by using the system parameters and the target load, and the target operating condition of the power generation system is determined according to one or more of the positive and negative of the parameters included in the adjustment parameters and the magnitude relationship between the parameters. The target operating condition is used to indicate the power adjustment method for achieving the total power generation of the power generation system to reach the target load indicated by the AGC instruction for the two energy storage systems. In this way, the target operating condition of the power generation system can be determined by using the system parameters of the power generation system and the AGC instruction. The target operating condition can reflect the current operating state of the power generation system, and thus helps to determine the power adjustment methods for the two energy storage systems according to the target operating condition, effectively decompose the AGC instruction, improve the coordination between the two energy storage systems and the operation of the thermal power unit, increase the adjustment speed of adjusting the power of the power generation system, meet the power generation demand, and be beneficial to the safety, economy, and stability of the operation of the power generation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0100] Figure 1 It is a schematic flowchart of a method for determining the operating condition of a power generation system provided by an embodiment of the present application;

[0101] Figure 2 Schematic diagram of the power curve of the basic working scenario of the energy storage system provided by the embodiment of the present application;

[0102] Figure 3 Schematic diagram of the operation process of working condition 1 provided by the embodiment of the present application;

[0103] Figure 4 Schematic diagram of the operation process of working condition 2 provided by the embodiment of the present application;

[0104] Figure 5 Schematic diagram of the operation process of working condition 3 provided by the embodiment of the present application;

[0105] Figure 6 Schematic diagram of the operation process of working condition 4 provided by the embodiment of the present application;

[0106] Figure 7 Schematic diagram of the operation process of working condition 5 provided by the embodiment of the present application;

[0107] Figure 8a Schematic diagram of the operation process of the first sub - working condition of working condition 6 provided by the embodiment of the present application;

[0108] Figure 8b Schematic diagram of the operation process of the second sub - working condition of working condition 6 provided by the embodiment of the present application;

[0109] Figure 8c Schematic diagram of the operation process of the third sub - working condition of working condition 6 provided by the embodiment of the present application;

[0110] Figure 9 Schematic diagram of the operation process of working condition 7 provided by the embodiment of the present application;

[0111] Figure 10 Schematic diagram of the operation process of working condition 8 provided by the embodiment of the present application;

[0112] Figure 11 Schematic diagram of the operation process of working condition 9 provided by the embodiment of the present application;

[0113] Figure 12 Schematic diagram of the operation process of working condition 10 provided by the embodiment of the present application;

[0114] Figure 13 Schematic diagram of the structure of a working condition determination device applied to a power generation system provided by the embodiment of the present application. Detailed implementation manners

[0115] To facilitate the understanding and interpretation of the technical solutions provided by the embodiments of the present application, the background technology of the present application will be described first.

[0116] With the rapid development of new energy power technologies, an increasing number of new energy power generation systems are integrated into the power transmission network. New energy power generation systems are characterized by intermittency, volatility, and randomness. In the operation scenario including new energy power generation systems, in order to ensure the safety and stability of power grid operation, thermal power units need to achieve higher power generation flexibility and lower operating loads to ensure the safety and stability of power grid operation and achieve the backup power supply for power generation.

[0117] Currently, in order to enhance the power generation flexibility of thermal power units, an energy storage system is added to the thermal power unit, and the thermal power unit and the energy storage system operate jointly. The energy storage system can supplement and extract the power of the thermal power unit to achieve a faster adjustment of the overall power of the power generation system. Under normal circumstances, when the thermal power unit needs to increase or decrease power, that is, increase or decrease the load, the energy storage system and the thermal power unit jointly complete the goal of increasing or decreasing power. Among them, the process of adjusting power can also be called the process of variable load.

[0118] As an example, the thermal power unit is a coal-fired unit, and the energy storage system is a molten salt system and a condensate heat storage system. The molten salt system supplements the power generation of the thermal power unit, and the condensate heat storage system extracts the power generation of the coal-fired unit. The power generation system including the coal-fired unit, the molten salt system, and the condensate heat storage system can also be called a boiler-turbine-energy storage thermal power unit.

[0119] During the process of adjusting the power generation of the power generation system, it is necessary to adjust the overall power of the power generation system to be close to or equal to the load included in the AGC command to meet the power demand. During the process of adjusting the power generation system according to the load included in the AGC command, it is necessary to decompose the AGC command, determine the power of the thermal power unit and the power of the energy storage system respectively, and adjust the operation of the thermal power unit and the energy storage system.

[0120] To achieve the coordinated control of the thermal power unit and the energy storage system included in the power generation system, it is necessary to judge the state of the energy storage system to ensure the stable operation of the power generation system. However, the operation of a power generation system including multiple energy storage systems is relatively complex, and there are many possible operating conditions. Currently, the decomposition scheme for the AGC command mainly targets power generation systems including a single energy storage system and cannot handle power generation systems including multiple energy storage systems. For a power generation system including multiple energy storage systems, it is difficult to select a more appropriate adjustment method for multiple energy storage systems and thermal power units, resulting in a slower speed of adjusting the overall power of the power generation system and unable to meet the power generation demand.

[0121] Based on this, an embodiment of the present application provides a method for determining the operating condition of a power generation system. This method is applicable to a power generation system including two energy storage systems. In this method, system parameters of the power generation system and an automatic generation control (AGC) instruction are obtained, and adjustment parameters are determined by using the system parameters and the target load. According to one or more of the positive / negative of the parameters included in the adjustment parameters and the magnitude relationship between the parameters, the target operating condition of the power generation system is determined. The target operating condition is used to indicate achieving the total power generation of the power generation system to reach the target load indicated by the AGC instruction and the power adjustment method for the two energy storage systems. In this way, the target operating condition of the power generation system can be determined by using the system parameters of the power generation system and the AGC instruction. The target operating condition can reflect the current operating state of the power generation system, and thus helps to determine the power adjustment method for the two energy storage systems according to the target operating condition, effectively decompose the AGC instruction, improve the coordination between the two energy storage systems and the operation of the thermal power unit, increase the adjustment speed of adjusting the power of the power generation system, meet the power generation demand, and is beneficial to the safety, economy and stability of the operation of the power generation system.

[0122] To facilitate understanding of the technical solution provided by the embodiment of the present application, the method for determining the operating condition of the power generation system provided by the embodiment of the present application will be described below with reference to the accompanying drawings.

[0123] The method for determining the operating condition of the power generation system provided by the embodiment of the present application is applied to the power generation system. Specifically, the embodiment of the present application can be applied to the control device of the power generation system. As an example, the control device is configured with software for realizing the determination of the operating condition. The power generation system includes a thermal power unit and two energy storage systems. The two energy storage systems include an exothermic energy storage system and an endothermic energy storage system. The exothermic energy storage system is used to supplement the power generation of the thermal power unit, and the endothermic energy storage system is used to extract the power generation of the thermal power unit. As an example, the power generation system is a machine-boiler-energy storage thermal power unit. The thermal power unit is a coal-fired unit. The exothermic energy storage system is a molten salt system. The endothermic energy storage system is a condensate heat storage system. The machine-boiler-energy storage thermal power unit is an example provided by the embodiment of the present application, and the embodiment of the present application does not limit the specific types of equipment included in the power generation system.

[0124] See Figure 1 As shown, this figure is a schematic flowchart of a method for determining the operating condition of a power generation system provided by an embodiment of the present application.

[0125] S101: Obtain system parameters of the power generation system and an automatic generation control (AGC) instruction.

[0126] The system parameters of the power generation system can reflect the operating ability of the power generation system. The embodiment of the present application does not limit the acquisition method of the system parameters. In a possible implementation manner, the system parameters are obtained based on the operating state of the power generation system and the parameters preset in the power generation system.

[0127] The system parameters of the power generation system include the total power generation of the power generation system, the power generation of the thermal power unit, the power adjustment rate of the power generation system, and the power adjustment rate of the thermal power unit. The total power generation of the power generation system can be the total power generation of the power generation system when obtaining the AGC command. The power generation of the thermal power unit can be the total power generation of the thermal power unit when obtaining the AGC command. The power adjustment rate of the power generation system is also called the load change rate of the power generation system, which is the rate at which the power generation system adjusts its power. The power adjustment rate of the thermal power unit is also called the load change rate of the thermal power unit, which is the rate at which the thermal power unit adjusts its power.

[0128] As an example, taking the boiler-turbine-energy storage thermal power unit as an example, obtain the heat storage capacity of the molten salt system, the extraction steam capacity of the condensate heat storage system, the power adjustment rate of the coal-fired unit, the load of the coal-fired unit, the load of the molten salt system, and the load of the condensate heat storage system. Determine the power adjustment rate of the boiler-turbine-energy storage thermal power unit using the heat storage capacity of the molten salt system, the extraction steam capacity of the condensate heat storage system, and the power adjustment rate of the coal-fired unit. Determine the total power generation of the boiler-turbine-energy storage thermal power unit using the load of the coal-fired unit, the load of the molten salt system, and the load of the condensate heat storage system.

[0129] The system parameters include the total power generation L of the boiler-turbine-energy storage thermal power unit all ; the power generation L of the coal-fired unit b , the power adjustment rate of the coal-fired unit is n (megawatts per minute), and the power adjustment rate of the boiler-turbine-energy storage thermal power unit is m (megawatts per minute). Among them, |n| ≤ |m|. The English representation of megawatts per minute is: MW / min.

[0130] The positive or negative value of the power adjustment rate determines the operating state of increasing or decreasing power. If the power adjustment rate is positive, it means that the current operating state is increasing power. If the power adjustment rate is negative, it means that the current operating state is decreasing power.

[0131] The AGC command is used to indicate the target load to which the total power of the power generation system needs to be adjusted. In an ideal situation, when the power generation system reaches the target load indicated by the current AGC command, the target load indicated by the AGC command at the next moment can change.

[0132] In addition, the system parameters can also include that the current power of the energy storage system is P fl (MW), and its positive value indicates the operation of the exothermic energy storage system, and the negative value indicates the operation of the endothermic energy storage system.

[0133] S102: Determine the adjustment parameter using the system parameter and the target load.

[0134] System parameters can reflect the operating state of the current power generation system. The target load can indicate the power that the power generation system needs to reach, that is, the target load. Using the system parameters and the target load, adjustment parameters are determined. The adjustment parameters include the power adjustment difference of the power generation system, the power adjustment difference of the thermal power unit, the power adjustment duration of the power generation system, and the power adjustment duration of the thermal power unit.

[0135] Among them, the power adjustment difference of the power generation system is the difference between the target load and the total power generation of the power generation system. The power adjustment difference of the thermal power unit is the difference between the target load and the power generation of the thermal power unit. The power adjustment duration of the power generation system is the ratio of the power adjustment difference of the power generation system to the power adjustment rate of the power generation system. The power adjustment duration of the thermal power unit is the ratio of the power adjustment difference of the thermal power unit to the power adjustment rate of the thermal power unit.

[0136] Taking the above-mentioned machine-boiler-energy storage thermal power unit as an example, the calculation method of the power adjustment difference of the power generation system is shown in Formula (1):

[0137] Δ1 = AGC1 - L all (1)

[0138] The calculation method of the power adjustment difference of the thermal power unit is shown in Formula (2):

[0139] Δ2 = AGC1 - L b (2)

[0140] AGC1 represents the target load indicated by the AGC command.

[0141] The power adjustment duration of the power generation system is

[0142] The power adjustment duration of the thermal power unit is

[0143] Δ1 and m have the same sign, and Δ2 and n have the same sign.

[0144] S103: Determine the target operating condition from the preset candidate operating conditions according to one or more of the positive and negative of the parameters included in the adjustment parameters and the magnitude relationship between the parameters.

[0145] Use the adjustment parameters to determine the target operating condition where the power generation system is currently located. Specifically, determine one or more of the positive and negative of the parameters included in the adjustment parameters, and the magnitude relationship between the parameters, and determine the target operating condition from the preset candidate operating conditions according to the positive and negative of the parameters and / or the magnitude relationship between the parameters.

[0146] The preset candidate operating conditions are the possible operating conditions of the power generation system set in advance. The candidate operating conditions are used to represent the operating state of the power generation system and to indicate the power adjustment methods for the two energy storage systems to achieve the total power generation of the power generation system reaching the target load. From the candidate operating conditions, the target operating condition in which the current power generation system is operating is selected according to the adjustment parameters, and the power adjustment methods for the two energy storage systems indicated by the target operating condition can be determined, so as to adjust the operating modes of the thermal power unit and the two energy storage systems.

[0147] It should be noted that the power adjustment methods for the two energy storage systems indicated by the target operating condition can be the methods of calling the energy storage system to adjust the power set in advance. The examples of the power adjustment methods for the two energy storage systems indicated by the embodiments of the present application are how to select and adjust the energy storage system and start or exit the power adjustment of the energy storage system in different adjustment stages. In some possible implementation manners, more specific power adjustment methods of the energy storage system can be set according to the specific capabilities of the actual energy storage system. The embodiments of the present application do not limit this.

[0148] In one possible implementation manner, the candidate operating conditions include one or more of normal operating conditions and special operating conditions. Under normal operating conditions, during the process of the total power generation of the power generation system reaching the target load, the operating parameters of the energy storage system are within the parameter range. Under special operating conditions, during the process of the total power generation of the power generation system reaching the target load, the probability that the operating parameters of the energy storage system exceed the parameter range of the energy storage system is greater than the probability threshold. That is to say, under special operating conditions, the possibility that the operating parameters of the energy storage system exceed the parameter range is relatively large. The special operating condition is an operating condition in a relatively special scenario compared with the normal operating condition.

[0149] The embodiments of the present application provide two specific implementation manners for determining the target operating condition from the preset candidate operating conditions according to one or more of the positive and negative of the parameters included in the adjustment parameters and the magnitude relationship between the parameters. Please refer to the following text.

[0150] Based on the relevant content of S101 - S103, it can be seen that the method for determining the operating condition applied to the power generation system provided by the embodiments of the present application can determine the target operating condition of the power generation system, which is beneficial to adjusting the operation of the energy storage system based on the power adjustment methods for the energy storage system indicated by the target operating condition, effectively realizing the decomposition of the AGC instruction, improving the coordination between the two energy storage systems and the operation of the thermal power unit, and meeting the power generation requirements.

[0151] The embodiments of the present application provide two specific implementation manners for determining the target operating condition from the preset candidate operating conditions according to one or more of the positive and negative of the parameters included in the adjustment parameters and the magnitude relationship between the parameters.

[0152] The first type: Determine the candidate operating conditions corresponding to the conditions satisfied by the adjustment parameters, and determine them as the target operating conditions.

[0153] Each candidate operating condition has a corresponding condition determination condition. After obtaining the adjustment parameters, determine the condition determination conditions satisfied by the adjustment parameters, and use the candidate operating conditions corresponding to the condition determination conditions as the target operating conditions. Among them, the condition determination conditions corresponding to the candidate operating conditions include one or more of the positive and negative of the parameters included in the preset adjustment parameters and the magnitude relationship between the parameters.

[0154] Specifically, according to the adjustment parameters, determine the positive and negative of the power adjustment difference of the power generation system, that is, the magnitude relationship between the power adjustment difference of the power generation system and 0. Determine the magnitude relationship between the power adjustment difference of the power generation system and the power adjustment difference of the power generation system. The power adjustment duration of the power generation system and the power adjustment duration of the thermal power unit. Determine the satisfied operating conditions, and then determine the candidate operating conditions corresponding to the satisfied operating conditions as the target operating conditions.

[0155] Taking the above-mentioned machine-boiler-energy storage thermal power unit as an example, the embodiments of the present application provide ten candidate operating conditions and the corresponding condition determination conditions for each candidate operating condition.

[0156] To better describe the operating conditions, first divide and name the basic working scenarios of the energy storage system. The energy storage system presents Figure 2 the power curve shown. Figure 2 This is a schematic diagram of the power curve of the basic working scenario of the energy storage system provided by the embodiments of the present application. The black line represents the load indicated by the AGC command. The increased load is the target load indicated by the current AGC command. The blue line represents the power of the machine-boiler-energy storage thermal power unit indicated by the power adjustment command of the machine-boiler-energy storage thermal power unit. The red line represents the power of the coal-fired unit indicated by the power adjustment command of the coal-fired unit. In the A stage of increasing / decreasing power, that is, increasing / decreasing load, neither the machine-boiler-energy storage thermal power unit nor the coal-fired unit reaches the target load indicated by the AGC command. In the B stage of increasing / decreasing power, that is, increasing / decreasing load, the machine-boiler-energy storage thermal power unit reaches the target load indicated by the AGC command, and the coal-fired unit does not meet the command requirements. The operating conditions provided by the embodiments of the present application occur in the B stage and later of increasing / decreasing power.

[0157] Operating condition 1:

[0158] Operating condition 1 is a normal operating condition, and the condition determination condition is shown in formula (3):

[0159]

[0160] Operation process of working condition 1 Figure 3 As shown. Among them, Figure 3 The upper figure in the figure shows the power operation status. Figure 3 The horizontal axis of the above figure is time, and the vertical axis represents power (load). The black line represents the load indicated by the AGC instruction. The load after the increase is the target load indicated by this AGC instruction. The blue line represents the power of the machine-boiler-storage thermal power unit indicated by the power adjustment instruction of the machine-boiler-storage thermal power unit. The red line represents the power of the coal-fired unit indicated by the power adjustment instruction of the coal-fired unit.

[0161] The power adjustment instructions of the generator-boiler-storage thermal power unit and the power adjustment instructions of the coal-fired unit are obtained by decomposing the AGC instructions under working condition 1.

[0162] Working condition 1 is used to instruct the heat absorption energy storage system and the heat release energy storage system to adjust the power in sequence. Figure 3 As shown in the figure below, this figure is a schematic diagram of the power adjustment method of the energy storage system in working condition 1 provided in an embodiment of the present application. Figure 3 The horizontal axis of the figure below is time, and the vertical axis is the output command for calling the energy storage system to output. The output command reflects the degree of power adjustment of the energy storage system.

[0163] based on Figure 3 In the operating condition 1 shown in the figure, before the red line intersects with the blue line, the condensate thermal storage system extracts steam to store energy, and after the intersection, the molten salt system releases heat to generate power. Figure 3 When the intersection of the blue line and the red line in the figure is on the black line, the molten salt system stops releasing heat and outputting power.

[0164] Working condition 2:

[0165] Working condition 2 is the normal operating condition. The working condition determination conditions are shown in formula (4):

[0166]

[0167] See the operation process of working condition 2 for details. Figure 4 As shown. Among them, Figure 4 The upper figure in the figure shows the power operation status. Figure 4 The horizontal axis of the above figure is time, and the vertical axis represents power (load). The black line represents the load indicated by the AGC instruction. The load after the increase is the target load indicated by this AGC instruction. The blue line represents the power of the machine-boiler-storage thermal power unit indicated by the power adjustment instruction of the machine-boiler-storage thermal power unit. The red line represents the power of the coal-fired unit indicated by the power adjustment instruction of the coal-fired unit.

[0168] The power adjustment instructions of the generator-boiler-storage thermal power unit and the power adjustment instructions of the coal-fired unit are obtained by decomposing the AGC instructions under working condition 2.

[0169] The reason for Condition 2 is that during continuous load increase, the unit-boiler-storage thermal power unit does not exit the second load increase stage, that is, Stage B. Condition 2 often occurs when the target load indicated by continuous AGC commands continuously rises.

[0170] Condition 2 is used to indicate the invocation of the exothermic energy storage system to adjust power. See Figure 4 the following figure in Figure 4 . The abscissa of the following figure in

[0171] is time, and the ordinate is the output command for invoking the output of the energy storage system. The output command reflects the degree of power adjustment by invoking the energy storage system. The condensate heat storage system completely exits, and the molten salt system supports the load increase scenario. The molten salt system is invoked to adjust power.

[0172] Condition 3:

[0173]

[0174] The operation process of Condition 3 is shown in Figure 5 . Among them, Figure 5 the upper figure in Figure 5 represents the power operation state. The abscissa of the upper figure in

[0175] is time, and the ordinate represents power (load). The black line represents the load indicated by the AGC command. The decreased load is the target load indicated by the current AGC command. The blue line represents the power of the unit-boiler-storage thermal power unit indicated by the power adjustment command of the unit-boiler-storage thermal power unit. The red line represents the power of the coal-fired unit indicated by the power adjustment command of the coal-fired unit.

[0176] Condition 3 is used to indicate the sequential invocation of the exothermic energy storage system and the endothermic energy storage system to adjust power. See Figure 5 the following figure in Figure 5 . The abscissa of the following figure in

[0177] is time, and the ordinate is the output command for invoking the output of the energy storage system. The output command reflects the degree of power adjustment by invoking the energy storage system. Before the red line intersects with the blue line, the molten salt system outputs heat, and after the red line intersects with the blue line, the condensate heat storage system performs steam extraction and energy storage. When the intersection point of the red line and the blue line is on the black line, the condensate heat storage system stops steam extraction and energy storage. Condition 4:

[0178] Condition 4 is the normal operating condition, and the condition determination conditions are shown in Formula (6):

[0179]

[0180] The operation process of Condition 4 is shown in Figure 6 as shown. Among them, Figure 6 the upper figure in shows the power operation state. Figure 6 In the upper figure, the abscissa is time, and the ordinate represents power (load). The black line represents the load indicated by the AGC command. The load after the decrease is the target load indicated by this AGC command. The blue line represents the power of the boiler-turbine-energy storage thermal power unit indicated by the power adjustment command of the boiler-turbine-energy storage thermal power unit. The red line represents the power of the coal-fired unit indicated by the power adjustment command of the coal-fired unit.

[0181] The power adjustment command of the boiler-turbine-energy storage thermal power unit and the power adjustment command of the coal-fired unit are obtained after decomposing the AGC command under Condition 4.

[0182] The reason for the appearance of Condition 4 is that during this load reduction, the boiler-turbine-energy storage thermal power unit did not exit the second stage of load reduction, that is, Stage B, and the condensate heat storage system did not completely exit. Condition 4 mostly appears in the scenario of continuous load reduction indicated by the AGC command.

[0183] Condition 4 is used to indicate the call of the endothermic energy storage system to adjust power. See the lower figure in Figure 6 as shown. This figure is a schematic diagram of the power adjustment method of the energy storage system under Condition 4 provided by the embodiment of the present application. Call the condensate heat storage system to adjust power. Figure 6 In the lower figure of, the abscissa is time, and the ordinate is the output command for calling the output of the energy storage system. The output command reflects the degree of calling the energy storage system to adjust power.

[0184] Condition 5:

[0185] Condition 5 is the normal operating condition, and the condition determination conditions are shown in Formula (7):

[0186] Δ1 = Δ2 (7)

[0187] The operation process of Condition 5 is shown in Figure 7 as shown. Among them, Figure 7 the upper figure in shows the power operation state. Figure 7In the upper graph above, the abscissa represents time and the ordinate represents power (load). The black line represents the load indicated by the AGC command. Condition 5 includes two stages of target load adjustment, namely the rising stage and the falling stage of the target load. The target load indicated by the current AGC command is the load after rising or the load after falling. The blue line represents the power of the boiler-turbine-thermal energy storage power generation unit indicated by the power adjustment command of the boiler-turbine-thermal energy storage power generation unit. The red line represents the power of the coal-fired unit indicated by the power adjustment command of the coal-fired unit.

[0188] The power adjustment command of the boiler-turbine-thermal energy storage power generation unit and the power adjustment command of the coal-fired unit are obtained by decomposing the AGC command under Condition 5.

[0189] When adjusting the power, the output powers of both the boiler-turbine-thermal energy storage power generation unit and the coal-fired unit have reached the requirements of the AGC command.

[0190] Condition 5 is used to indicate that the exothermic energy storage system is called to adjust the power in the rising stage, and the endothermic energy storage system is called to adjust the power in the falling stage. See Figure 7 the lower graph below. This graph is a schematic diagram of the power adjustment method of the energy storage system under Condition 5 provided by the embodiment of the present application. Figure 7 In the lower graph below, the abscissa is time and the ordinate is the output command for calling the energy storage system output. The output command reflects the degree of calling the energy storage system to adjust the power. The molten salt system is called to adjust the power in the rising stage, and the condensate heat storage system is called to adjust the power in the falling stage.

[0191] Condition 6:

[0192] Condition 6 is a normal operating condition, and the condition for determining the condition is: Δ1 = 0.

[0193] Condition 6 includes three sub-conditions. The operation process of the first sub-condition of Condition 6 is shown in Figure 8a as shown. The operation process of the second sub-condition of Condition 6 is shown in Figure 8b as shown. The operation process of the third sub-condition of Condition 6 is shown in Figure 8c as shown.

[0194] Among them, Figure 8a the upper graph above, Figure 8b the upper graph above, and Figure 8c the upper graph above represent the power operation state. Figure 8a the upper graph above, Figure 8b the upper graph above, and Figure 8cIn the above figure, the abscissa represents time and the ordinate represents power (load). The black line represents the load indicated by the AGC command. The target loads indicated by this AGC command are rising, falling, and remaining unchanged respectively. The blue line represents the power of the boiler-turbine-energy storage thermal power unit indicated by the power adjustment command of the boiler-turbine-energy storage thermal power unit. The red line represents the power of the coal-fired unit indicated by the power adjustment command of the coal-fired unit.

[0195] The power adjustment command of the boiler-turbine-energy storage thermal power unit and the power adjustment command of the coal-fired unit are obtained after decomposing the AGC command under Condition 6.

[0196] Condition 6 is used to indicate that according to the power adjustment difference of the thermal power unit, one of the two energy storage systems is selected to adjust the power, or the power is not adjusted. See Figure 8a the lower figure of Figure 8b the lower figure of Figure 8c the lower figure of. The figure is a schematic diagram of the power adjustment method of the energy storage system in three sub-conditions of Condition 6 provided by the embodiment of the present application. Figure 8a the lower figure of Figure 8b the lower figure of Figure 8c In the lower figure of, the abscissa is time and the ordinate is the output command for calling the output of the energy storage system. The output command reflects the degree of calling the energy storage system to adjust the power.

[0197] As Figure 8a shown in the lower figure of, the power adjustment difference of the thermal power unit is greater than 0, that is, Δ2>0, and the exothermic energy storage system is called to adjust the power, that is, the molten salt system is in the withdrawal stage. As Figure 8b shown in the lower figure of, the power adjustment difference of the thermal power unit is less than 0, that is, Δ2<0, and the endothermic energy storage system is called to adjust the power, that is, the condensate heat storage system is in the withdrawal stage. As Figure 8c shown in the lower figure of, the power adjustment difference of the thermal power unit is equal to 0, that is, Δ2 = 0, and the power is not adjusted.

[0198] Condition 7:

[0199] Condition 7 is a special operating condition. The condition determination conditions are shown in Formula (8):

[0200]

[0201] The operation process of Condition 7 is shown in Figure 9 . Among them, Figure 9 the upper figure in represents the power operation state. Figure 9In the upper figure above, the horizontal axis represents time and the vertical axis represents power (load). The black line represents the load indicated by the AGC command. The target load indicated by the current AGC command is the increased load. The blue line represents the power of the boiler-turbine-energy storage thermal power unit indicated by the power adjustment command of the boiler-turbine-energy storage thermal power unit. The red line represents the power of the coal-fired unit indicated by the power adjustment command of the coal-fired unit.

[0202] The power adjustment command of the boiler-turbine-energy storage thermal power unit and the power adjustment command of the coal-fired unit are obtained by decomposing the AGC command under condition 7.

[0203] The reason for condition 7 is that during this load increase, that is, during the power increase stage, the unit has not exited the load decrease, that is, stage B of power decrease, and the condensate heat storage system has not completely stopped working.

[0204] Condition 7 is used to indicate the call to the endothermic energy storage system to adjust power. See Figure 9 as shown in the lower figure below. This figure is a schematic diagram of the power adjustment method of the energy storage system under condition 7 provided by the embodiment of the present application. Figure 9 In the lower figure below, the horizontal axis is time and the vertical axis is the output command for calling the output of the energy storage system. The output command reflects the degree of calling the energy storage system to adjust power. Call the condensate heat storage system to adjust power.

[0205] Condition 8:

[0206] Condition 8 is a special operating condition. The condition determination conditions are shown in formula (9):

[0207]

[0208] The operation process of condition 8 is shown in Figure 10 as shown. Among them, Figure 10 the upper figure above represents the power operation state. Figure 10 In the upper figure above, the horizontal axis represents time and the vertical axis represents power (load). The black line represents the load indicated by the AGC command. The target load indicated by the current AGC command is the decreased load. The blue line represents the power of the boiler-turbine-energy storage thermal power unit indicated by the power adjustment command of the boiler-turbine-energy storage thermal power unit. The red line represents the power of the coal-fired unit indicated by the power adjustment command of the coal-fired unit.

[0209] The power adjustment command of the boiler-turbine-energy storage thermal power unit and the power adjustment command of the coal-fired unit are obtained by decomposing the AGC command under condition 8.

[0210] The reason for condition 8 is that during this load decrease, that is, during the power decrease stage, the coal-fired unit has not exited the load increase, that is, stage B of power increase, and the molten salt system has not completely exited.

[0211] Operating condition 8 is used to indicate the call for the exothermic energy storage system to adjust the power. Refer to Figure 10 as shown in the following figure, which is a schematic diagram of the power adjustment method of the energy storage system under operating condition 8 provided by the embodiment of the present application. Figure 10 The abscissa of the following figure in

[0212] is time, and the ordinate is the output command for calling the output of the energy storage system. The output command reflects the degree of adjusting the power of the energy storage system. Call the molten salt system to adjust the power.

[0213] Operating condition 9:

[0214]

[0215] The operation process of operating condition 9 refers to Figure 11 as shown. Among them, Figure 11 the upper figure in Figure 11 represents the power operation state. The abscissa of the upper figure in

[0216] is time, and the ordinate represents power (load). The black line represents the load indicated by the AGC command. The target load indicated by the current AGC command is the increased load. The blue line represents the power of the boiler-turbine-energy storage thermal power unit indicated by the power adjustment command of the boiler-turbine-energy storage thermal power unit. The red line represents the power of the coal-fired unit indicated by the power adjustment command of the coal-fired unit.

[0217]

[0218] During the load increase, that is, during the power adjustment increase stage, the coal-fired unit has not exited the historical load decrease, that is, the B stage of power adjustment decrease, and the condensate heat storage system has not completely exited. The new target load is lower than the power output by the current coal-fired unit. Operating condition 9 is used to indicate the call for the endothermic energy storage system to adjust the power. Refer to Figure 11 as shown in the following figure, which is a schematic diagram of the power adjustment method of the energy storage system under operating condition 9 provided by the embodiment of the present application. Figure 11 The abscissa of the following figure in

[0219] is time, and the ordinate is the output command for calling the output of the energy storage system. The output command reflects the degree of adjusting the power of the energy storage system. Call the condensate heat storage system to adjust the power.

[0220] Operating condition 10:

[0221]

[0222] The operation process of operating condition 10 refers toFigure 12 As shown in the figure. Among them, Figure 12 the upper figure in [Figure Name] represents the power operation state. Figure 12 In the upper figure in [Figure Name], the abscissa is time, and the ordinate represents power (load). The black line represents the load indicated by the AGC command. The target load indicated by this AGC command is the load after the decrease. The blue line represents the power of the boiler-turbine-thermal energy storage power generation unit indicated by the power adjustment command of the boiler-turbine-thermal energy storage power generation unit. The red line represents the power of the coal-fired unit indicated by the power adjustment command of the coal-fired unit.

[0223] The power adjustment command of the boiler-turbine-thermal energy storage power generation unit and the power adjustment command of the coal-fired unit are obtained by decomposing the AGC command under Condition 10.

[0224] During the load reduction, that is, the stage where the adjusted power decreases this time, the coal-fired unit does not exit the historical load increase, that is, Stage B where the adjusted power increases, and the molten salt system does not completely exit. The new target load is higher than the power output of the current coal-fired unit.

[0225] Condition 10 is used to indicate the call of the exothermic energy storage system to adjust power. See Figure 12 the following figure in [Figure Name], which is a schematic diagram of the power adjustment method of the energy storage system under Condition 10 provided by the embodiment of the present application. Figure 12 In the following figure in [Figure Name], the abscissa is time, and the ordinate is the output command for calling the energy storage system to output power. The output command reflects the degree of calling the energy storage system to adjust power. The molten salt system is called to adjust power.

[0226] Second: Determine the target operating condition by using one or more of the positive and negative of the parameters included in the adjustment parameters and the magnitude relationship between the parameters.

[0227] In a possible implementation manner, the candidate operating conditions include normal operating conditions.

[0228] First, determine the magnitude relationship between the power adjustment difference of the power generation system and 0.

[0229] If the power adjustment difference of the power generation system is 0, then determine that the target operating condition is the first condition. The first condition is used to indicate selecting one of the two energy storage systems to adjust power according to the power adjustment difference of the thermal power unit, or not adjusting power. Specifically, determine the positive and negative of the power adjustment difference of the thermal power unit. If the power adjustment difference of the thermal power unit is greater than 0, that is, a positive value, call the exothermic energy storage system to adjust power. If the power adjustment difference of the thermal power unit is equal to 0, it means that the power generation system is in a stable state, and the power of the power generation system is not adjusted. If the power adjustment difference of the thermal power unit is less than 0, that is, a negative value, call the endothermic energy storage system to adjust power.

[0230] Taking the above power generation system as an example of a machine-boiler-storage thermal power unit and ten operating conditions, determine whether Δ1 is equal to 0. If Δ1 = 0, then determine that the target operating condition is the first operating condition. As an example, the first operating condition is the above-mentioned condition 6.

[0231] If the power adjustment difference of the power generation system is not 0, then judge the magnitude relationship between the power adjustment difference of the power generation system and the power adjustment difference of the thermal power unit. If the power adjustment difference of the power generation system is equal to the power adjustment difference of the thermal power unit, determine that the target operating condition is the second operating condition. The second operating condition includes the rising stage and the falling stage of the target load. The second operating condition is used to indicate that the exothermic energy storage system is called to adjust the power during the rising stage, and the endothermic energy storage system is called to adjust the power during the falling stage.

[0232] Taking the above power generation system as an example of a machine-boiler-storage thermal power unit and ten operating conditions, judge whether Δ1 is equal to Δ2. If Δ1 = Δ2, then determine that the target operating condition is the second operating condition. As an example, the second operating condition is the above-mentioned condition 5.

[0233] If the power adjustment difference of the power generation system is not equal to the power adjustment difference of the thermal power unit, judge the positive and negative values of the power adjustment difference of the power generation system and the power adjustment difference of the thermal power unit, and the magnitude relationship between the power adjustment duration of the thermal power unit and the power adjustment duration of the power generation system.

[0234] It should be noted that if the candidate operating conditions include characteristic operating conditions, and the power adjustment differences of the power generation system and the thermal power unit have different signs, or the power adjustment differences of the power generation system and the thermal power unit have the same sign and the power adjustment duration of the thermal power unit is less than the power adjustment duration of the power generation system, then determine that the target operating condition is a special operating condition. Please refer to the following description of the special operating condition.

[0235] If the power adjustment differences of the power generation system and the thermal power unit have the same sign, and the power adjustment duration of the thermal power unit is greater than or equal to the power adjustment duration of the power generation system, further judge the magnitude relationship between the power adjustment difference of the power generation system and 0. That is, when it is determined that Δ1 and Δ2 have the same sign, Judge the magnitude relationship between Δ1 and 0.

[0236] If the power adjustment difference of the power generation system is greater than 0, determine that the target operating condition is a load rising condition. The load rising condition is the condition where the target load is in the rising stage. The load rising condition is used to indicate that at least the exothermic energy storage system is called to adjust the power.

[0237] Further, the load increase working conditions include a third working condition and a fourth working condition. After determining that the power adjustment difference of the power generation system is greater than 0, the magnitude relationship between the power adjustment difference of the thermal power unit and the power adjustment difference of the power generation system is judged.

[0238] If the power adjustment difference of the thermal power unit is greater than the power adjustment difference of the power generation system, the target operating condition is determined to be the third working condition. The third working condition is used to indicate calling the exothermic energy storage system to adjust the power. As an example, taking the above power generation system as a boiler-turbine-energy storage thermal power unit and ten working conditions as an example, Δ1>0, and Δ1>Δ2, the third working condition is the above-mentioned condition 2.

[0239] If the power adjustment difference of the thermal power unit is less than the power adjustment difference of the power generation system, the target operating condition is determined to be the fourth working condition. The fourth working condition is used to indicate calling the endothermic energy storage system and the exothermic energy storage system to adjust the power in sequence. As an example, taking the above power generation system as a boiler-turbine-energy storage thermal power unit and ten working conditions as an example, Δ1>0, and Δ1<Δ2, the fourth working condition is the above-mentioned condition 1.

[0240] If the power adjustment difference of the power generation system is less than 0, the target operating condition is determined to be the load decrease working condition. The load decrease working condition is the working condition when the target load is in the decreasing stage. The load decrease working condition is used to indicate calling at least the endothermic energy storage system to adjust the power.

[0241] Further, the load decrease working conditions include a fifth working condition and a sixth working condition. After determining that the power adjustment difference of the power generation system is less than 0, the magnitude relationship between the power adjustment difference of the thermal power unit and the power adjustment difference of the power generation system is judged.

[0242] If the power adjustment difference of the thermal power unit is greater than the power adjustment difference of the power generation system, the target operating condition is determined to be the fifth working condition. The fifth working condition is used to indicate calling the exothermic energy storage system and the endothermic energy storage system to adjust the power in sequence. As an example, taking the above power generation system as a boiler-turbine-energy storage thermal power unit and ten working conditions as an example, Δ1<0, and Δ1<Δ2, the fifth working condition is the above-mentioned condition 3.

[0243] If the power adjustment difference of the thermal power unit is less than the power adjustment difference of the power generation system, the target operating condition is determined to be the sixth working condition. The sixth working condition is used to indicate calling the endothermic energy storage system to adjust the power. As an example, taking the above power generation system as a boiler-turbine-energy storage thermal power unit and ten working conditions as an example, Δ1<0, and Δ1>Δ2, the sixth working condition is the above-mentioned condition 4.

[0244] In a possible implementation manner, the candidate operating conditions include special operating conditions;

[0245] Judge the positive and negative of the power adjustment difference of the power generation system and the power adjustment difference of the thermal power unit. If the power adjustment differences of the power generation system and the thermal power unit have different signs, then judge the magnitude relationship between the power adjustment difference of the power generation system and 0. Taking the above power generation system as an example of a boiler-turbine-storage thermal power unit and ten working conditions, if Δ1 and Δ2 have different signs, judge the magnitude relationship between Δ1 and 0.

[0246] If the power adjustment difference of the power generation system is greater than 0, determine that the target operating condition is the seventh condition. The seventh condition is the condition in the target load rising stage. The seventh condition is used to indicate the invocation of the endothermic energy storage system to adjust the power. As an example, taking the above power generation system as an example of a boiler-turbine-storage thermal power unit and ten working conditions, if Δ1>0, the seventh condition is the above-mentioned condition 9.

[0247] If the power adjustment difference of the power generation system is less than 0, determine that the target operating condition is the eighth condition. The eighth condition is the condition in the target load falling stage. The eighth condition is used to indicate the invocation of the exothermic energy storage system to adjust the power. As an example, if Δ1<0, the eighth condition is the above-mentioned condition 10.

[0248] If the power adjustment differences of the power generation system and the thermal power unit have the same sign, and the power adjustment duration of the thermal power unit is less than the power adjustment duration of the power generation system, judge the magnitude relationship between the power adjustment difference of the power generation system and 0. Taking the above power generation system as an example of a boiler-turbine-storage thermal power unit and ten working conditions, if Δ1 and Δ2 have the same sign, and Judge the magnitude relationship between Δ1 and 0.

[0249] If the power adjustment difference of the power generation system is greater than 0, determine that the target operating condition is the ninth condition. The ninth condition is the condition in the target load rising stage. The ninth condition is used to indicate the invocation of the endothermic energy storage system to adjust the power. As an example, if Δ1>0, the ninth condition is the above-mentioned condition 7.

[0250] If the power adjustment difference of the power generation system is less than 0, determine that the target operating condition is the tenth condition. The tenth condition is the condition in the target load falling stage. The tenth condition is used to indicate the invocation of the exothermic energy storage system to adjust the power. As an example, if Δ1<0, the tenth condition is the above-mentioned condition 8.

[0251] When using the energy storage system to adjust the power of the power generation system, an abnormality of limited resources of the energy storage system may also occur. The abnormality of limited resources of the energy storage system will affect the normal use of the energy storage system to adjust the power of the power generation system.

[0252] In some possible implementation manners, further, judge whether there will be a problem of limited resources abnormality of the energy storage system.

[0253] The resource - limited exceptions of the energy storage system include one or more of power - limited exceptions, capacity - limited exceptions, and rate - limited exceptions. The capacity - limited exception means that the energy storage capacity of the energy storage system cannot meet the energy gap during the current load - change process. The power - limited exception means that the power of the energy storage system cannot meet the maximum power required during the current load - change process. The rate - limited exception means that the start - up or shut - down rate of the energy storage system cannot meet the gap between the adjustment power rate for adjusting to the target load and the adjustment power rate of the coal - fired unit.

[0254] The embodiments of the present application respectively provide possible implementation methods for determining power - limited exceptions, capacity - limited exceptions, and rate - limited exceptions.

[0255] The first one: power - limited exception.

[0256] Respectively obtain the maximum power of two energy storage systems. If it is determined that a power - limited exception occurs by using the adjustment parameters and the maximum power of the two energy storage systems, output a power - limited exception reminder message.

[0257] The maximum power of the energy storage system is the maximum value of the power that the energy storage system can provide.

[0258] Taking the above - mentioned boiler - turbine - energy - storage thermal power unit as an example, the maximum power of the molten salt system is P 1flmax (MW). The maximum power of the condensate heat storage system is P 2flmax (MW). Among them, P 1flmax ≤0.

[0259] As an example, the embodiments of the present application provide a possible implementation manner for determining that a power - limited exception occurs by using the adjustment parameters and the maximum power of two energy storage systems.

[0260] If the power adjustment duration of the thermal power unit is greater than or equal to the power adjustment duration of the power generation system, calculate the product of the power adjustment difference of the power generation system and the first ratio to obtain the first product. Then calculate the difference between the power adjustment of the thermal power unit and the first product to obtain the target power. The first ratio is the ratio of the power adjustment rate of the thermal power unit to the power adjustment rate of the power generation system.

[0261] If the power adjustment duration of the thermal power unit is less than the power adjustment duration of the power generation system, calculate the product of the power adjustment difference of the thermal power unit and the second ratio to obtain the second product. Then calculate the difference between the second product and the power adjustment difference of the power generation system to obtain the target power. The second ratio is the ratio of the power adjustment rate of the power generation system to the power adjustment rate of the thermal power unit.

[0262] The calculation formula of the target power is shown in formula (12).

[0263]

[0264] The extreme values of the power range are the maximum powers of the two energy storage systems. As an example, the power range is P 2flmax ≤P ideal ≤P 1flmax . If the target power is within the power range, it indicates that the power of the energy storage system can support the maximum power difference between the power of the thermal power unit and the target load during this variable power process. If it is determined that the target power is not within the power range, it is determined that a power limit anomaly occurs.

[0265] It should be noted that if the exothermic energy storage system is a molten salt system, there is no power limit anomaly in the molten salt system.

[0266] The output power limit anomaly reminder information is used to remind of the power limit anomaly. The embodiments of the present application do not limit the manner of outputting the power limit anomaly reminder information. For example, it can be in the form of display or playback. The power limit anomaly reminder information can be in the form of text or audio / video, for example.

[0267] Second type: rate limit anomaly.

[0268] In the case where the candidate operating conditions include special operating conditions, if it is determined that the target operating condition is a special operating condition, it is determined that there is a rate limit anomaly, and a rate limit anomaly reminder information is output.

[0269] The rate limit anomaly indicates that there may be a deviation between the actual operating power curve and the theoretical operating power curve of the energy storage system.

[0270] The output rate limit anomaly reminder information is used to remind of the rate limit anomaly. The embodiments of the present application do not limit the manner of outputting the rate limit anomaly reminder information. For example, it can be in the form of display or playback. The rate limit anomaly reminder information can be in the form of text or audio / video, for example.

[0271] Third type: capacity limit anomaly.

[0272] Using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit, determine the energy required for this execution of the AGC instruction;

[0273] If it is determined that the energy is not within the energy range, it is determined that a capacity limit anomaly occurs, and a capacity limit anomaly reminder information is output.

[0274] In a possible implementation manner, the target operating condition indicates to call the thermal energy storage system and the endothermic energy storage system.

[0275] As an example, the target operating conditions are the above-mentioned condition 1 and condition 3. The method for determining whether the capacity limitation anomaly occurs is determined by, for example, formula (13).

[0276]

[0277] When determining the energy required to execute the AGC instruction this time by using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit, two energy storage systems need to be considered. The energy required to execute the AGC instruction this time can be calculated by the following method:

[0278] Using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit, calculate the first energy of the exothermic energy storage system and the second energy of the endothermic energy storage system respectively.

[0279] As an example, the first energy can be calculated by formula (14):

[0280]

[0281] The second energy can be calculated by formula (15):

[0282]

[0283] S 1_1 S 1_2 ≤0 always holds. If S 1_1 ≤0, then S 1_1 part is the energy storage energy of the endothermic energy storage system, and S 1_2 is the output energy of the exothermic energy storage system. If S 1_1 >0, S 1_1 is the output energy of the exothermic energy storage system, and S 1_2 is the energy storage energy of the endothermic energy storage system.

[0284] The determination that the energy is not within the energy range includes

[0285] determining that the first energy is not within the energy range of the exothermic energy storage system, or the second energy is not within the energy range of the endothermic energy storage system.

[0286] For the energy range of the exothermic energy storage system and the energy range of the endothermic energy storage system, see formula (16) as follows:

[0287]

[0288] where the maximum energy storage capacity of the molten salt system at the current moment is C1max The maximum energy storage capacity of the kilowatt-hour and condensate heat storage system at the current moment is C 2max kilowatt-hours, where C 2max ≤ 0. The English representation of kilowatt-hour is MWh.

[0289] If the first energy and the second energy meet the conditions of formula (16), it indicates that the states of the two energy storage systems can meet the energy required during the adjustment of power in this process. If the first energy or the second energy does not meet the conditions of formula (16), it is determined that a capacity limitation anomaly occurs, and a capacity limitation anomaly reminder message is output.

[0290] In another possible implementation, the target operating condition indicates to call the thermal energy storage system or the endothermic energy storage system. As an example, the target operating condition is other conditions except the above-mentioned condition 1 and condition 3. When determining the energy required for this execution of the AGC instruction by using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit, only the called energy storage system needs to be considered. The energy required for this execution of the AGC instruction can be calculated in the following way:

[0291] Using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit, calculate the third energy. The third energy is the energy of the energy storage system indicated by the target operating condition.

[0292] As an example, the third energy can be calculated using formula (17):

[0293]

[0294] For the energy range of the energy storage system, see formula (18) as follows:

[0295] C 2max ≤ S1 ≤ C 1max (18)

[0296] If the third energy meets the conditions shown in formula (18), it means that the state of the energy storage system can meet the energy required during the adjustment of power in this process.

[0297] If the third energy does not meet the conditions shown in formula (18), it is determined that a capacity limitation anomaly occurs, and a capacity limitation anomaly reminder message is output.

[0298] The output capacity - limited exception reminder information is used to remind of the capacity - limited exception. The embodiments of the present application do not limit the manner of outputting the capacity - limited exception reminder information. For example, it can be in the form of display or playback. The capacity - limited exception reminder information can be in the form of text or audio - video, for example.

[0299] Based on the above - mentioned three methods for judging limited exceptions, when a limited exception occurs in the energy storage system, the type of the limited exception can be determined in a timely manner and the reminder information of the output limited exception can be output, so that the staff can understand the operation exception of the energy storage system in a timely manner, which is convenient for the staff to manage the energy storage system and is conducive to maintaining the safe and stable operation of the energy storage system.

[0300] Based on the method for determining the working condition of a power generation system provided by the above - mentioned method embodiments, the embodiments of the present application also provide a device for determining the working condition of a power generation system. The following will describe the device for determining the working condition of a power generation system in conjunction with the accompanying drawings.

[0301] See Figure 13 As shown in the figure, it is a schematic structural diagram of a device for determining the working condition of a power generation system provided by the embodiments of the present application. This device is applied to a heat storage system including two - stage cascade energy of molten salt and feed water. The power generation system includes a thermal power unit and two energy storage systems, and the two energy storage systems include an exothermic energy storage system and an endothermic energy storage system. As Figure 13 shown, the device for determining the working condition of a power generation system includes:

[0302] A first acquisition unit 1301, configured to acquire the system parameters of the power generation system and the automatic generation control (AGC) instruction. The system parameters include the total power generation of the power generation system, the power generation power of the thermal power unit, the power adjustment rate of the power generation system, and the power adjustment rate of the thermal power unit. The AGC instruction is used to indicate the target load to which the total power of the power generation system needs to be adjusted.

[0303] An adjustment parameter determination unit 1302, configured to determine adjustment parameters by using the system parameters and the target load. The adjustment parameters include the power adjustment difference of the power generation system, the power adjustment difference of the thermal power unit, the power adjustment duration of the power generation system, and the power adjustment duration of the thermal power unit.

[0304] A working condition determination unit 1303, configured to determine a target operating condition from a preset set of candidate operating conditions according to one or more of the positive and negative of the parameters included in the adjustment parameters and the magnitude relationship between the parameters. The target operating condition is used to indicate the power adjustment method for the two energy storage systems to achieve the total power generation of the power generation system reaching the target load.

[0305] In a possible implementation, the operating condition determination unit 1303 is specifically configured to determine the candidate operating condition corresponding to the operating condition determination condition satisfied by the adjustment parameter as the target operating condition, and the operating condition determination condition corresponding to the candidate operating condition includes one or more of the positive and negative of the parameters included in the preset adjustment parameter and the magnitude relationship between the parameters.

[0306] In a possible implementation, the candidate operating condition includes a normal operating condition; in the normal operating condition, during the process that the total power generation of the power generation system reaches the target load, the operating parameters of the energy storage system are within the parameter range of the energy storage system;

[0307] The operating condition determination unit 1303 is specifically configured to:

[0308] If the power adjustment difference of the power generation system is 0, determine that the target operating condition is the first operating condition, and the first operating condition is used to indicate selecting one of the two energy storage systems to adjust the power according to the power adjustment difference of the thermal power unit, or not adjusting the power;

[0309] If the power adjustment difference of the power generation system is equal to the power adjustment difference of the thermal power unit, determine that the target operating condition is the second operating condition, and the second operating condition includes the target load in the rising stage and the falling stage, and the second operating condition is used to indicate calling the exothermic energy storage system to adjust the power in the rising stage and calling the endothermic energy storage system to adjust the power in the falling stage;

[0310] If the power adjustment differences of the power generation system and the thermal power unit have the same sign, and the power adjustment duration of the thermal power unit is greater than or equal to the power adjustment duration of the power generation system, judge the magnitude relationship between the power adjustment difference of the power generation system and 0;

[0311] If the power adjustment difference of the power generation system is greater than 0, determine that the target operating condition is the load rising condition, and the load rising condition is the condition where the target load is in the rising stage, and the load rising condition is used to indicate calling at least the exothermic energy storage system to adjust the power;

[0312] If the power adjustment difference of the power generation system is less than 0, determine that the target operating condition is the load falling condition, and the load falling condition is the condition where the target load is in the falling stage, and the load falling condition is used to indicate calling at least the endothermic energy storage system to adjust the power.

[0313] In a possible implementation, the operating condition determination unit 1303 is used to determine that the target operating condition is the load rising condition, including:

[0314] The operating condition determination unit 1303 is specifically configured to:

[0315] If the power adjustment difference of the thermal power unit is greater than the power adjustment difference of the power generation system, determine that the target operating condition is the third condition, and the third condition is used to indicate that the exothermic energy storage system is called to adjust the power; if the power adjustment difference of the thermal power unit is less than the power adjustment difference of the power generation system, determine that the target operating condition is the fourth condition, and the fourth condition is used to indicate calling the endothermic energy storage system and the exothermic energy storage system to adjust the power in sequence;

[0316] In a possible implementation manner, the condition determination unit 1303 for determining that the target operating condition is a load decrease condition includes:

[0317] The condition determination unit 1303 is configured to, if the power adjustment difference of the thermal power unit is greater than the power adjustment difference of the power generation system, determine that the target operating condition is the fifth condition, and the fifth condition is used to indicate calling the exothermic energy storage system and the endothermic energy storage system to adjust the power in sequence; if the power adjustment difference of the thermal power unit is less than the power adjustment difference of the power generation system, determine that the target operating condition is the sixth condition, and the sixth condition is used to indicate calling the endothermic energy storage system to adjust the power.

[0318] In a possible implementation manner, the candidate operating conditions include special operating conditions; in the special operating conditions, during the process that the total power generation of the power generation system reaches the target load, the probability that the operating parameters of the energy storage system exceed the parameter range of the energy storage system is greater than the probability threshold;

[0319] The condition determination unit 1303 is specifically configured to:

[0320] If the power adjustment difference of the power generation system and the power adjustment difference of the thermal power unit have different signs, judge the magnitude relationship between the power adjustment difference of the power generation system and 0;

[0321] If the power adjustment difference of the power generation system is greater than 0, determine that the target operating condition is the seventh condition, and the seventh condition is the condition in the rising stage of the target load, and the seventh condition is used to indicate calling the endothermic energy storage system to adjust the power;

[0322] If the power adjustment difference of the power generation system is less than 0, determine that the target operating condition is the eighth condition, and the eighth condition is the condition in the falling stage of the target load, and the eighth condition is used to indicate calling the exothermic energy storage system to adjust the power;

[0323] If the sign of the power adjustment difference of the power generation system is the same as that of the power adjustment difference of the thermal power unit, and the power adjustment duration of the thermal power unit is less than that of the power generation system, determine the magnitude relationship between the power adjustment difference of the power generation system and 0;

[0324] If the power adjustment difference of the power generation system is greater than 0, determine that the target operating condition is the ninth condition, the ninth condition is the condition in the target load rising stage, and the ninth condition is used to indicate calling the endothermic energy storage system to adjust the power;

[0325] If the power adjustment difference of the power generation system is less than 0, determine that the target operating condition is the tenth condition, the tenth condition is the condition in the target load falling stage, and the tenth condition is used to indicate calling the exothermic energy storage system to adjust the power.

[0326] In a possible implementation manner, the device further includes:

[0327] A second acquisition unit, configured to respectively acquire the maximum powers of the two energy storage systems;

[0328] A first abnormality determination unit, configured to output a power limitation abnormality reminder message if it is determined that there is a power limitation abnormality by using the adjustment parameter and the maximum powers of the two energy storage systems.

[0329] In a possible implementation manner, the first abnormality determination unit is configured to determine that there is a power limitation abnormality by using the adjustment parameter and the maximum powers of the two energy storage systems, including:

[0330] The first abnormality determination unit is configured to:

[0331] If the power adjustment duration of the thermal power unit is greater than or equal to that of the power generation system, calculate the product of the power adjustment difference of the power generation system and a first ratio to obtain a first product, and calculate the difference between the power adjustment of the thermal power unit and the first product to obtain a target power; the first ratio is the ratio of the power adjustment rate of the thermal power unit to the power adjustment rate of the power generation system;

[0332] If the power adjustment duration of the thermal power unit is less than that of the power generation system, calculate the product of the power adjustment difference of the thermal power unit and a second ratio to obtain a second product, and calculate the difference between the second product and the power adjustment difference of the power generation system to obtain a target power; the second ratio is the ratio of the power adjustment rate of the power generation system to the power adjustment rate of the thermal power unit;

[0333] Determine that the target power is not within the power range, and the extreme values of the power range are the maximum powers of the two energy storage systems.

[0334] In a possible implementation, the target operating condition is a special operating condition. Under the special operating condition, during the process that the total power generation of the power generation system reaches the target load, the probability that the operating parameters of the energy storage system exceed the parameter range of the energy storage system is greater than a probability threshold. The device further includes:

[0335] A second abnormality determination unit, configured to output a rate-limited abnormality reminder message.

[0336] In a possible implementation, the device further includes:

[0337] An energy determination unit, configured to determine the energy required for executing the AGC instruction this time by using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit;

[0338] A third abnormality determination unit, configured to determine that there is a capacity-limited abnormality and output a capacity-limited abnormality reminder message if it is determined that the energy is not within the energy range.

[0339] In a possible implementation, the target operating condition indicates to call the thermal energy storage system and the endothermic energy storage system. The energy determination unit is specifically configured to calculate the first energy of the exothermic energy storage system and the second energy of the endothermic energy storage system respectively by using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit;

[0340] The third abnormality determination unit is configured to determine that the energy is not within the energy range, including:

[0341] The third abnormality determination unit is configured to determine that the first energy is not within the energy range of the exothermic energy storage system, or the second energy is not within the energy range of the endothermic energy storage system.

[0342] In a possible implementation, the target operating condition indicates to call the thermal energy storage system or the endothermic energy storage system. The energy determination unit is specifically configured to calculate a third energy by using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit, where the third energy is the energy of the energy storage system indicated to be called by the target operating condition;

[0343] The third abnormality determination unit is configured to determine that the third energy is not within the energy range of the energy storage system indicated to be called by the target operating condition.

[0344] Based on the method embodiment provided above, a method for determining the operating condition of a power generation system is provided. An embodiment of the present application also provides a device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the method for determining the operating condition of a power generation system as described in any one of the above is implemented.

[0345] Based on the method embodiment provided above, a method for determining the operating condition of a power generation system is provided. An embodiment of the present application also provides a computer-readable storage medium. Instructions are stored in the computer-readable storage medium. When the instructions are run on a terminal device, the terminal device is caused to execute the method for determining the operating condition of a power generation system as described in any one of the above.

[0346] It should be noted that the various embodiments in this specification are described in a progressive manner. The key point of each embodiment is to describe the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the systems or devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple. For the relevant parts, reference can be made to the description in the method part.

[0347] It should be understood that in the present application, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the association relationship of associated objects and indicates that three relationships can exist. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist at the same time. Among them, A and B can be singular or plural. The character " / " generally means that the associated objects before and after are in an "or" relationship. "At least one (one)" or its similar expression means any combination of these items, including any combination of single item (one) or plural items (ones). For example, at least one (one) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0348] It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0349] The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be implemented directly in hardware, in a software module executed by a processor, or in a combination thereof. The software module may be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0350] The foregoing description of the disclosed embodiments enables those skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for determining an operating condition of a power generation system, characterized in that: The power generation system comprises a thermal power unit and two energy storage systems, wherein the two energy storage systems comprise a heat release energy storage system and a heat absorption energy storage system, and the method comprises: Obtaining system parameters and automatic generation control (AGC) instructions of the power generation system, wherein the system parameters include the total power generation of the power generation system, the power generation of the thermal power unit, the power adjustment rate of the power generation system, and the power adjustment rate of the thermal power unit; the AGC instruction is used to indicate the target load to which the total power of the power generation system needs to be adjusted; Determine adjustment parameters by using the system parameters and the target load, wherein the adjustment parameters include a power adjustment difference of the power generation system, a power adjustment difference of the thermal power unit, a power adjustment duration of the power generation system, and a power adjustment duration of the thermal power unit; According to one or more of the positive and negative values ​​of the parameters and the size relationships between the parameters included in the adjustment parameters, a target operating condition is determined from preset candidate operating conditions, and the target operating condition is used to indicate a power adjustment method for the two energy storage systems so as to achieve the total power generation of the power generation system reaching the target load.

2. The method according to claim 1, characterized in that Determining the target operating condition from preset candidate operating conditions according to one or more of the positive and negative values ​​of the parameters and the magnitude relationship between the parameters included in the adjustment parameters includes: The candidate operating condition corresponding to the condition determination condition satisfied by the adjustment parameter is determined as the target operating condition, wherein the condition determination condition corresponding to the candidate operating condition includes one or more of the positive and negative values ​​of the parameters included in the preset adjustment parameter and the size relationship between the parameters.

3. The method according to claim 1, characterized in that The candidate operating conditions include normal operating conditions; under the normal operating conditions, when the total power generation power of the power generation system reaches the target load, the operating parameters of the energy storage system are within the parameter range of the energy storage system; Determining the target operating condition from preset candidate operating conditions according to one or more of the positive and negative values ​​of the parameters and the magnitude relationship between the parameters included in the adjustment parameters includes: If the power adjustment difference of the power generation system is 0, the target operating condition is determined to be the first condition, and the first condition is used to indicate that one of the two energy storage systems is selected to adjust the power according to the power adjustment difference of the thermal power unit, or the power is not adjusted; If the power adjustment difference of the power generation system is equal to the power adjustment difference of the thermal power unit, the target operating condition is determined to be the second condition, wherein the second condition includes the target load being in an ascending stage and a descending stage, and the second condition is used to indicate that the heat release energy storage system is called to adjust the power in the ascending stage, and the heat absorption energy storage system is called to adjust the power in the descending stage; If the power adjustment difference of the power generation system and the power adjustment difference of the thermal power unit have the same sign, and the power adjustment duration of the thermal power unit is greater than or equal to the power adjustment duration of the power generation system, determine the magnitude relationship between the power adjustment difference of the power generation system and 0; If the power adjustment difference of the power generation system is greater than 0, it is determined that the target operating condition is a load increase condition, wherein the load increase condition is a condition in which the target load is in an increasing stage, and the load increase condition is used to indicate that at least the heat release energy storage system is called to adjust the power; If the power adjustment difference of the power generation system is less than 0, it is determined that the target operating condition is a load reduction condition, and the load reduction condition is a condition in which the target load is in a decreasing stage. The load reduction condition is used to indicate that at least the heat absorption energy storage system is called to adjust the power.

4. The method according to claim 3, characterized in that Determining the target operating condition as a load increase condition includes: If the power adjustment difference of the thermal power unit is greater than the power adjustment difference of the power generation system, the target operating condition is determined to be the third condition, and the third condition is used to indicate that the heat release energy storage system is called to adjust the power; If the power adjustment difference of the thermal power unit is less than the power adjustment difference of the power generation system, the target operating condition is determined to be the fourth condition, and the fourth condition is used to instruct the heat absorption energy storage system and the heat release energy storage system to adjust power in sequence.

5. The method according to claim 3, characterized in that: Determining the target operating condition as a load reduction condition includes: If the power adjustment difference of the thermal power unit is greater than the power adjustment difference of the power generation system, the target operating condition is determined to be the fifth condition, and the fifth condition is used to instruct to call the heat release energy storage system and the heat absorption energy storage system to adjust the power in sequence; If the power adjustment difference of the thermal power unit is less than the power adjustment difference of the power generation system, the target operating condition is determined to be the sixth condition, and the sixth condition is used to instruct to call the thermal energy storage system to adjust the power.

6. The method according to claim 1, characterized in that The candidate operating conditions include special operating conditions; under the special operating conditions, in the process of the total power generation of the power generation system reaching the target load, the probability that the operating parameters of the energy storage system exceed the parameter range of the energy storage system is greater than a probability threshold; Determining the target operating condition from preset candidate operating conditions according to one or more of the positive and negative values ​​of the parameters and the magnitude relationship between the parameters included in the adjustment parameters includes: If the power adjustment difference of the power generation system and the power adjustment difference of the thermal power unit are of opposite signs, determining the magnitude relationship between the power adjustment difference of the power generation system and 0; If the power adjustment difference of the power generation system is greater than 0, it is determined that the target operating condition is the seventh condition, the seventh condition is the condition in the target load rising stage, and the seventh condition is used to indicate calling the heat absorption energy storage system to adjust the power; If the power adjustment difference of the power generation system is less than 0, the target operating condition is determined to be the eighth condition, the eighth condition is the condition in the target load reduction stage, and the eighth condition is used to instruct to call the heat release energy storage system to adjust the power; If the power adjustment difference of the power generation system and the power adjustment difference of the thermal power unit have the same sign, and the power adjustment duration of the thermal power unit is shorter than the power adjustment duration of the power generation system, determine the magnitude relationship between the power adjustment difference of the power generation system and 0; If the power adjustment difference of the power generation system is greater than 0, it is determined that the target operating condition is the ninth condition, the ninth condition is the condition in the target load rising stage, and the ninth condition is used to indicate calling the heat absorption energy storage system to adjust the power; If the power adjustment difference of the power generation system is less than 0, the target operating condition is determined to be the tenth condition, and the tenth condition is the condition of the target load reduction stage. The tenth condition is used to indicate calling the heat release energy storage system to adjust the power.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: respectively obtaining the maximum power of the two energy storage systems; If the adjustment parameter and the maximum powers of the two energy storage systems are used to determine that a power limitation anomaly occurs, power limitation anomaly reminder information is output.

8. The method according to claim 7, characterized in that The determining that a power limitation abnormality occurs by using the adjustment parameter and the maximum power of the two energy storage systems includes: If the power adjustment duration of the thermal power unit is greater than or equal to the power adjustment duration of the power generation system, the product of the power adjustment difference of the power generation system and the first ratio is calculated to obtain the first product, and the difference between the power adjustment of the thermal power unit and the first product is calculated to obtain the target power; the first ratio is the ratio of the power adjustment rate of the thermal power unit to the power adjustment rate of the power generation system; If the power adjustment time of the thermal power unit is less than the power adjustment time of the power generation system, the product of the power adjustment difference of the thermal power unit and the second ratio is calculated to obtain the second product, and the difference between the second product and the power adjustment difference of the power generation system is calculated to obtain the target power; the second ratio is the ratio of the power adjustment rate of the power generation system to the power adjustment rate of the thermal power unit; It is determined that the target power is not within a power range, and an extreme value of the power range is a maximum power of the two energy storage systems.

9. The method according to any one of claims 1 to 6, characterized in that: The target operating condition is a special operating condition. Under the special operating condition, in the process where the total power generation power of the power generation system reaches the target load, the probability that the operating parameter of the energy storage system exceeds the parameter range of the energy storage system is greater than a probability threshold. The method further includes: Output rate limited exception reminder information.

10. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: Determine the energy required for executing the AGC instruction this time by using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system and the power adjustment difference of the thermal power unit; If it is determined that the energy is not within the energy range, it is determined that a capacity limitation anomaly occurs, and a capacity limitation anomaly reminder message is output.

11. The method according to claim 10, characterized in that The target operating condition indicates calling the thermal energy storage system and the endothermic energy storage system, and utilizing the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit to determine the energy required for executing the AGC instruction this time, including: Calculate the first energy of the heat-releasing energy storage system and the second energy of the heat-absorbing energy storage system respectively by using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system and the power adjustment difference of the thermal power unit; The determining that the energy is not within an energy range includes: It is determined that the first energy is not within an energy range of the heat-releasing energy storage system, or that the second energy is not within an energy range of the heat-absorbing energy storage system.

12. The method according to claim 10, characterized in that The target operating condition indicates calling the thermal energy storage system or the endothermic energy storage system, and utilizing the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system, and the power adjustment difference of the thermal power unit to determine the energy required for executing the AGC instruction this time, including: Calculate a third energy by using the power adjustment rate of the power generation system, the power adjustment rate of the thermal power unit, the power adjustment difference of the power generation system and the power adjustment difference of the thermal power unit, wherein the third energy is the energy of the energy storage system called by the target operating condition indication; The determining that the energy is not within an energy range includes: It is determined that the third energy is not within an energy range of the energy storage system called by the target operating condition indication.

13. A device for determining operating conditions of a power generation system, characterized in that: The power generation system includes a thermal power unit and two energy storage systems, wherein the two energy storage systems include a heat release energy storage system and a heat absorption energy storage system. The device includes: a first acquisition unit, configured to acquire system parameters of the power generation system and an automatic power generation control AGC instruction, wherein the system parameters include the total power generation of the power generation system, the power generation of the thermal power unit, the power adjustment rate of the power generation system, and the power adjustment rate of the thermal power unit; the AGC instruction is configured to indicate the target load to which the total power of the power generation system needs to be adjusted; an adjustment parameter determination unit, configured to determine adjustment parameters by using the system parameters and the target load, wherein the adjustment parameters include a power adjustment difference of the power generation system, a power adjustment difference of the thermal power unit, a power adjustment duration of the power generation system, and a power adjustment duration of the thermal power unit; An operating condition determination unit is used to determine a target operating condition from preset candidate operating conditions based on one or more of the positive and negative values ​​of the parameters included in the adjustment parameters and the size relationship between the parameters, wherein the target operating condition is used to indicate a power adjustment method for the two energy storage systems so that the total power generation power of the power generation system reaches the target load.

14. A device for determining the operating condition of a power generation system, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for determining an operating condition applied to a power generation system as described in any one of claims 1 to 12 is implemented.

15. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed on a terminal device, the terminal device executes the method for determining the operating condition applied to a power generation system as described in any one of claims 1 to 12.

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