Frequency modulation control method and device, readable storage medium and electronic equipment

Abstract

The present disclosure relates to a frequency modulation control method, device, readable storage medium and electronic equipment, the method comprising: obtaining a current first rotating speed of a generator set; determining a first dispatching frequency of a power grid according to a current power consumption load of the power grid; obtaining a historical rotating speed corresponding to the first dispatching frequency; in a case where it is determined that the generator set meets a primary frequency modulation control condition according to the first rotating speed and the historical rotating speed, determining a target operating parameter by determining a correction coefficient corresponding to each preset operating parameter of the generator set; and performing primary frequency modulation control according to the target operating parameter.

Description

Technical Field

[0001] This disclosure relates to the field of power grid operation technology, and more specifically, to a frequency regulation control method, apparatus, readable storage medium, and electronic device. Background Technology

[0002] Grid frequency is one of the three major indicators of power quality. It reflects the balance between generator active power and electrical load, and is a crucial control parameter for power system operation. Primary frequency regulation refers to the automatic adjustment of valve openings by the turbine speed control system of the generator set according to changes in grid frequency when the power system frequency deviates from the target frequency. This adjustment aims to regulate active power output and reduce the service provided by the grid frequency deviation.

[0003] Under normal circumstances, the primary frequency regulation power assessment of thermal power units is mostly concentrated under conditions of small fluctuations in grid frequency. This is because the change in the power target corresponding to the primary frequency regulation of thermal power units is small when the grid frequency fluctuates slightly. The governor system of each unit adjusts the active power of the unit according to the preset "frequency-power" adjustment coefficient to compensate for the imbalance between the grid's power generation and power consumption to a certain extent. However, most thermal power units in China use only one set of fixed adjustment parameters when performing primary frequency regulation. Therefore, due to the influence of adjustment parameter errors and adjustment delays, the actual adjustment amount of primary frequency regulation will have a large gap with the expected target adjustment amount, affecting the regulation quality of primary frequency regulation, and may even produce negative effects contrary to expectations. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this disclosure provides a frequency modulation control method, apparatus, readable storage medium, and electronic device.

[0005] According to a first aspect of the present disclosure, a frequency modulation control method is provided, comprising:

[0006] Obtain the current first rotational speed of the generator set;

[0007] The first dispatch frequency of the power grid is determined based on the current power load of the power grid.

[0008] Obtain the historical rotation speed corresponding to the first scheduling frequency;

[0009] When it is determined that the generator set meets the primary frequency regulation control conditions based on the first rotation speed and the historical rotation speed, the target operating parameters are determined by determining the correction coefficient corresponding to each preset operating parameter of the generator set.

[0010] Based on the target operating parameters, perform a frequency modulation control.

[0011] Optionally, determining whether the generator set meets the primary frequency regulation control conditions based on the first rotational speed and the historical rotational speed includes:

[0012] Based on the historical rotation speed, a first target rotation speed of the generator set is determined, the first target rotation speed including the corresponding rotation speed under the first scheduling frequency;

[0013] The rotation speed error is determined based on the target rotation speed and the second target rotation speed of the generator set; the second target rotation speed is the target rotation speed of the generator set at a predetermined scheduling frequency.

[0014] If the rotational speed error is greater than or equal to the rotational speed error threshold, the generator set is determined to meet the primary frequency regulation control conditions.

[0015] Optionally, determining the correction coefficient corresponding to each preset operating parameter of the generator set includes:

[0016] The load regulated by the generator set is determined based on the rotational speed error.

[0017] The steam flow rate regulated by the generator set is determined based on the load.

[0018] The correction coefficient corresponding to each preset operating parameter of the generator set is determined based on the steam flow rate.

[0019] Optionally, determining the load adjusted by the generator set based on the rotational speed error includes:

[0020] Obtain multiple preset rotational speed error ranges for the generator set;

[0021] Based on the rotational speed error, determine the load function corresponding to each preset rotational speed error range;

[0022] The preset rotational speed error range to which the rotational speed error belongs is determined as the target range;

[0023] The load amount regulated by the generator set is determined based on the load function corresponding to the target range.

[0024] Optionally, the correction coefficients corresponding to the preset operating parameters include:

[0025] The correction coefficients for the turbine control valve opening corresponding to the steam flow rate regulated by the generator set, the correction coefficients for the turbine control valve opening corresponding to the deviation between the turbine main steam pressure and the turbine main steam pressure set value, the correction coefficients for the actual flow rate corresponding to the turbine control valve opening, and the correction coefficients for the actual flow rate corresponding to the main steam pressure under the predetermined turbine control valve opening.

[0026] Optionally, performing a frequency modulation control based on the target operating parameters includes:

[0027] The first system parameters of the primary frequency control system are adjusted according to the target operating parameters to obtain the corrected second system parameters;

[0028] Based on the corrected second system parameters, a frequency modulation control is performed.

[0029] Optionally, after adjusting the operation of the generator set based on the primary frequency regulation control, the method further includes:

[0030] The third scheduling frequency of the power grid is obtained within a preset time period. If the deviation between the third scheduling frequency and the predetermined scheduling frequency is greater than or equal to a preset frequency deviation threshold, the primary frequency regulation control of the power grid is re-executed.

[0031] According to a second aspect of the present disclosure, a frequency modulation control device is provided, comprising:

[0032] The first acquisition module is used to acquire the current first rotational speed of the generator set;

[0033] The first determining module is used to determine the first dispatching frequency of the power grid based on the current power load of the power grid.

[0034] The second acquisition module is used to acquire the historical rotation speed corresponding to the first scheduling frequency;

[0035] The second determining module is used to determine the target operating parameters by determining the correction coefficient corresponding to each preset operating parameter of the generator set when it is determined that the generator set meets the primary frequency regulation control conditions based on the first rotation speed and the historical rotation speed.

[0036] The first control module is used to perform a frequency modulation control based on the target operating parameters.

[0037] Optionally, the second determining module includes:

[0038] The first determining submodule is used to determine the first target rotation speed of the generator set based on the historical rotation speed, wherein the first target rotation speed includes the rotation speed corresponding to the first scheduling frequency;

[0039] The second determining submodule is used to determine the rotation speed error based on the target rotation speed and the second target rotation speed of the generator set; the second target rotation speed is the target rotation speed of the generator set at a predetermined scheduling frequency;

[0040] The third determining submodule is used to determine whether the generator set meets the primary frequency regulation control conditions when the rotational speed error is greater than or equal to the rotational speed error threshold.

[0041] Optionally, the second determining module includes:

[0042] The fourth determining submodule is used to determine the load amount adjusted by the generator set based on the rotational speed error;

[0043] The fifth determining submodule is used to determine the steam flow rate regulated by the generator set based on the load.

[0044] The sixth determining submodule is used to determine the correction coefficient corresponding to each preset operating parameter of the generator set based on the steam flow rate.

[0045] Optionally, the fourth determining submodule is used to obtain multiple preset rotational speed error ranges of the generator set; determine the load function corresponding to each preset rotational speed error range based on the rotational speed error; determine the preset rotational speed error range to which the rotational speed error belongs as the target range; and determine the load amount adjusted by the generator set based on the load function corresponding to the target range.

[0046] Optionally, the correction coefficients corresponding to the preset operating parameters include:

[0047] The correction coefficients for the turbine control valve opening corresponding to the steam flow rate regulated by the generator set, the correction coefficients for the turbine control valve opening corresponding to the deviation between the turbine main steam pressure and the turbine main steam pressure set value, the correction coefficients for the actual flow rate corresponding to the turbine control valve opening, and the correction coefficients for the actual flow rate corresponding to the main steam pressure under the predetermined turbine control valve opening.

[0048] Optionally, the first control module includes:

[0049] The adjustment submodule is used to adjust the first system parameters of the primary frequency modulation control system according to the target operating parameters to obtain the corrected second system parameters;

[0050] The control submodule is used to perform a frequency modulation control based on the corrected second system parameters.

[0051] Optionally, after adjusting the operation of the generator set based on the primary frequency regulation control, the device further includes:

[0052] The second control module is used to acquire the third scheduling frequency of the power grid within a preset time period, and to re-execute the primary frequency regulation control of the power grid if the deviation between the third scheduling frequency and the predetermined scheduling frequency is greater than or equal to a preset frequency deviation threshold.

[0053] According to a third aspect of the present disclosure, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps of the method described in any of the first aspects of the present disclosure.

[0054] According to a fourth aspect of the present disclosure, a vehicle is provided, comprising: a memory having a computer program stored thereon; and a processor for executing the computer program in the memory to implement the steps of the method described in any of the first aspects of the present disclosure.

[0055] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0056] By acquiring the current first rotational speed of the generator set; determining the first dispatching frequency of the power grid based on the current power load; acquiring the historical rotational speed corresponding to the first dispatching frequency; and determining that the generator set meets the primary frequency regulation control conditions based on the first rotational speed and the historical rotational speed, the target operating parameters are determined by determining the correction coefficients corresponding to each preset operating parameter of the generator set; and primary frequency regulation control is performed based on the target operating parameters. In this way, the rotational speed error of the current generator set can be determined based on historical data, and the preset operating parameters of each unit under different operating conditions can be corrected based on the rotational speed error to determine the target operating parameters, thereby performing primary frequency regulation control. This allows for correction of changes in the generator set regulator characteristics and model parameters, avoiding the influence of regulation errors and regulation delays caused by using only a fixed set of regulation parameters during primary frequency regulation, thus improving the accuracy of primary frequency regulation and effectively enhancing the primary frequency regulation performance of the generator set. Attached Figure Description

[0057] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0058] Figure 1 This is a flowchart illustrating a frequency modulation control method according to an exemplary embodiment.

[0059] Figure 2 This is a flowchart of another frequency modulation control method provided in the embodiments of this disclosure.

[0060] Figure 3 This is a structural block diagram of a frequency modulation control device provided in an embodiment of this disclosure.

[0061] Figure 4 yes Figure 3 The illustrated embodiment provides a structural block diagram of a second determining module.

[0062] Figure 5 yes Figure 3 The illustrated embodiment provides a structural block diagram of a second determining module.

[0063] Figure 6 yes Figure 3 The illustrated embodiment provides a structural block diagram of a first control module.

[0064] Figure 7 yes Figure 3 The illustrated embodiment provides a structural block diagram of a frequency modulation control device.

[0065] Figure 8 This is a block diagram illustrating an electronic device according to an exemplary embodiment. Detailed Implementation

[0066] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0067] It should be noted that all actions involving the acquisition of signals, information, or data in this disclosure are carried out in compliance with the relevant data protection laws and policies of the country where the location is situated, and with authorization from the owner of the relevant device.

[0068] Before detailing the specific implementation methods of this disclosure, the application scenario of this disclosure will first be explained. Currently, with the continuous increase in power grid capacity and the gradual implementation of nationwide interconnection of ultra-high voltage power grids, higher requirements are being placed on power grid security. Primary frequency regulation, as one of the important indicators of power supply quality, is extremely important. Therefore, improving the pass rate of primary frequency regulation operation of generator units is particularly important.

[0069] Primary frequency regulation refers to the automatic adjustment of active power output by the turbine speed control system of the generator unit to reduce the frequency deviation caused by load changes in the power grid. This is achieved when the power system frequency deviates from the target frequency. For example, the turbine regulating system and the unit coordination control system utilize the boiler's energy storage to automatically change the valve opening based on changes in the grid frequency, thus altering the generator's power output to adapt to random variations in grid load.

[0070] Under normal circumstances, during primary frequency regulation, the governor systems of each unit adjust the active power of the unit according to a preset "frequency-power" adjustment coefficient to compensate for the imbalance between the grid's generating power and power consumption to a certain extent. However, most thermal power units in China use only one set of fixed adjustment parameters for primary frequency regulation. Therefore, due to adjustment errors caused by adjustment dead zones and adjustment delays, the actual adjustment amount of primary frequency regulation may differ significantly from the expected target adjustment amount, affecting the quality of primary frequency regulation and potentially even producing negative effects contrary to expectations. Furthermore, the signal reference for primary frequency regulation control of generator units is the speed signal, while dispatch assesses primary frequency regulation based on the frequency signal. Theoretically, there is a fixed conversion relationship between speed and frequency signals, but in reality, during dynamic operation of the unit, deviations in signal accuracy and transmission control loops between the speed and frequency signals can cause asynchrony in time and amplitude, also leading to a low primary frequency regulation pass rate.

[0071] To overcome the technical problems existing in the above-mentioned related technologies, this disclosure provides a frequency regulation control method, device, readable storage medium, and electronic device. It can determine the rotational speed error of the current generator set based on historical data, and correct the preset operating parameters of each unit under different operating conditions based on the rotational speed error to determine the target operating parameters, thereby performing primary frequency regulation control. It can correct changes in the characteristics of the unit regulator and model parameters, and avoid the influence of regulation error and regulation delay caused by using only a fixed set of regulation parameters during primary frequency regulation. It can improve the accuracy of primary frequency regulation and effectively improve the primary frequency regulation performance of the unit.

[0072] The present disclosure will now be described in conjunction with specific embodiments.

[0073] Figure 1 This is a flowchart illustrating a frequency modulation control method according to an exemplary embodiment, such as... Figure 1 As shown, the method may include:

[0074] In step S101, the current first rotational speed of the generator set is obtained.

[0075] In some embodiments, real-time process control data of the generator unit under each load segment can be obtained based on real-time status data from the power plant's plant-level monitoring information system (SIS). This real-time process control data determines the generator unit's current first rotational speed. The power plant-level monitoring information system is an information system for real-time management and monitoring of the entire power plant's production process, providing comprehensive optimization services. The aforementioned real-time process control data includes, for example, process control data such as actual rotational speed, load variation, valve opening, main steam pressure, water level, main steam temperature, fuel quantity, actual load, feedwater flow rate, main steam flow rate, coal consumption, and NOx content. The generator unit's current first rotational speed can be determined from this data.

[0076] In step S102, the first dispatch frequency of the power grid is determined based on the current power load of the power grid.

[0077] The first dispatch frequency can be determined based on the current power load of the power grid. Different frequencies have different impacts on various aspects of power supply. Usually, the power grid frequency of a country is fixed, and all manufacturers supplying power equipment to that country and region must manufacture equipment according to this frequency for it to function properly. The power grid frequency in my country is usually 50Hz.

[0078] In some embodiments, the grid frequency can be received by a frequency transmitter installed on an electrical grid frequency cabinet, and the grid frequency can be converted into a current signal, which is then sent to a DCS (distributed control systems). For example, the frequency transmitter may include a frequency transmitter with a grid frequency of 50±1Hz.

[0079] In step S103, the historical rotation speed corresponding to the first scheduling frequency is obtained.

[0080] Optionally, historical primary frequency regulation process control data can be obtained first, for example, by acquiring historical status data from the power plant's System for Monitoring and Information (SIS). This historical primary frequency regulation process control data is status data that the SIS has collected and stored over a long period during the power plant's historical operation, including the rotational speed of the generator units at each moment when no primary frequency regulation was performed and the rotational speed of the generator units at each moment after a primary frequency regulation was performed. Then, based on the first scheduling frequency, the historical rotational speed corresponding to the first scheduling frequency can be determined using the historical primary frequency regulation process control data.

[0081] In step S104, if the generator set meets the primary frequency regulation control conditions based on the first rotation speed and the historical rotation speed, the target operating parameters are determined by determining the correction coefficients corresponding to each preset operating parameter of the generator set.

[0082] In some embodiments, a first target rotational speed of the generator set can be determined firstly based on the historical rotational speed, the first target rotational speed including the rotational speed corresponding to the first scheduling frequency; then, a rotational speed error can be determined based on the first target rotational speed and the second target rotational speed of the generator set; the second target rotational speed is the target rotational speed of the generator set at a predetermined scheduling frequency; and then, if the rotational speed error is greater than or equal to a rotational speed error threshold, it is determined that the generator set meets the primary frequency regulation control conditions.

[0083] For example, the historical rotational speed can refer to the rotational speed of the generator set under the historical primary frequency regulation control at the first scheduling frequency. This historical rotational speed can be used as the first target rotational speed of the generator set at the first scheduling frequency. If an error is found between the first target rotational speed and the first rotational speed, it can be determined that the current generator set needs to be corrected. Then, based on the target rotational speed and the second target rotational speed of the generator set, the rotational speed error is determined. If the rotational speed error is greater than or equal to the rotational speed error threshold, it is determined that the generator set meets the primary frequency regulation control conditions.

[0084] In some embodiments, the load amount regulated by the generator set can be determined based on the rotational speed error. Specifically, multiple preset rotational speed error ranges of the generator set can be obtained first; then, based on the rotational speed error, the load function corresponding to each preset rotational speed error range can be determined; then, the preset rotational speed error range to which the rotational speed error belongs can be determined as the target range; and finally, based on the load function corresponding to the target range, the load amount regulated by the generator set can be determined.

[0085] Next, the steam flow rate of the generator set is determined based on the load; then, the correction coefficient corresponding to each preset operating parameter of the generator set is determined based on the steam flow rate.

[0086] Specifically, the correction coefficients corresponding to the preset operating parameters include: the correction coefficient for the turbine control valve opening corresponding to the steam flow rate regulated by the generator set, the correction coefficient for the turbine control valve opening corresponding to the deviation between the turbine main steam pressure and the turbine main steam pressure set value, the correction coefficient for the actual flow rate corresponding to the turbine control valve opening, and the correction coefficient for the actual flow rate corresponding to the main steam pressure under the predetermined turbine control valve opening.

[0087] In step S105, frequency modulation control is performed based on the target operating parameters.

[0088] In this step, the first system parameters of the primary frequency modulation control system can be adjusted according to the target operating parameters to obtain the corrected second system parameters; then, primary frequency modulation control is performed based on the corrected second system parameters.

[0089] It should be noted that, considering that after adjusting the operation of the generator set based on the primary frequency regulation control, it is necessary to determine whether the primary frequency regulation control is qualified. If it is not qualified, the primary frequency regulation control of the power grid can be re-executed for the generator set. Alternatively, the third dispatch frequency of the power grid can be obtained within a preset time period. If the deviation between the third dispatch frequency and the predetermined dispatch frequency is greater than or equal to the preset frequency deviation threshold, the primary frequency regulation control of the power grid can be re-executed.

[0090] Using the above method, this disclosure can obtain the current first rotational speed of the generator set; determine the first dispatching frequency of the power grid based on the current power load; obtain the historical rotational speed corresponding to the first dispatching frequency; and, if the generator set meets the primary frequency regulation control conditions based on the first rotational speed and the historical rotational speed, determine the target operating parameters by determining the correction coefficients corresponding to each preset operating parameter of the generator set; and perform primary frequency regulation control based on the target operating parameters. In this way, the rotational speed error of the current generator set can be determined based on historical data, and the preset operating parameters of each unit under different operating conditions can be corrected based on the rotational speed error to determine the target operating parameters, thereby performing primary frequency regulation control. This allows for correction of changes in the generator set regulator characteristics and model parameters, avoiding the influence of regulation errors and regulation delays caused by using only a fixed set of regulation parameters during primary frequency regulation, thus improving the accuracy of primary frequency regulation and effectively enhancing the primary frequency regulation performance of the generator set.

[0091] Figure 2 This is a flowchart of another frequency modulation control method provided in this disclosure embodiment, such as... Figure 2 As shown, the method may include:

[0092] In step S201, the current first rotational speed of the generator set is obtained.

[0093] In some embodiments, real-time process control data of the generator unit under each load segment can be obtained based on real-time status data from the power plant's plant-level monitoring information system (SIS). This real-time process control data determines the generator unit's current first rotational speed. The power plant-level monitoring information system is an information system for real-time management and monitoring of the entire power plant's production process, providing comprehensive optimization services. The aforementioned real-time process control data includes, for example, process control data such as actual rotational speed, load variation, valve opening, main steam pressure, water level, main steam temperature, fuel quantity, actual load, feedwater flow rate, main steam flow rate, coal consumption, and NOx content. The generator unit's current first rotational speed can be determined from this data.

[0094] In step S202, the first dispatch frequency of the power grid is determined based on the current power load of the power grid.

[0095] The first dispatch frequency can be determined based on the current power load of the power grid. Different frequencies have different impacts on various aspects of power supply. Usually, the power grid frequency of a country is fixed, and all manufacturers supplying power equipment to that country and region must manufacture equipment according to this frequency for it to function properly. The power grid frequency in my country is usually 50Hz.

[0096] In some embodiments, the grid frequency can be received by a frequency transmitter installed on an electrical grid frequency cabinet, and the grid frequency can be converted into a current signal, which is then sent to a DCS (distributed control systems). For example, the frequency transmitter may include a frequency transmitter with a grid frequency of 50±1Hz.

[0097] In step S203, the historical rotation speed corresponding to the first scheduling frequency is obtained.

[0098] Optionally, historical primary frequency regulation process control data can be obtained first, for example, by acquiring historical status data from the power plant's System for Monitoring and Information (SIS). This historical primary frequency regulation process control data is status data that the SIS has collected and stored over a long period during the power plant's historical operation, including the rotational speed of the generator units at each moment when no primary frequency regulation was performed and the rotational speed of the generator units at each moment after a primary frequency regulation was performed. Then, based on the first scheduling frequency, the historical rotational speed corresponding to the first scheduling frequency can be determined using the historical primary frequency regulation process control data.

[0099] In step S204, a first target rotation speed of the generator set is determined based on the historical rotation speed. The first target rotation speed includes the rotation speed corresponding to the first scheduling frequency.

[0100] In some embodiments, the historical rotation speed may refer to the rotation speed of the generator set under historical primary frequency regulation control at the first scheduling frequency. The historical rotation speed can be used as the first target rotation speed of the generator set at the first scheduling frequency. If an error is found between the first target rotation speed and the first rotation speed, it can be determined that the current generator set needs to be corrected.

[0101] In step S205, the rotation speed error is determined based on the first target rotation speed and the second target rotation speed of the generator set.

[0102] The second target rotational speed is the target rotational speed of the generator set at a predetermined scheduling frequency.

[0103] In this step, if it is determined that the current generator set needs to be calibrated, the rotational speed error between the first target rotational speed and the second target rotational speed of the generator set is calculated. The rotational speed error can refer to the error between the target rotational speed of the generator set at the current first scheduling frequency and the target rotational speed at the predetermined scheduling frequency.

[0104] In step S206, if the rotational speed error is greater than or equal to the rotational speed error threshold, it is determined that the generator set meets the primary frequency regulation control conditions.

[0105] In step S207, the load amount adjusted by the generator set is determined based on the rotational speed error.

[0106] Optionally, multiple preset rotational speed error ranges of the generator set can be obtained first; then, based on the rotational speed error, the load function corresponding to each preset rotational speed error range can be determined; next, the preset rotational speed error range to which the rotational speed error belongs can be determined as the target range; then, based on the load function corresponding to the target range, the load amount regulated by the generator set can be determined.

[0107] Specifically, based on the generator speed operation during primary frequency regulation of the power grid in recent years, over 90% of generator speeds during primary frequency regulation are distributed between ±2 rpm and ±2.6 rpm, with most deviations being small. The frequency regulation power corresponding to ±2.6 rpm is typically ±2.7 MW, and the frequency regulation power corresponding to ±3 rpm is typically ±4.4 MW. Therefore, the majority of the frequency regulation power is between 0-3 MW, which is equivalent to 0.5% Pe for a 600 MW unit. Here, rpm can be an abbreviation for Revolutions Per Minute, representing the number of times the equipment rotates per minute; MW is an abbreviation for megawatt, a unit derived from the order of magnitude of the basic power unit, watt.

[0108] Specifically, the grid frequency is collected by a grid frequency detector. Primary frequency regulation parameters include frequency deviation and the speed unequalization rate of each generator unit. According to the rotor motion equation, when the grid active power is insufficient, the generator rotor accelerates, and the grid frequency increases; conversely, the grid frequency decreases. Therefore, when the grid frequency increases, the turbine rotor speed needs to be reduced, i.e., the steam flow rate and inlet / outlet pressure difference need to be lowered. Conversely, when the grid frequency decreases, the turbine rotor speed needs to be increased, i.e., the steam flow rate and inlet / outlet pressure difference need to be raised. The turbine rotor speed compensation amount is calculated based on the frequency deviation that needs to be compensated or reduced according to the grid frequency. From this, the corresponding steam flow rate or pressure regulation amount can be calculated, i.e., the load regulation amount of the generator unit.

[0109] In step S208, the steam flow rate regulated by the generator set is determined based on the load.

[0110] In step S209, the correction coefficient corresponding to each preset operating parameter of the generator set is determined based on the steam flow rate.

[0111] The correction coefficients corresponding to the preset operating parameters include: the correction coefficient for the turbine control valve opening corresponding to the steam flow rate regulated by the generator set, the correction coefficient for the turbine control valve opening corresponding to the deviation between the turbine main steam pressure and the turbine main steam pressure set value, the correction coefficient for the actual flow rate corresponding to the turbine control valve opening, and the correction coefficient for the actual flow rate corresponding to the main steam pressure under the predetermined turbine control valve opening.

[0112] In step S210, the first system parameters of the primary frequency control system are adjusted according to the target operating parameters to obtain the corrected second system parameters.

[0113] In step S211, frequency modulation control is performed based on the corrected second system parameters.

[0114] Using the above method, this disclosure can determine the rotational speed error of the current generator set based on historical data, and correct the preset operating parameters of each unit under different operating conditions based on the rotational speed error to determine the target operating parameters, thereby performing primary frequency regulation control. This can correct the changes in the characteristics of the unit regulator and the model parameters, avoiding the influence of regulation error and regulation delay caused by using only a fixed set of regulation parameters when performing primary frequency regulation, thus improving the accuracy of primary frequency regulation and effectively improving the primary frequency regulation performance of the unit.

[0115] Figure 3 This is a structural block diagram of a frequency modulation control device provided in an embodiment of this disclosure, such as... Figure 3 As shown, the device includes:

[0116] The first acquisition module 301 is used to acquire the current first rotational speed of the generator set;

[0117] The first determining module 302 is used to determine the first dispatching frequency of the power grid based on the current power load of the power grid.

[0118] The second acquisition module 303 is used to acquire the historical rotation speed corresponding to the first scheduling frequency;

[0119] The second determining module 304 is used to determine the target operating parameters by determining the correction coefficient corresponding to each preset operating parameter of the generator set when it is determined that the generator set meets the primary frequency regulation control conditions based on the first rotation speed and the historical rotation speed.

[0120] The first control module 305 is used to perform a frequency modulation control based on the target operating parameters.

[0121] Figure 4 yes Figure 3 The illustrated embodiment provides a structural block diagram of a second determining module, as shown below. Figure 4 As shown, the second determining module 304 includes:

[0122] The first determining submodule 3041 is used to determine the first target rotation speed of the generator set based on the historical rotation speed, the first target rotation speed including the rotation speed corresponding to the first scheduling frequency;

[0123] The second determining submodule 3042 is used to determine the rotation speed error based on the target rotation speed and the second target rotation speed of the generator set; the second target rotation speed is the target rotation speed of the generator set under a predetermined scheduling frequency;

[0124] The third determining submodule 3043 is used to determine whether the generator set meets the primary frequency regulation control conditions when the rotational speed error is greater than or equal to the rotational speed error threshold.

[0125] Figure 5 yes Figure 3 The illustrated embodiment provides a structural block diagram of a second determining module, as shown below. Figure 5 As shown, the second determining module 304 includes:

[0126] The fourth determining submodule 3044 is used to determine the load amount adjusted by the generator set based on the rotational speed error;

[0127] The fifth determining submodule 3045 is used to determine the steam flow rate regulated by the generator set based on the load.

[0128] The sixth determining submodule 3046 is used to determine the correction coefficient corresponding to each preset operating parameter of the generator set based on the steam flow rate.

[0129] Optionally, the fourth determining submodule 3044 is used to obtain multiple preset rotational speed error ranges of the generator set; determine the load function corresponding to each preset rotational speed error range based on the rotational speed error; determine the preset rotational speed error range to which the rotational speed error belongs as the target range; and determine the load amount adjusted by the generator set based on the load function corresponding to the target range.

[0130] Optionally, the correction coefficients corresponding to the preset operating parameters include:

[0131] The correction coefficients for the turbine control valve opening corresponding to the steam flow rate regulated by the generator set, the correction coefficients for the turbine control valve opening corresponding to the deviation between the turbine main steam pressure and the turbine main steam pressure set value, the correction coefficients for the actual flow rate corresponding to the turbine control valve opening, and the correction coefficients for the actual flow rate corresponding to the main steam pressure under the predetermined turbine control valve opening.

[0132] Figure 6 yes Figure 3 The illustrated embodiment provides a structural block diagram of a first control module, as shown below. Figure 6 As shown, the first control module 305 includes:

[0133] The adjustment submodule 3051 is used to adjust the first system parameters of the primary frequency control system according to the target operating parameters to obtain the corrected second system parameters;

[0134] The control submodule 3052 is used to perform a frequency modulation control based on the corrected second system parameters.

[0135] Figure 7 yes Figure 3 The illustrated embodiment provides a structural block diagram of a frequency modulation control device, as shown below. Figure 7 As shown, after adjusting the operation of the generator set based on the primary frequency regulation control, the device further includes:

[0136] The second control module 306 is used to acquire the third scheduling frequency of the power grid within a preset time period, and to re-execute the primary frequency regulation control of the power grid if the deviation between the third scheduling frequency and the predetermined scheduling frequency is greater than or equal to a preset frequency deviation threshold.

[0137] Using the aforementioned device, the following steps are taken: First, the current first rotational speed of the generator set is acquired; second, the first dispatching frequency of the power grid is determined based on the current power load; third, the historical rotational speed corresponding to the first dispatching frequency is acquired; fourth, if the generator set meets the primary frequency regulation control conditions based on the first and historical rotational speeds, the target operating parameters are determined by determining the correction coefficients corresponding to each preset operating parameter of the generator set; and fifth, primary frequency regulation control is performed based on the target operating parameters. This allows for the determination of the rotational speed error of the current generator set based on historical data, and the correction of the preset operating parameters of each unit under different operating conditions based on the rotational speed error to determine the target operating parameters for primary frequency regulation control. This approach can correct for changes in the generator set regulator characteristics and model parameters, avoiding the adjustment errors and delays caused by using only a fixed set of adjustment parameters during primary frequency regulation. This improves the accuracy of primary frequency regulation and effectively enhances the primary frequency regulation performance of the generator set.

[0138] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0139] Figure 8 This is a block diagram illustrating an electronic device 800 according to an exemplary embodiment. For example... Figure 8 As shown, the electronic device 800 may include a processor 801 and a memory 802. The electronic device 800 may also include one or more of a multimedia component 803, an input / output interface 804, and a communication component 805.

[0140] The processor 801 controls the overall operation of the electronic device 800 to complete all or part of the steps in the aforementioned frequency modulation control method. The memory 802 stores various types of data to support the operation of the electronic device 800. This data may include, for example, instructions for any application or method operating on the electronic device 800, and application-related data such as contact data, sent and received messages, pictures, audio, video, etc. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. Multimedia component 803 may include a screen and an audio component. The screen may be, for example, a touchscreen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in memory 802 or transmitted via communication component 805. The audio component also includes at least one speaker for outputting audio signals. Input / output interface 804 provides an interface between processor 801 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual or physical buttons. Communication component 805 is used for wired or wireless communication between the electronic device 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IoT, eMTC, or other 5G technologies, or combinations thereof, is not limited here. Therefore, the corresponding communication component 805 may include: a Wi-Fi module, a Bluetooth module, an NFC module, etc.

[0141] In an exemplary embodiment, the electronic device 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the frequency modulation control method described above.

[0142] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the frequency modulation control method described above. For example, the computer-readable storage medium may be the memory 802 including program instructions described above, which may be executed by the processor 801 of the electronic device 800 to complete the frequency modulation control method described above.

[0143] In another exemplary embodiment, a computer program product is also provided, the computer program product comprising a computer program executable by a programmable device, the computer program having a code portion for performing the frequency modulation control method described above when executed by the programmable device.

[0144] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and all such simple modifications fall within the protection scope of this disclosure. For example...

[0145] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0146] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A frequency modulation control method characterized by, The method comprises: acquiring a current first rotating speed of a generator set; determining a first dispatch frequency of a power grid according to a current power consumption load of the power grid; acquiring a historical rotating speed corresponding to the first dispatch frequency; in a case where it is determined that the generator set meets a primary frequency modulation control condition according to the first rotating speed and the historical rotating speed, determining a target operating parameter of the generator set by determining a correction coefficient corresponding to each preset operating parameter of the generator set; performing primary frequency modulation control according to the target operating parameter; the acquiring of the historical rotating speed corresponding to the first dispatch frequency comprises: acquiring historical primary frequency modulation process control data; the historical primary frequency modulation process control data comprises a rotating speed of the generator set at each time point when primary frequency modulation is not performed and a rotating speed of the generator set at each time point after primary frequency modulation is performed; determining the historical rotating speed corresponding to the first dispatch frequency according to the first dispatch frequency and the historical primary frequency modulation process control data; the correction coefficient corresponding to the preset operating parameter comprises a correction coefficient of a turbine valve opening degree corresponding to a steam flow rate adjusted by the generator set, a correction coefficient of the turbine valve opening degree corresponding to a deviation value between a main steam pressure of the turbine and a main steam pressure set value of the turbine, a correction coefficient of an actual flow rate corresponding to the turbine valve opening degree, and a correction coefficient of the actual flow rate corresponding to the main steam pressure at a predetermined turbine valve opening degree; the steam flow rate adjusted by the generator set is determined according to a load amount adjusted by the generator set, the load amount adjusted by the generator set is determined according to a rotating speed error, and the rotating speed error is determined according to a first target rotating speed and a second target rotating speed, the first target rotating speed being a rotating speed corresponding to the first dispatch frequency, and the second target rotating speed being a target rotating speed of the generator set at a predetermined dispatch frequency.

2. The method of claim 1, wherein, the determining of the primary frequency modulation control condition according to the first rotating speed and the historical rotating speed comprises: determining a first target rotating speed of the generator set according to the historical rotating speed; determining a rotating speed error according to the target rotating speed and a second target rotating speed of the generator set; in a case where the rotating speed error is greater than or equal to a rotating speed error threshold value, determining that the generator set meets the primary frequency modulation control condition.

3. The method of claim 2, wherein, the determining of the correction coefficient corresponding to each preset operating parameter of the generator set comprises: determining a load amount adjusted by the generator set according to the rotating speed error; determining a steam flow rate adjusted by the generator set according to the load amount; determining the correction coefficient corresponding to each preset operating parameter of the generator set according to the steam flow rate.

4. The method of claim 2, wherein, the determining of the load amount adjusted by the generator set according to the rotating speed error comprises: acquiring a plurality of preset rotating speed error ranges of the generator set; determining a load function corresponding to each preset rotating speed error range according to the rotating speed error; determining a target range to which the rotating speed error belongs; determining the load amount adjusted by the generator set according to the load function corresponding to the target range.

5. The method of claim 1, wherein, The primary frequency control according to the target operation parameter comprises: adjusting a first system parameter of a primary frequency control system according to the target operation parameter to obtain a second system parameter after correction; performing primary frequency control according to the second system parameter after correction.

6. The method according to any one of claims 1-5, characterized in that, After adjusting the operation of the generator set based on the primary frequency control, the method further comprises: acquiring a third dispatching frequency of the power grid within a preset time period, and re-executing the primary frequency control of the power grid in a case where a deviation between the third dispatching frequency and the predetermined dispatching frequency is greater than or equal to a preset frequency deviation threshold.

7. A frequency modulation control device, characterized by comprising: comprise: a first acquisition module configured to acquire a first rotating speed of a generator set; a first determination module configured to determine a first dispatching frequency of a power grid according to a current power consumption load of the power grid; a second acquisition module configured to acquire a historical rotating speed corresponding to the first dispatching frequency; a second determination module configured to, in a case where it is determined that the generator set satisfies a primary frequency control condition according to the first rotating speed and the historical rotating speed, determine a target operation parameter by determining a correction coefficient corresponding to each preset operation parameter of the generator set; a control module configured to perform primary frequency control according to the target operation parameter; the acquisition of the historical rotating speed corresponding to the first dispatching frequency comprises: acquiring historical primary frequency control process data; the historical primary frequency control process data comprises a rotating speed of the generator set at each time point when primary frequency control is not performed and a rotating speed of the generator set at each time point after primary frequency control is performed; determining the historical rotating speed corresponding to the first dispatching frequency according to the first dispatching frequency and the historical primary frequency control process data; the correction coefficient corresponding to the preset operation parameter comprises a correction coefficient of a turbine valve opening degree corresponding to a steam flow rate adjusted by the generator set, a correction coefficient of the turbine valve opening degree corresponding to a deviation value between a turbine main steam pressure and a turbine main steam pressure set value, a correction coefficient of an actual flow rate corresponding to the turbine valve opening degree, and a correction coefficient of an actual flow rate corresponding to the main steam pressure at a predetermined turbine valve opening degree; the steam flow rate adjusted by the generator set is determined according to a load amount adjusted by the generator set, the load amount adjusted by the generator set is determined according to a rotating speed error, and the rotating speed error is determined according to a first target rotating speed and a second target rotating speed, the first target rotating speed being a rotating speed corresponding to the first dispatching frequency, and the second target rotating speed being a target rotating speed of the generator set at a predetermined dispatching frequency.

8. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by a processor to implement the steps of the method of any one of claims 1-6.

9. An electronic device, comprising: comprise: a memory having a computer program stored thereon; a processor configured to execute the computer program in the memory to implement the steps of the method of any one of claims 1-6.

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