Adaptability test method and system for dynamic multi-frequency difference model library of thermal power AGC regulation

Abstract

The present invention provides a method and system for adaptability testing of a dynamic multi-frequency difference model library for thermal power AGC regulation. The method is applied to a thermal power unit, which includes at least a steam turbine and a boiler. The method comprises: determining selection criteria for a static power model and a steam turbine dynamic coupling static pressure model by accumulating ramp test data; obtaining grid frequency information for the thermal power unit; and, based on the grid frequency information and the selection criteria, retrieving the static power model or the steam turbine dynamic coupling static pressure model to perform adaptability testing on the AGC regulation process of the thermal power unit, thereby obtaining test results. This method achieves an effective balance between computational precision, accuracy, simulation complexity, and simulation speed during the adaptability testing of the AGC regulation process of the thermal power unit.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation units, and in particular to a method and system for testing the adaptability of a thermal power AGC regulation dynamic multi-frequency difference model library. Background Art

[0002] In power grid operations, AGC (Automatic Generation Control) power optimization is a critical component in ensuring stable grid operation and improving power dispatch efficiency. This optimization process relies on a comprehensive understanding and mastery of the AGC dynamic characteristics of all generators, particularly thermal power units. The dynamic response of a thermal power unit is a complex, multivariable, coupled, nonlinear system with significant hysteresis. This complexity makes detailed modeling of thermal processes in power grid simulations extremely challenging. Excessive refinement can lead to the "curse of dimensionality," whereby the computational effort increases dramatically as the complexity of the system model increases, making simulation impractical.

[0003] From a unit's perspective, accurately assessing and understanding their AGC capabilities is crucial for thermal power units' participation in frequency regulation services, day-ahead power markets, and real-time spot market trading decisions. This provides a scientific basis for participating in market bidding, optimizing operational strategies, and ultimately improving economic efficiency.

[0004] According to relevant technologies, there are several main methods in the industry for evaluating and simulating AGC regulation capabilities. The first method allocates the regulation capabilities of the generator set according to its installed capacity, but this method ignores the dynamic characteristics and constraints of the actual operation of the unit, so the accuracy is limited. The second method is based on the external characteristic AGC capability reported by the unit as the input data for optimization. Although the actual capability of the unit is taken into account, the data reported by the unit may be subjective and uncertain, affecting the accuracy of the evaluation. The third method uses the BPA power grid dynamic simulation model. Through simulation, the power dynamic characteristics during the AGC process can be obtained in more detail, providing a more reliable basis for optimization. However, this method also faces the problems of high simulation complexity, large computational complexity, and slow simulation speed. These problems are particularly prominent in large-scale power grid simulation.

[0005] Therefore, finding a method for adaptability testing of the dynamic multi-frequency difference model library for thermal power AGC regulation that strikes a reasonable balance between calculation precision, accuracy, simulation complexity, and simulation speed is a technical challenge that needs to be solved urgently. Summary of the Invention

[0006] The present invention provides a method and system for adaptability testing of a dynamic multi-frequency difference model library for thermal power AGC regulation, which effectively achieves a reasonable balance between calculation precision, accuracy, simulation complexity and simulation speed during the adaptability testing of the AGC regulation process of a thermal power unit.

[0007] The present invention provides a method for testing the adaptability of a dynamic multi-frequency difference model library for AGC regulation of thermal power generation. The method is applied to a thermal power generation unit, wherein the thermal power generation unit includes at least a steam turbine and a boiler. The method comprises: determining, by accumulating ramp test data, a selection criterion for a static power model and a steam turbine dynamic coupling static pressure model, wherein the static power model ignores the adjustment dynamics of the power deviation amount in a CCS steam turbine master control; the steam turbine dynamic coupling static pressure model considers the dynamic change process of the steam turbine and the boiler, so that the steam turbine dynamic coupling static pressure model can reflect the power response of the unit under large frequency disturbances; obtaining grid frequency information of the thermal power generation unit; and based on the grid frequency information and the selection criterion, retrieving the static power model or the steam turbine dynamic coupling static pressure model to perform an adaptability test on the AGC regulation process of the thermal power generation unit to obtain a test result.

[0008] According to the adaptability testing method for the dynamic multi-frequency difference model library of thermal power AGC regulation provided by the present invention, the selection criterion is to call the static power model when the grid frequency does not change significantly, and to call the steam turbine dynamic coupling static pressure model when the grid frequency deviation changes in a step manner; based on the grid frequency information and the selection criterion, the static power model or the steam turbine dynamic coupling static pressure model is called to perform adaptability testing on the AGC regulation process of the thermal power unit to obtain a test result, specifically including: when it is determined based on the grid frequency information that the grid frequency of the thermal power unit does not change significantly, based on the selection criterion, the static power model is called to perform adaptability testing on the AGC regulation process of the thermal power unit to obtain a test result.

[0009] According to the adaptability testing method for the dynamic multi-frequency difference model library of thermal power AGC regulation provided by the present invention, the method also includes: when it is determined based on the grid frequency information that the grid frequency deviation of the thermal power unit has a step change, based on the selection criterion, calling the steam turbine dynamic coupling static pressure model to perform adaptability testing on the AGC regulation process of the thermal power unit to obtain a test result.

[0010] According to the adaptability testing method for the dynamic multi-frequency difference model library of thermal power AGC regulation provided by the present invention, the selection criteria of the static power model and the steam turbine dynamic coupling static pressure model are determined by accumulating climbing test data, specifically including: testing the independent related factors affecting the main steam pressure and power fluctuations of the thermal power unit through the accumulation of climbing test data; when the independent related factors affecting the main steam pressure and power fluctuations of the thermal power unit are determined, determining the selection criteria of the static power model and the steam turbine dynamic coupling static pressure model through data fitting.

[0011] The present invention also provides an adaptability test system for a dynamic multi-frequency difference model library of thermal power AGC regulation. The system is applied to a thermal power unit, which includes at least a steam turbine and a boiler. The system includes: a determination module, which is used to determine the selection criteria of a static power model and a steam turbine dynamic coupling static pressure model through accumulation of climbing test data; an acquisition module, which is used to obtain the grid frequency information of the thermal power unit; and a testing module, which is used to call the static power model or the steam turbine dynamic coupling static pressure model based on the grid frequency information and the selection criteria to perform adaptability testing on the AGC regulation process of the thermal power unit to obtain test results.

[0012] According to the thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system provided by the present invention, the selection criterion is to call the static power model when the grid frequency does not undergo a significant jump, and to call the steam turbine dynamic coupling static pressure model when the grid frequency deviation undergoes a step-like change; the test module adopts the following method to implement, based on the grid frequency information and the selection criterion, calling the static power model or the steam turbine dynamic coupling static pressure model to perform adaptability testing on the AGC regulation process of the thermal power unit, and obtain a test result: when it is determined based on the grid frequency information that the grid frequency of the thermal power unit does not undergo a significant jump, based on the selection criterion, calling the static power model to perform adaptability testing on the AGC regulation process of the thermal power unit to obtain a test result.

[0013] According to the thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system provided by the present invention, the test module is also used to: when it is determined based on the grid frequency information that the grid frequency deviation of the thermal power unit has a step change, based on the selection criterion, call the steam turbine dynamic coupling static pressure model to perform adaptability testing on the AGC regulation process of the thermal power unit to obtain test results.

[0014] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the adaptability testing method for the dynamic multi-frequency difference model library for thermal power AGC regulation as described above is implemented.

[0015] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the adaptability testing method for the dynamic multi-frequency difference model library for thermal power AGC regulation as described in any one of the above is implemented.

[0016] The present invention also provides a computer program product, comprising a computer program, which, when executed by a processor, implements any of the above-mentioned methods for testing the adaptability of a thermal power AGC regulation dynamic multi-frequency difference model library.

[0017] The present invention provides a method and system for adaptability testing of a dynamic multi-frequency difference model library for thermal power AGC regulation, which is applied to a thermal power unit comprising at least a steam turbine and a boiler. The method comprises: accumulating ramp test data to determine selection criteria for a static power model and a turbine dynamic coupling static pressure model, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine master control; the turbine dynamic coupling static pressure model considers the dynamic changes of the steam turbine and boiler so that the turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbances; obtaining grid frequency information for the thermal power unit; and based on the grid frequency information and the selection criteria, retrieving the static power model or the turbine dynamic coupling static pressure model to perform adaptability testing on the thermal power unit's AGC regulation process, thereby obtaining test results. This method achieves an effective balance between computational precision, accuracy, simulation complexity, and simulation speed during adaptability testing of the thermal power unit's AGC regulation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a flow chart of the adaptability testing method of the thermal power AGC regulation dynamic multi-frequency difference model library provided by the present invention.

[0020] Figure 2The present invention provides a flow chart for performing adaptability testing on the AGC regulation process of a thermal power unit based on grid frequency information and selection criteria by calling a static power model or a turbine dynamic coupled static pressure model to obtain test results.

[0021] Figure 3 This is a schematic diagram of the application of the static power model provided by the present invention.

[0022] Figure 4 It is a schematic diagram of the application of the CCS steam turbine master control in the steam turbine dynamic coupled static pressure model provided by the present invention.

[0023] Figure 5 It is a schematic diagram of the application of the steam turbine model in the steam turbine dynamic coupled static pressure model provided by the present invention.

[0024] Figure 6 It is a schematic diagram of the application of the static pressure model in the dynamic coupled static pressure model of the steam turbine provided by the present invention.

[0025] Figure 7 It is a structural diagram of the thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system provided by the present invention.

[0026] Figure 8 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0028] The adaptability test method of the dynamic multi-frequency difference model library for thermal power AGC regulation provided by the present invention can be applied to thermal power units. During the application process, the degree of change in the main steam pressure can be used as a criterion for whether the boiler model is ignored; the degree of main steam flow and power fluctuation can be used as a criterion for whether the steam turbine master control and steam turbine dynamics are ignored. Based on this, the static power model and the steam turbine dynamic coupling static pressure model are extracted. During the application process, based on the grid frequency information and selection criteria, the static power model or the steam turbine dynamic coupling static pressure model is retrieved to perform adaptability testing on the AGC regulation process of the thermal power unit, and the test results are obtained, which can effectively achieve a reasonable balance between calculation precision, accuracy, simulation complexity, and simulation speed.

[0029] It is known from the relevant technology that the model that can be used for AGC dynamic simulation includes the main factors that affect the power response of thermal power units. However, in different research scenarios, the main factors should be retained and the secondary factors should be ignored to achieve model simplification. In the adaptability test method of the thermal power AGC regulation dynamic multi-frequency difference model library provided by the present invention, based on reasonable assumptions, different simplified models are obtained, such as the static power model and the steam turbine dynamic coupling static pressure model, and their applicable scenarios. In the corresponding adaptation scenario, the simplified static power model or the steam turbine dynamic coupling static pressure model is called, which can achieve a reasonable balance between calculation precision, accuracy, simulation complexity, and simulation speed.

[0030] Figure 1 It is a flow chart of the adaptability testing method of the thermal power AGC regulation dynamic multi-frequency difference model library provided by the present invention.

[0031] The following will be combined Figure 1 The process of the adaptability testing method of the thermal power AGC regulation dynamic multi-frequency difference model library provided by the present invention is described.

[0032] In an exemplary embodiment of the present invention, the thermal power AGC regulation dynamic multi-frequency difference model library adaptability test method can be applied to a thermal power unit. Wherein, the thermal power unit may include at least a steam turbine and a boiler. Figure 1 It can be seen that the adaptability testing method of the thermal power AGC regulation dynamic multi-frequency difference model library can include steps 110 to 130, and each step will be introduced below.

[0033] In step 110, the selection criteria for the static power model and the turbine dynamic coupling static pressure model are determined by accumulating ramp test data. The static power model ignores the adjustment dynamics of the power deviation in the CCS turbine master control; the turbine dynamic coupling static pressure model considers the dynamic changes of the turbine and boiler so that the turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbances.

[0034] In one embodiment, the selection criteria for the static power model and the turbine dynamic coupling static pressure model can be determined in advance through the accumulation of ramp test data. The static power model ignores the dynamic adjustment of the power deviation in the CCS turbine master control. The turbine dynamic coupling static pressure model considers the dynamic changes in the turbine and boiler, enabling it to reflect the unit power response under large frequency disturbances. A frequency disturbance greater than a preset frequency disturbance is considered a large frequency disturbance.

[0035] In step 120, the grid frequency information of the thermal power generation unit is obtained.

[0036] In step 130 , based on the grid frequency information and the selection criteria, a static power model or a turbine dynamic coupled static pressure model is retrieved to perform an adaptability test on the AGC regulation process of the thermal power unit to obtain a test result.

[0037] In one embodiment, the grid frequency information of the thermal power generation unit may be obtained. During application, based on the grid frequency information of the thermal power generation unit, it may be determined whether the actual operation scenario of the thermal power generation unit is a scenario in which the power command changes slowly or quickly.

[0038] In another embodiment, based on grid frequency information and selection criteria, a corresponding static power model or a turbine-dynamically coupled static pressure model can be retrieved to perform an adaptability test on the AGC regulation process of the thermal power unit, thereby obtaining test results. In this embodiment, the adaptability test on the AGC regulation process of the thermal power unit is performed using a static power model or a turbine-dynamically coupled static pressure model corresponding to the grid frequency information, thereby achieving a reasonable balance between calculation precision, accuracy, simulation complexity, and simulation speed.

[0039] The present invention provides a method for adaptability testing of a dynamic multi-frequency difference model library for thermal power AGC regulation, which is applied to a thermal power unit comprising at least a steam turbine and a boiler. The method comprises: accumulating ramp test data to determine selection criteria for a static power model and a turbine dynamic coupling static pressure model, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine master control; the turbine dynamic coupling static pressure model considers the dynamic changes of the steam turbine and boiler so that the turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbances; obtaining grid frequency information for the thermal power unit; and based on the grid frequency information and the selection criteria, retrieving the static power model or the turbine dynamic coupling static pressure model to perform adaptability testing on the thermal power unit's AGC regulation process, thereby obtaining test results. This method achieves an effective balance between computational precision, accuracy, simulation complexity, and simulation speed during adaptability testing of the thermal power unit's AGC regulation process.

[0040] Figure 2 The present invention provides a flow chart for performing adaptability testing on the AGC regulation process of a thermal power unit based on grid frequency information and selection criteria by calling a static power model or a turbine dynamic coupled static pressure model to obtain test results.

[0041] The following will be combined Figure 2 The process of adapting the AGC regulation process of the thermal power unit by calling the static power model or the steam turbine dynamic coupling static pressure model based on the grid frequency information and selection criteria and obtaining the test results is explained.

[0042] In an exemplary embodiment of the present invention, the selection criteria are to call the static power model when the grid frequency does not change significantly, and to call the turbine dynamic coupled static pressure model when the grid frequency deviation changes in a step-like manner; wherein, the grid frequency does not change significantly means that the degree of grid frequency change is less than or equal to the preset degree of change. The preset degree of change can be adjusted according to actual conditions and is not specifically limited in this embodiment. Figure 2 It can be seen that based on the grid frequency information and the selection criteria, the static power model or the steam turbine dynamic coupling static pressure model is called to perform adaptability testing on the AGC adjustment process of the thermal power unit to obtain the test results, which can include steps 210 and 220. Each step will be introduced below.

[0043] In step 210, when it is determined based on the grid frequency information that the grid frequency of the thermal power unit has not significantly changed, the static power model is called based on the selection criterion to perform an adaptability test on the AGC adjustment process of the thermal power unit to obtain a test result.

[0044] In one embodiment, when it is detected that the grid frequency of a thermal power unit has not significantly changed—in other words, when it is detected that the power command of the thermal power unit is changing slowly—a static power model can be invoked based on a selection criterion to perform an adaptability test on the AGC regulation process of the thermal power unit and obtain a test result. In this embodiment, by invoking a static power model that matches the current grid frequency information to perform an adaptability test on the AGC regulation process of the thermal power unit, a reasonable balance between computational precision, accuracy, simulation complexity, and simulation speed can be effectively achieved during the adaptability test of the AGC regulation process of the thermal power unit.

[0045] In another embodiment, the static power model ignores the dynamic adjustment of the power deviation in the CCS steam turbine master control. In the static power model, the unit power given by the CCS steam turbine master control is used as the output, wherein, under the CCS steam turbine master control, the input is the automatic power generation control instruction P AGC , frequency deviation Δf And the unit power setting P E , the output is the main steam valve comprehensive valve position instruction c v .

[0046] In one embodiment, when a thermal power unit uses the main steam valve to respond to a frequency modulation, the energy it can release is mainly limited by the boiler's heat storage, while its energy release rate is mainly limited by the steam turbine master control. Assuming that the boiler has sufficient heat storage and the frequency change rate is not large, the dynamics of the steam turbine master control and the steam turbine can be ignored. In other words, the actual power of the unit is not much different from the command power at this time. In the AGC response, the power change of the thermal power unit per minute basically does not exceed 1% of the rated power, and it is relatively easy to maintain the energy balance inside the boiler. In addition, with the buffer of the boiler's heat storage, the unit can also better follow the given power in the steam turbine master control. Therefore, the adjustment dynamics of the power deviation in the CCS steam turbine master control can be ignored, and the input unit power setting is used as the output to obtain a static power model, and the corresponding static power model is called to simulate and test the thermal power unit.

[0047] During the application process, CCS steam turbine master control (such as Figure 4 The input of the AGC instruction is shown as P AGC , frequency deviation Δf and actual power of the unit P E , the output is the main steam valve comprehensive valve position instruction c v It should be noted that the CCS mentioned above stands for Coordinated Control System (CCS).

[0048] In CCS steam turbine master control (such as Figure 4 The specific signal flow in operation is as follows: AGC instruction is superimposed on the frequency modulation power setting to obtain the total power setting of the unit; the total power setting of the unit and the actual power deviation of the unit (which can be obtained according to P E The main steam valve comprehensive valve position base value is obtained by inputting the PI regulator; the main steam valve comprehensive valve position base value is superimposed on the frequency deviation feedforward (which can be obtained by Δf Get) to get the main steam valve comprehensive valve position instruction. Among them, Figure 4 K in f and K r represents the parameter coefficient.

[0049] Figure 3 This is a schematic diagram of the application of the static power model provided by the present invention.

[0050] Combine Figure 3 It can be seen that on the basis of the CCS steam turbine master control, the adjustment dynamics of the power deviation in the CCS steam turbine master control can be ignored, and the input unit power given is taken as the output to obtain the static power model.

[0051] Understandably, the static power model ignores the dynamic processes of thermal power units and does not include output variables other than unit power. Therefore, this model can only be used as an external characteristic model for slow processes. In multi-zone AGC research, if the focus is on system frequency fluctuations, boiler heat storage is often not the primary focus. Furthermore, due to the presence of inertia, system frequency generally does not experience significant jumps, making this model suitable for multi-zone AGC research. This model is more consistent with actual once-through boiler units, and during simulation testing, the effects of power feedback and AGC command speed limits were fully considered.

[0052] In step 220, when it is determined based on the grid frequency information that the grid frequency deviation of the thermal power unit has a step change, based on the selection criterion, the steam turbine dynamic coupling static pressure model is called to perform an adaptability test on the AGC adjustment process of the thermal power unit to obtain the test results.

[0053] In one embodiment, when a step-like change in the grid frequency deviation of a thermal power unit is detected—in other words, when a rapid change in the power command of the thermal power unit is detected—a dynamic coupled static pressure model of the steam turbine can be invoked based on a selection criterion to perform an adaptability test on the AGC regulation process of the thermal power unit and obtain test results. In this embodiment, by invoking a dynamic coupled static pressure model of the steam turbine that matches the current grid frequency information to perform an adaptability test on the AGC regulation process of the thermal power unit, a reasonable balance between computational precision, accuracy, simulation complexity, and simulation speed can be effectively achieved during the adaptability test of the AGC regulation process of the thermal power unit.

[0054] In another embodiment, the turbine dynamic coupled static pressure model considers the dynamic change process of the turbine and the boiler, so that the turbine dynamic coupled static pressure model can reflect the power response of the unit under large frequency disturbances.

[0055] In another embodiment, if the grid frequency changes in a step-like manner, the dynamic process of the unit needs to be considered. The unit dynamics can include the dynamics of the turbine and boiler. However, under the assumption that the boiler has sufficient heat storage, it can be assumed that the change in the unit main steam pressure is not large, making the dynamics of the turbine the dominant factor in the unit power. In this case, the complete CCS steam turbine master control (such as Figure 4 ) and the turbine model (as shown in Figure 5 As shown in Figure 2), the boiler dynamics can be replaced by a static pressure model. The turbine model can be the IEEE standard turbine model. Figure 4 It is a schematic diagram of the application of the CCS steam turbine master control in the steam turbine dynamic coupled static pressure model provided by the present invention. Figure 5This is a schematic diagram of the application of the steam turbine model in the steam turbine dynamic coupled static pressure model provided by the present invention. It should be noted that, Figure 5 An IEEE standard steam turbine model is shown. Figure 5 To elaborate.

[0056] It should be noted that, if we ignore the adjustment process after PID in the boiler master control and only consider the main steam pressure setting value, we can get the static pressure model. Its input is the AGC power instruction P AGC , the output is the boiler main steam pressure P st It is understandable that the static model is not the real boiler main control, but an idealization of the actual main steam pressure control.

[0057] During application, the input of CCS boiler master control can be AGC power instruction P AGC and boiler to measure main steam pressure P st , the output is the coal feeding instruction B , water supply instructions D fw .

[0058] The specific signal flow during CCS boiler master control operation is as follows: the AGC command is converted through F(x) to obtain the main steam pressure setpoint for the corresponding operating condition; the main steam pressure deviation is input into the PID regulator and superimposed with the power command feedforward to obtain the boiler master control command; the boiler master control command is converted into a base coal feed command value, which is then superimposed with the variable load feedforward to obtain the coal feed command. Similarly, the feedwater command is obtained. The main steam pressure setting, F(x), is determined based on the unit's specified sliding pressure curve; and the PID parameters are adaptive to different operating conditions.

[0059] Figure 6 It is a schematic diagram of the application of the static pressure model in the dynamic coupled static pressure model of the steam turbine provided by the present invention.

[0060] Combine Figure 6 It can be seen that based on the CCS boiler master control model, the adjustment process after PID in the boiler master control can be ignored, and only the main steam pressure setting value is considered, then the static pressure model can be obtained as follows: Figure 6 Its input is the AGC power command P AGC , the output is the boiler main steam pressure P st .

[0061] It should be noted that the dynamically coupled static pressure model for steam turbines incorporates the physical and control dynamics of the steam turbine on top of the static power model, enabling it to reflect the unit's power response under large disturbances. Therefore, this model is suitable for multi-region AGC research focused on frequency security, system frequency response (SFR) research, and research on combined thermal and storage secondary frequency regulation. Existing research on the former and the latter generally ignores the impact of main steam pressure, while the combined thermal and storage model focuses on the rapidity of energy storage and can also assume stable main steam pressure. Therefore, all of these scenarios meet the application requirements of the dynamically coupled static pressure model for steam turbines. Specifically, the dynamically coupled static pressure model for steam turbines considers the effects of sliding pressure operation, command speed limit, and power feedback during its application.

[0062] In another exemplary embodiment of the present invention, continuing with the above-mentioned embodiment as an example, determining the selection criteria of the static power model and the turbine dynamic coupled static pressure model by accumulating ramp test data may include the following steps:

[0063] By accumulating ramp test data, we tested the independent related factors that affect the main steam pressure and power fluctuation of thermal power units;

[0064] After determining the independent related factors that affect the main steam pressure and power fluctuation of the thermal power unit, the selection criteria of the static power model and the turbine dynamic coupling static pressure model are determined through data fitting.

[0065] In one embodiment, independent factors influencing main steam pressure and power fluctuations can be tested through accumulated ramp test data, and the selection criteria for the two models can be determined through data fitting. The selection criteria determined by this embodiment can lay the foundation for adaptability testing of the AGC regulation process of the thermal power unit by activating the corresponding static power model or the turbine dynamic coupling static pressure model based on the selection criteria and grid frequency information.

[0066] As described above, the adaptability testing method for the dynamic multi-frequency difference model library of thermal power AGC regulation provided by the present invention is applied to a thermal power unit, which includes at least a steam turbine and a boiler. The method includes: accumulating ramp test data to determine the selection criteria for the static power model and the turbine dynamic coupling static pressure model, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine master control; the turbine dynamic coupling static pressure model considers the dynamic changes of the steam turbine and boiler so that the turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbances; obtaining the grid frequency information of the thermal power unit; based on the grid frequency information and the selection criteria, calling the static power model or the turbine dynamic coupling static pressure model to perform adaptability testing on the AGC regulation process of the thermal power unit, and obtaining test results. This method achieves an effective balance between calculation precision, accuracy, simulation complexity, and simulation speed during the adaptability testing of the AGC regulation process of the thermal power unit.

[0067] The following describes the adaptability test system for the dynamic multi-frequency difference model library of thermal power AGC regulation provided by the present invention. The adaptability test system for the dynamic multi-frequency difference model library of thermal power AGC regulation described below and the adaptability test method for the dynamic multi-frequency difference model library of thermal power AGC regulation described above can refer to each other.

[0068] Figure 7 It is a structural diagram of the thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system provided by the present invention.

[0069] The following will be combined Figure 3 The structure of the thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system provided by the present invention is described.

[0070] In an exemplary embodiment of the present invention, a thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system can be applied to a thermal power unit, which includes at least a steam turbine and a boiler. The system may include a determination module 710, an acquisition module 720, and a test module 730. Each module will be introduced below.

[0071] The determination module 710 may be configured to determine the selection criteria of the static power model and the turbine dynamic coupled static pressure model by accumulating ramp test data;

[0072] The acquisition module 720 may be configured to acquire the grid frequency information of the thermal power generation unit;

[0073] The test module 730 may be configured to retrieve the static power model or the turbine dynamic coupled static pressure model based on the grid frequency information and the selection criteria to perform adaptability testing on the AGC regulation process of the thermal power unit and obtain test results.

[0074] In an exemplary embodiment of the present invention, the selection criterion is to call the static power model when the grid frequency does not change significantly, and to call the turbine dynamic coupled static pressure model when the grid frequency deviation changes in a step-like manner;

[0075] The test module 730 may implement the adaptability test of the AGC adjustment process of the thermal power unit based on the grid frequency information and the selection criterion by calling the static power model or the turbine dynamic coupled static pressure model to obtain the test result by:

[0076] When it is determined based on the grid frequency information that the grid frequency of the thermal power unit has not significantly changed, the static power model is called based on the selection criterion to perform an adaptability test on the AGC adjustment process of the thermal power unit to obtain a test result.

[0077] In an exemplary embodiment of the present invention, the testing module 730 may also be configured to:

[0078] When it is determined based on the grid frequency information that the grid frequency deviation of the thermal power unit has a step change, based on the selection criterion, the steam turbine dynamic coupling static pressure model is called to perform an adaptability test on the AGC adjustment process of the thermal power unit to obtain a test result.

[0079] In an exemplary embodiment of the present invention, the determination module 710 may determine the selection criteria for the static power model and the turbine dynamic coupled static pressure model by accumulating ramp test data in the following manner:

[0080] By accumulating ramp test data, the independent related factors affecting the main steam pressure and power fluctuation of the thermal power unit are tested;

[0081] When independent related factors affecting the main steam pressure and power fluctuation of the thermal power unit are determined, selection criteria for the static power model and the turbine dynamic coupling static pressure model are determined through data fitting.

[0082] Figure 8 An example of a physical structure diagram of an electronic device is shown below. Figure 8As shown, the electronic device may include: a processor 810 , a communication interface 820 , a memory 830 and a communication bus 840 , wherein the processor 810 , the communication interface 820 and the memory 830 communicate with each other via the communication bus 840 . The processor 810 can call the logic instructions in the memory 830 to execute the adaptability test method of the dynamic multi-frequency difference model library of the thermal power AGC regulation. The method is applied to a thermal power unit, which includes at least a steam turbine and a boiler. The method includes: determining the selection criteria of the static power model and the steam turbine dynamic coupling static pressure model through the accumulation of climbing test data, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine main control; the steam turbine dynamic coupling static pressure model considers the dynamic change process of the steam turbine and the boiler, so that the steam turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbances; obtain the grid frequency information of the thermal power unit; based on the grid frequency information and the selection criteria, call the static power model or the steam turbine dynamic coupling static pressure model to perform adaptability test on the AGC regulation process of the thermal power unit to obtain the test results.

[0083] Furthermore, the logic instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product, stored in a storage medium, includes instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0084] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the adaptability testing method of the dynamic multi-frequency difference model library for thermal power AGC regulation provided by the above methods. The method is applied to a thermal power unit, which includes at least a steam turbine and a boiler. The method includes: determining selection criteria for a static power model and a steam turbine dynamic coupling static pressure model through accumulation of ramp test data, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine main control; the steam turbine dynamic coupling static pressure model considers the dynamic change process of the steam turbine and the boiler, so that the steam turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbances; obtaining grid frequency information of the thermal power unit; and based on the grid frequency information and the selection criteria, retrieving the static power model or the steam turbine dynamic coupling static pressure model to perform adaptability testing on the AGC regulation process of the thermal power unit to obtain test results.

[0085] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the adaptability test method of the dynamic multi-frequency difference model library for thermal power AGC regulation provided by the above-mentioned methods. The method is applied to a thermal power unit, which includes at least a steam turbine and a boiler. The method includes: determining the selection criteria of a static power model and a steam turbine dynamic coupling static pressure model through accumulation of ramp test data, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine main control; the steam turbine dynamic coupling static pressure model considers the dynamic change process of the steam turbine and the boiler, so that the steam turbine dynamic coupling static pressure model can reflect the power response of the unit under large frequency disturbance; obtaining the grid frequency information of the thermal power unit; based on the grid frequency information and the selection criteria, calling the static power model or the steam turbine dynamic coupling static pressure model to perform adaptability test on the AGC regulation process of the thermal power unit to obtain a test result.

[0086] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0087] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A thermal power AGC regulation dynamic multi-frequency difference model library adaptability testing method, characterized by: The method is applied to a thermal power generation unit, which includes at least a steam turbine and a boiler, and comprises: By accumulating ramp test data, the selection criteria for the static power model and the turbine dynamic coupling static pressure model are determined. The static power model ignores the dynamic adjustment of the power deviation in the CCS turbine master control. The turbine dynamic coupling static pressure model considers the dynamic changes of the turbine and the boiler, so that the turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbances. The selection criteria are to call the static power model when the grid frequency does not change significantly, and to call the turbine dynamic coupling static pressure model when the grid frequency deviation changes in a step manner. Obtaining grid frequency information of the thermal power unit; Based on the grid frequency information and the selection criterion, the static power model or the steam turbine dynamic coupling static pressure model is retrieved to perform an adaptability test on the AGC regulation process of the thermal power unit to obtain a test result.

2. The thermal power AGC regulation dynamic multi-frequency difference model library adaptability testing method according to claim 1 is characterized in that: The adaptability test of the AGC adjustment process of the thermal power unit is performed by calling the static power model or the steam turbine dynamic coupling static pressure model based on the grid frequency information and the selection criterion to obtain the test result, specifically including: When it is determined based on the grid frequency information that the grid frequency of the thermal power unit has not significantly changed, the static power model is called based on the selection criterion to perform an adaptability test on the AGC adjustment process of the thermal power unit to obtain a test result.

3. The thermal power AGC regulation dynamic multi-frequency difference model library adaptability testing method according to claim 2 is characterized in that: The method further comprises: When it is determined based on the grid frequency information that the grid frequency deviation of the thermal power unit has a step change, based on the selection criterion, the steam turbine dynamic coupling static pressure model is called to perform an adaptability test on the AGC adjustment process of the thermal power unit to obtain a test result.

4. The thermal power AGC regulation dynamic multi-frequency difference model library adaptability testing method according to any one of claims 1 to 3, characterized in that: The selection criteria for the static power model and the turbine dynamic coupled static pressure model are determined by accumulating ramp test data, specifically including: By accumulating ramp test data, the independent related factors affecting the main steam pressure and power fluctuation of the thermal power unit are tested; When independent related factors affecting the main steam pressure and power fluctuation of the thermal power unit are determined, selection criteria for the static power model and the turbine dynamic coupling static pressure model are determined through data fitting.

5. A thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system, characterized by: The system is applied to a thermal power unit, which includes at least a steam turbine and a boiler. The system includes: a determination module, configured to determine, through accumulated ramp test data, selection criteria for a static power model and a steam turbine dynamically coupled static pressure model, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine master control; the steam turbine dynamically coupled static pressure model considers the dynamic changes of the steam turbine and the boiler, so that the steam turbine dynamically coupled static pressure model can reflect the unit power response under large frequency disturbances; the selection criteria are to call the static power model when the grid frequency does not undergo a significant jump, and to call the steam turbine dynamically coupled static pressure model when the grid frequency deviation undergoes a step-like change; An acquisition module, configured to acquire the grid frequency information of the thermal power generating unit; The testing module is used to call the static power model or the steam turbine dynamic coupling static pressure model based on the grid frequency information and the selection criterion to perform adaptability testing on the AGC adjustment process of the thermal power unit to obtain a test result.

6. The thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system according to claim 5 is characterized in that: The test module uses the following method to implement, based on the grid frequency information and the selection criterion, calling the static power model or the turbine dynamic coupled static pressure model to perform adaptability testing on the AGC regulation process of the thermal power unit to obtain the test results: When it is determined based on the grid frequency information that the grid frequency of the thermal power unit has not significantly changed, the static power model is called based on the selection criterion to perform an adaptability test on the AGC adjustment process of the thermal power unit to obtain a test result.

7. The thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system according to claim 6 is characterized in that: The test module is also used to: When it is determined based on the grid frequency information that the grid frequency deviation of the thermal power unit has a step change, based on the selection criterion, the steam turbine dynamic coupling static pressure model is called to perform an adaptability test on the AGC adjustment process of the thermal power unit to obtain a test result.

8. An electronic device comprising 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 adaptability testing method for the thermal power AGC regulation dynamic multi-frequency difference model library as described in any one of claims 1 to 4 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the adaptability testing method for the thermal power AGC regulation dynamic multi-frequency difference model library as described in any one of claims 1 to 4 is implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the adaptability testing method for the thermal power AGC regulation dynamic multi-frequency difference model library as described in any one of claims 1 to 4 is implemented.

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