Reverse locking control method and device for primary frequency modulation and group control regulation

Abstract

The invention discloses a reverse locking control method and device for primary frequency modulation and group control adjustment. The method comprises the following steps: receiving a current power set value of automatic power generation control of a target unit; when the target power grid frequency is separated from the preset primary frequency modulation dead zone range and the primary frequency modulation action duration is greater than the first preset duration, acquiring a power average value of the target unit in the second preset duration before the primary frequency modulation action; judging the operation state of the target unit based on the current power set value and the power average value to obtain a judgment result; when the judgment result is that the operation state is a reverse locking state, updating a current power set value based on a power average value; and the updated current power set value is adopted to adjust the load of the target unit so as to control the reverse locking state. According to the method, the integral electric quantity of the unit can be increased, the adverse effect caused by reverse adjustment is effectively reduced, and the overall operation efficiency and economical efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the field of pumped-storage power generation control, and particularly to a reverse blocking control method and device for primary frequency modulation and group control regulation. Background Art

[0002] In the application of primary frequency modulation, hydro-generator sets have the characteristics of fast power regulation speed, wide regulation range, high response accuracy, etc., and become an important frequency regulation means in the power grid. When the load fluctuates and the frequency changes, the hydro-generator sets can quickly adjust the power output. Due to the good adjustability of the hydro-generator sets, especially when the water flow conditions permit, it can complete frequency regulation within a short time, providing high real-time support for the power grid, and its stability, reliability and sustainability are superior to thermal power or gas turbine units.

[0003] However, primary frequency modulation always faces some problems in actual applications. Among them, the most urgent problem to be solved is the coordination problem between Automatic Generation Control (AGC) and primary frequency modulation commands. In the AGC plant-wide group control mode, the power set value of the controller is calculated by the group control logic and sent to the unit control unit (Local Control Unit, LCU for short) in a unit minute cycle, and then sent by the LCU to the governor for execution. Since the governor needs a certain time period to complete the previous power set value, if a reverse primary frequency modulation demand occurs during this period, the governor will not be able to respond in time, resulting in the actual load change demand of the power grid being exactly opposite to the AGC command direction, and the governor performs reverse regulation. In addition, when the plant-wide load change is large, it is easy to cause the primary frequency modulation action direction to be inconsistent with the AGC command direction, especially during the process of adjusting the load of the generating unit to cooperate with the start and stop of other units, this phenomenon is more frequent and will cause serious regulation deviation. Summary of the Invention

[0004] In view of this, the present invention provides a reverse blocking control method and device for primary frequency modulation and group control regulation, mainly aiming to solve the problems of insufficient coordination between the current primary frequency modulation function and the AGC command, and the increase in the operating cost of the unit due to reverse primary frequency modulation behavior.

[0005] To solve the above problems, the present application provides a reverse blocking control method for primary frequency modulation and group control regulation, including:

[0006] Receiving the current power set value of the automatic generation control of the target unit;

[0007] When the target grid frequency deviates from the predetermined primary frequency regulation dead zone range and the primary frequency regulation action duration is greater than the first preset duration, obtain the average power of the target unit in the second preset duration before the primary frequency regulation action;

[0008] Based on the current power set value and the average power, judge the operating state of the target unit to obtain a judgment result;

[0009] When the judgment result is that the operating state is the reverse blocking state, update the current power set value based on the average power;

[0010] Adjust the load of the target unit using the updated current power set value to control the reverse blocking state.

[0011] Optionally, the step of when the target grid frequency deviates from the predetermined primary frequency regulation dead zone range and the primary frequency regulation action duration is greater than the first preset duration, obtaining the average power of the target unit in the second preset duration before the primary frequency regulation action specifically includes:

[0012] When the target grid frequency is higher than the upper limit value of the preset primary frequency regulation dead zone and the primary frequency regulation action duration is greater than the first preset duration, obtain the average power of the target unit in the second preset duration before the primary frequency regulation action;

[0013] When the target grid frequency is lower than the lower limit value of the preset primary frequency regulation dead zone and the primary frequency regulation action duration is greater than the first preset duration, obtain the average power of the target unit in the second preset duration before the primary frequency regulation action.

[0014] Optionally, the method further includes:

[0015] When the target grid frequency deviates from the predetermined primary frequency regulation dead zone range and the primary frequency regulation action duration is less than the first preset duration, adjust the load of the target unit based on the current power set value.

[0016] Optionally, the step of when the judgment result is that the operating state is the reverse blocking state, updating the current power set value to the average power specifically includes:

[0017] When the target grid frequency is higher than the upper limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power set value is greater than the average power, update the current power set value to the average power;

[0018] When the target grid frequency is lower than the preset primary frequency regulation dead zone lower limit, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is less than the power average value, the current power setting value is updated to the power average value.

[0019] Optionally, after adjusting the load of the target unit using the updated current power setting value to control the reverse blocking state, the method further includes:

[0020] When the duration of a frequency regulation action is greater than the first preset duration and less than the third preset duration, the reverse locking state of the automatic power generation control of the target unit is maintained for the third preset duration;

[0021] When the primary frequency regulation action duration is greater than the third preset duration and the target grid frequency recovers to within the predetermined primary frequency regulation dead zone, the reverse locking state of the automatic power generation control of the target unit is released.

[0022] Optionally, the method further includes:

[0023] When the target grid frequency is higher than the preset primary frequency regulation dead zone upper limit, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is less than the power average value, the load of the target unit is adjusted based on the current power setting value.

[0024] Optionally, the method further includes:

[0025] When the target grid frequency is lower than the preset primary frequency regulation dead zone lower limit, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is greater than the power average value, the load of the target unit is adjusted based on the current power setting value.

[0026] To solve the above problems, the present application provides a reverse locking control device with primary frequency modulation and group control regulation, comprising:

[0027] A receiving module, used to receive the current power setting value of the target unit's automatic power generation control;

[0028] An acquisition module is configured to acquire the power average value of the target unit for a second preset time period before the primary frequency regulation action when the target grid frequency is out of the predetermined primary frequency regulation dead zone and the primary frequency regulation action duration is greater than a first preset time period;

[0029] a judgment module, configured to judge the operating state of the target unit based on the current power setting value and the power average value, and obtain a judgment result;

[0030] An update module, configured to update the current power set value to the average power value when the judgment result indicates that the operating state is in a reverse blocking state;

[0031] A control module, configured to adjust the load of the target unit by using the updated current power set value to control the reverse blocking state.

[0032] To solve the above problems, the present application provides a storage medium storing a computer program, and when the computer program is executed by a processor, the steps of the above-mentioned reverse blocking control method for primary frequency modulation and group control adjustment are implemented.

[0033] To solve the above problems, the present application provides an electronic device including at least a memory and a processor. A computer program is stored on the memory, and when the processor executes the computer program on the memory, the steps of the above-mentioned reverse blocking control method for primary frequency modulation and group control adjustment are implemented.

[0034] The beneficial effects in the present application: The present application fully considers the mutual influence and characteristics between AGC actions and primary frequency modulation actions, and proposes a control strategy for reverse blocking AGC regulation in primary frequency modulation. At the moment when reverse blocking occurs, the average actual power value in the second preset duration before the unit's primary frequency modulation is used as the reference value for load setting. This not only helps to increase the integral power of the unit, but also can effectively reduce the adverse effects caused by reverse regulation, and improve the overall operation efficiency and economy.

[0035] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following specifically describes the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered as limiting the present invention. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0037] Figure 1 A flowchart showing a reverse blocking control method for primary frequency modulation and group control adjustment provided by an embodiment of the present application;

[0038] Figure 2 A flowchart showing another reverse blocking control method for primary frequency modulation and group control adjustment provided by an embodiment of the present application;

[0039] Figure 3 It shows the load adjustment schematic diagram when the duration of the primary frequency regulation action is less than the first preset duration in the embodiment of the present application;

[0040] Figure 4 It shows the load adjustment schematic diagram when the duration of the primary frequency regulation action is greater than the first preset duration but less than the third preset duration in the embodiment of the present application;

[0041] Figure 5 It shows the load adjustment schematic diagram when the duration of the primary frequency regulation action is greater than the third preset duration in the embodiment of the present application;

[0042] Figure 6 It shows the structural block diagram of a reverse blocking control device for primary frequency regulation and group control regulation provided in another embodiment of the present application. Detailed implementation manners

[0043] Reference is made herein to the various solutions and features of the present application with reference to the drawings.

[0044] It should be understood that various modifications can be made to the embodiments applied herein. Therefore, the above description should not be regarded as a limitation, but only as an example of the embodiments. Those skilled in the art will think of other modifications within the scope and spirit of the present application.

[0045] The drawings included in the specification and forming a part of the specification show the embodiments of the present application, and together with the general description of the present application given above and the detailed description of the embodiments given below are used to explain the principles of the present application.

[0046] These and other features of the present application will become apparent from the following description of the preferred forms of the embodiments given by way of non - limiting examples with reference to the drawings.

[0047] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art can surely implement many other equivalent forms of the present application.

[0048] When combined with the drawings, the above - mentioned and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description.

[0049] Hereinafter, specific embodiments of the present application are described with reference to the drawings; however, it should be understood that the embodiments applied are only examples of the present application, and it can be implemented in various ways. Well - known and / or repetitive functions and structures are not described in detail to avoid obscuring the present application with unnecessary or redundant details. Therefore, the specific structural and functional details applied herein are not intended to be limiting, but only as a basis for the claims and a representative basis for teaching those skilled in the art to use the present application in substantially any suitable detailed structure in a variety of ways.

[0050] This specification may use phrases such as "in one embodiment", "in another embodiment", "in yet another embodiment", or "in other embodiments", which may all refer to one or more of the same or different embodiments according to the present application.

[0051] An embodiment of the present application provides a reverse blocking control method for primary frequency modulation and group control regulation, as Figure 1 shown, including:

[0052] Step S101: Receive the current power set value of the automatic generation control of the target unit;

[0053] In the specific implementation process of this step, in the AGC plant-wide group control mode, the power set value of the automatic generation controller of the target unit is calculated by the group control logic and sent to the LCU in a cycle of per minute, and then sent by the LCU to the governor for execution. Specifically, according to factors such as the actual demand of the power system and the operating status of the power plant, the current power set value of the entire power plant is calculated in real time.

[0054] Step S102: When the target grid frequency deviates from the predetermined primary frequency modulation dead zone range and the primary frequency modulation action duration is greater than the first preset duration, obtain the average power of the target unit in the second preset duration before the primary frequency modulation action;

[0055] In the specific implementation process of this step, when the target grid frequency is higher than the upper limit value of the preset primary frequency modulation dead zone and the primary frequency modulation action duration is greater than the first preset duration, obtain the average power of the target unit in the second preset duration before the primary frequency modulation action; when the target grid frequency is lower than the lower limit value of the preset primary frequency modulation dead zone and the primary frequency modulation action duration is greater than the first preset duration, obtain the average power of the target unit in the second preset duration before the primary frequency modulation action. Among them, the first preset duration can be 3s, and the first preset duration can be adjusted and configured according to the requirements of the regional power grid dispatching for the primary frequency modulation action parameters; the second preset duration can be 10s, and the second preset duration can be adjusted and configured according to the calculation formula of the regional power grid dispatching for the primary frequency modulation load reference value parameters.

[0056] Step S103: Based on the current power set value and the average power, judge the operating state of the target unit to obtain a judgment result;

[0057] In the specific implementation process of this step, when the target grid frequency is higher than the upper limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is greater than the power average value, the operating state of the target unit is in the reverse blocking state; when the target grid frequency is lower than the lower limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is less than the power average value, the operating state of the target unit is in the reverse blocking state; when the operating state of the target unit is in the reverse blocking state, it is necessary to use the average actual power generation value in the second preset duration before the primary frequency regulation action of the target unit as the reference value for load setting, which not only helps to increase the integral power of the unit, but also can effectively reduce the adverse impact of assessment caused by reverse regulation, reduce the assessment risk, and improve the overall operation efficiency and economy.

[0058] Step S104: When the judgment result is that the operating state is in the reverse blocking state, update the current power setting value based on the power average value;

[0059] In the specific implementation process of this step, when the target grid frequency is higher than the upper limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is greater than the power average value, update the current power setting value to the power average value; when the target grid frequency is lower than the lower limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is less than the power average value, update the current power setting value to the power average value.

[0060] Step S105: Adjust the load of the target unit by using the updated current power setting value to control the reverse blocking state.

[0061] In the specific implementation process of this step, when the judgment result is that the operating state is in the reverse blocking state, give priority to the primary frequency regulation action direction, block the regulation of AGC, and adjust the load of the target unit by using the updated current power setting value.

[0062] This application fully considers the mutual influence and characteristics between the AGC action and the primary frequency regulation action, proposes a control strategy for regulating the AGC with reverse blocking of primary frequency regulation, and at the moment of reverse blocking, uses the average actual power generation value in the second preset duration before the primary frequency regulation of the unit as the reference value for load setting, which not only helps to increase the integral power of the unit, but also can effectively reduce the adverse impact caused by reverse regulation and improve the overall operation efficiency and economy.

[0063] Another embodiment of this application provides another reverse blocking control method for primary frequency regulation and group control regulation, such asFigure 2 As shown, it includes:

[0064] Step S201: Receive the current power set value of the automatic generation control of the target unit;

[0065] In the specific implementation process of this step, in the AGC plant group control mode, the power set value of the automatic generation controller of the target unit is calculated by the group control logic and sent to the LCU in units of minutes, and then sent by the LCU to the governor for execution. Specifically, according to factors such as the actual demand of the power system and the operating status of the power plant, the current power set value of the entire power plant is calculated in real time.

[0066] Step S202: Determine whether the target grid frequency deviates from the predetermined primary frequency regulation dead zone range;

[0067] In the specific implementation process of this step, the upper limit value of the primary frequency regulation dead zone can be 50 + 0.05HZ; the lower limit value of the primary frequency regulation dead zone can be 50 - 0.05HZ; the predetermined primary frequency regulation dead zone range can be the range interval [49.95, 50.05] between the lower limit value of the primary frequency regulation dead zone and the upper limit value of the primary frequency regulation dead zone; in specific applications, the primary frequency regulation dead zone range interval can be set according to actual needs. When the target grid frequency is less than the lower limit value of the primary frequency regulation dead zone or the target grid frequency is greater than the upper limit value of the primary frequency regulation dead zone, the target grid frequency deviates from the predetermined primary frequency regulation dead zone range; when the target grid frequency is greater than or equal to the lower limit value of the primary frequency regulation dead zone and less than or equal to the upper limit value of the primary frequency regulation dead zone, the target grid frequency is within the predetermined primary frequency regulation dead zone range and does not deviate from the predetermined primary frequency regulation dead zone range.

[0068] Step S203: When the target grid frequency deviates from the predetermined primary frequency regulation dead zone range and the primary frequency regulation action duration is less than the first preset duration, adjust the load of the target unit based on the current power set value;

[0069] In the specific implementation process of this step, when the target grid frequency deviates from the predetermined primary frequency regulation dead zone range and the primary frequency regulation action duration is less than the first preset duration, adjust the load of the target unit based on the current power set value, as Figure 3 shown, when the primary frequency regulation action duration is less than the first preset duration of 3 seconds: within this time range, the target unit is not affected by the primary frequency regulation reverse lockout. The target unit can quickly respond to the change of frequency deviation, immediately adjust the load, and will not cause adjustment delay or interruption due to the activation of the lockout mechanism. Therefore, the load change of the unit closely follows the change of frequency deviation, without obvious lag or pause.

[0070] Step S204: When the target grid frequency deviates from the predetermined primary frequency regulation dead zone range and the primary frequency regulation action duration is greater than the first preset duration, obtain the average power of the target unit in the second preset duration before the primary frequency regulation action;

[0071] In the specific implementation process of this step, when the target grid frequency is higher than the upper limit value of the preset primary frequency regulation dead zone and the primary frequency regulation action duration is greater than the first preset duration, obtain the average power of the target unit in the second preset duration before the primary frequency regulation action; when the target grid frequency is lower than the lower limit value of the preset primary frequency regulation dead zone and the primary frequency regulation action duration is greater than the first preset duration, obtain the average power of the target unit in the second preset duration before the primary frequency regulation action. The second preset duration can be 10s, and the second preset duration can be adjusted and configured through the calculation formula of the primary frequency regulation load reference value parameter by the regional power grid dispatching.

[0072] Step S205: When the target grid frequency is higher than the upper limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is less than the average power, adjust the load of the target unit based on the current power setting value;

[0073] In the specific implementation process of this step, when the target grid frequency is higher than the upper limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is less than the average power, the primary frequency regulation action direction is consistent with the AGC regulation direction, and adjust the load of the target unit based on the current power setting value.

[0074] Step S206: When the target grid frequency is lower than the lower limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is greater than the average power, adjust the load of the target unit based on the current power setting value;

[0075] In the specific implementation process of this step, when the target grid frequency is lower than the lower limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is greater than the average power, the primary frequency regulation action direction is consistent with the AGC regulation direction, and adjust the load of the target unit based on the current power setting value.

[0076] Step S207: When the target grid frequency is higher than the upper limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is greater than the average power, update the current power setting value to the average power;

[0077] In the specific implementation process of this step, when the target grid frequency is higher than the upper limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is greater than the average power value, if the primary frequency regulation action direction is inconsistent with the AGC regulation direction, the AGC regulation is blocked, the primary frequency regulation action direction is prioritized, and power compensation is performed on the part that has been regulated by the AGC; the current power setting value is updated to the average power value.

[0078] Step S208: When the target grid frequency is lower than the lower limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is less than the average power value, update the current power setting value to the average power value;

[0079] In the specific implementation process of this step, when the target grid frequency is lower than the lower limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is less than the average power value, if the primary frequency regulation action direction is inconsistent with the AGC regulation direction, the AGC regulation is blocked, the primary frequency regulation action direction is prioritized, and power compensation is performed on the part that has been regulated by the AGC; the current power setting value is updated to the average power value.

[0080] Step S209: Adjust the load of the target unit using the updated current power setting value to control the reverse blocking state;

[0081] In the specific implementation process of this step, when the judgment result is that the operating state is the reverse blocking state, the primary frequency regulation action direction is prioritized, the AGC regulation is blocked, and the load of the target unit is adjusted using the updated current power setting value.

[0082] Step S210: When the primary frequency regulation action duration is greater than the first preset duration and less than the third preset duration, maintain the duration of the reverse blocking state of the target unit's automatic generation control for the third preset duration;

[0083] In the specific implementation process of this step, the third preset duration can be 60s. The third preset duration can be set according to the requirements of the primary frequency regulation action duration of the regional power grid dispatching. When the primary frequency regulation action duration is greater than the first preset duration and less than the third preset duration, maintain the duration of the reverse blocking state of the target unit's automatic generation control for the third preset duration, such as Figure 4As shown in the figure, when the duration of a single frequency regulation action is greater than 3 seconds but less than 60 seconds: within this time interval, the actual load of the unit is not immediately adjusted according to the reverse AGC instruction, but the load is increased or decreased in priority according to the control strategy of the single frequency regulation. The control priority of the single frequency regulation is higher than the AGC instruction to ensure that the grid frequency can be restored first in the case of a large frequency deviation. During this process, the LCU will adjust the load set value according to the predetermined control strategy. Even after the frequency deviation instruction returns to 0, the locking mechanism will still be maintained for 60 seconds, during which time the unit will continue to execute the AGC load increase or decrease instructions. This strategy helps to avoid excessive load fluctuations, thereby maintaining the stable operation of the power grid.

[0084] Step S211: When the primary frequency regulation action duration is greater than the third preset duration and the target grid frequency recovers to within the predetermined primary frequency regulation dead zone, control is performed to release the reverse locking state of the automatic power generation control of the target unit.

[0085] In the specific implementation process of this step, when the duration of the primary frequency regulation action is greater than the third preset duration and the target grid frequency recovers to the predetermined primary frequency regulation dead zone, the reverse locking state of the automatic power generation control of the target unit is released. Figure 5 As shown in the figure, when a frequency modulation action lasts for more than 60 seconds, the actual load of the unit still prioritizes the control strategy of the primary frequency modulation, and does not immediately adjust according to the reverse AGC command. When the frequency deviation command returns to 0, the unit quickly switches back to AGC control mode and continues to execute the corresponding load increase and decrease commands, no longer maintaining the locked state. This shows that after a long frequency modulation action, the unit can quickly return to AGC mode to continue to meet the grid load demand.

[0086] This application fully considers the mutual influence and characteristics between the AGC action and the primary frequency regulation action. At the moment of reverse lockout, the average actual power value of the unit for the second preset time period before the primary frequency regulation is used as the reference value for load setting. This not only helps to increase the integrated power of the unit, but also effectively reduces the adverse effects caused by reverse regulation, improves the overall operating efficiency and economy, and enables the target unit to balance the primary frequency regulation and AGC instructions under different frequency deviations and primary frequency regulation action durations to ensure the stability of the power grid and the flexibility of the unit.

[0087] Another embodiment of the present application provides a reverse locking control device for primary frequency modulation and group control regulation, such as Figure 6 Shown, including:

[0088] Receiving module 1, used to receive the current power setting value of the target unit automatic power generation control;

[0089] An acquisition module 2, configured to obtain the average power of the target unit in a second preset duration before the primary frequency modulation action when the target grid frequency deviates from the predetermined primary frequency modulation dead zone range and the primary frequency modulation action duration is greater than a first preset duration;

[0090] A judgment module 3, configured to judge the operating state of the target unit based on the current power setting value and the average power, and obtain a judgment result;

[0091] An update module 4, configured to update the current power setting value to the average power when the judgment result is that the operating state is a reverse blocking state;

[0092] A control module 5, configured to adjust the load of the target unit by using the updated current power setting value to control the reverse blocking state.

[0093] In a specific implementation process, the acquisition module 2 is specifically configured to: when the target grid frequency is higher than the upper limit value of the preset primary frequency modulation dead zone and the primary frequency modulation action duration is greater than the first preset duration, obtain the average power of the target unit in a second preset duration before the primary frequency modulation action; when the target grid frequency is lower than the lower limit value of the preset primary frequency modulation dead zone and the primary frequency modulation action duration is greater than the first preset duration, obtain the average power of the target unit in a second preset duration before the primary frequency modulation action.

[0094] In a specific implementation process, the device further includes a first adjustment module, and the first adjustment module is specifically configured to: when the target grid frequency deviates from the predetermined primary frequency modulation dead zone range and the primary frequency modulation action duration is less than the first preset duration, adjust the load of the target unit based on the current power setting value.

[0095] In a specific implementation process, the update module 4 is specifically configured to: when the target grid frequency is higher than the upper limit value of the preset primary frequency modulation dead zone, the primary frequency modulation action duration is greater than the first preset duration and the current power setting value is greater than the average power, update the current power setting value to the average power; when the target grid frequency is lower than the lower limit value of the preset primary frequency modulation dead zone, the primary frequency modulation action duration is greater than the first preset duration and the current power setting value is less than the average power, update the current power setting value to the average power.

[0096] During the specific implementation process, the device also includes a reverse locking state adjustment module, which is specifically used to: when the duration of a frequency regulation action is greater than the first preset duration and less than the third preset duration, maintain the duration of the reverse locking state of the automatic power generation control of the target unit to the third preset duration; when the duration of a frequency regulation action is greater than the third preset duration and the target grid frequency recovers to within the predetermined primary frequency regulation dead zone, control the release of the reverse locking state of the automatic power generation control of the target unit.

[0097] During the specific implementation process, the device also includes a load adjustment module, which is specifically used to adjust the load of the target unit based on the current power setting value when the target grid frequency is higher than the preset primary frequency regulation dead zone upper limit, the primary frequency regulation action duration is greater than the first preset duration and the current power setting value is less than the power average value.

[0098] During the specific implementation process, the load regulation module is also used to: when the target grid frequency is lower than the preset lower limit of the primary frequency regulation dead zone, the duration of the primary frequency regulation action is greater than the first preset duration and the current power setting value is greater than the power average value, adjust the load of the target unit based on the current power setting value.

[0099] This application fully considers the mutual influence and characteristics between the AGC action and the primary frequency regulation action. At the moment of reverse lockout, the average actual power value of the unit for the second preset time period before the primary frequency regulation is used as the reference value for load setting. This not only helps to increase the integrated power of the unit, but also effectively reduces the adverse effects caused by reverse regulation, improves the overall operating efficiency and economy, and enables the target unit to balance the primary frequency regulation and AGC instructions under different frequency deviations and primary frequency regulation action durations to ensure the stability of the power grid and the flexibility of the unit.

[0100] Another embodiment of the present application provides a storage medium storing a computer program. When the computer program is executed by a processor, the following method steps are implemented:

[0101] Step 1: receiving the current power setting value of the automatic power generation control of the target unit;

[0102] Step 2: When the target grid frequency is out of the predetermined primary frequency regulation dead zone and the primary frequency regulation action duration is greater than the first preset duration, obtaining the average power value of the target unit for the second preset duration before the primary frequency regulation action;

[0103] Step 3: judging the operating status of the target unit based on the current power setting value and the power average value to obtain a judgment result;

[0104] Step 4: When the judgment result indicates that the operation state is in the reverse blocking state, update the current power setpoint based on the average power value.

[0105] Step 5: Adjust the load of the target unit using the updated current power setpoint to control the reverse blocking state.

[0106] Those of ordinary skill in the art can understand that all or part of the processes of implementing the methods in the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, storage, database, or other medium used in the various embodiments provided in this application can include non-volatile and / or volatile memories. Non-volatile memories can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memories can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0107] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the above division of each functional unit and module is used as an example. In practical applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0108] For the specific implementation process of the above method steps, reference can be made to the embodiments of the reverse blocking control method for any one of the above primary frequency modulation and group control regulations. This embodiment will not be repeated here.

[0109] This application fully considers the mutual influence and characteristics between AGC actions and primary frequency regulation actions. At the moment of reverse blocking, the average actual power value of the target unit in the second preset time period before primary frequency regulation is used as the reference value for load setting. This not only helps to increase the integral power of the unit, but also can effectively reduce the adverse effects caused by reverse regulation, improve the overall operation efficiency and economy, so that the target unit can balance and adjust primary frequency regulation and AGC commands under different frequency deviations and primary frequency regulation action durations, ensuring the stability of the power grid and the flexibility of the unit.

[0110] Another embodiment of this application provides an electronic device, which can be a server. The electronic device includes a processor, a memory, a network interface, and a database connected through a system bus. Among them, the processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes non-volatile and / or volatile storage media and internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The network interface of the electronic device is used to communicate with an external client through a network connection. When the electronic device program is executed by the processor, it realizes the functions or steps on the server side of a reverse blocking control method for primary frequency regulation and group control regulation.

[0111] In one embodiment, an electronic device is provided, which can be a client. The electronic device includes a processor, a memory, a network interface, a display screen, and an input device connected through a system bus. Among them, the processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes non-volatile storage media and internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The network interface of the electronic device is used to communicate with an external server through a network connection. When the electronic device program is executed by the processor, it realizes the functions or steps on the client side of a reverse blocking control method for primary frequency regulation and group control regulation.

[0112] Another embodiment of this application provides an electronic device, at least including a memory and a processor. A computer program is stored on the memory. When the processor executes the computer program on the memory, the following method steps are realized:

[0113] Step 1: Receive the current power setting value of the automatic generation control of the target unit;

[0114] Step 2: When the target power grid frequency deviates from the predetermined primary frequency regulation dead zone range and the primary frequency regulation action duration is greater than the first preset duration, obtain the average power of the target unit in the second preset duration before the primary frequency regulation action;

[0115] Step 3: Determine the operating state of the target unit based on the current power setting value and the average power value, and obtain a determination result;

[0116] Step 4: When the determination result indicates that the operating state is the reverse blocking state, update the current power setting value based on the average power value;

[0117] Step 5: Adjust the load of the target unit using the updated current power setting value to control the reverse blocking state.

[0118] For the specific implementation process of the above method steps, reference can be made to the embodiments of the reverse blocking control method for any one of the above primary frequency modulation and group control regulations. This embodiment will not be repeated here.

[0119] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. A reverse blocking control method for primary frequency regulation and group control regulation, characterized in that, include: Receive the current power setting value of the target unit's automatic power generation control; When the target grid frequency is out of the predetermined primary frequency regulation dead zone and the primary frequency regulation action duration is greater than the first preset duration, obtaining the power average value of the target unit for the second preset duration before the primary frequency regulation action; Determine the operating status of the target unit based on the current power setting value and the power average value, and obtain a determination result; When the judgment result is that the operating state is a reverse blocking state, updating the current power setting value based on the power average value; The updated current power setting value is used to adjust the load of the target unit to control the reverse blocking state.

2. The method according to claim 1, wherein When the target grid frequency is out of the predetermined primary frequency regulation dead zone and the primary frequency regulation action duration is greater than the first preset duration, obtaining the average power value of the target unit for the second preset duration before the primary frequency regulation action specifically includes: When the target grid frequency is higher than the preset primary frequency regulation dead zone upper limit and the primary frequency regulation action duration is longer than the first preset duration, obtaining the average power value of the target unit for the second preset duration before the primary frequency regulation action; When the target grid frequency is lower than the preset lower limit of the primary frequency regulation dead zone and the duration of the primary frequency regulation action is greater than the first preset duration, the power average value of the target unit for the second preset duration before the primary frequency regulation action is obtained.

3. The method according to claim 1, characterized in that, The method further comprises: When the target grid frequency is out of the predetermined primary frequency regulation dead zone and the primary frequency regulation action duration is less than the first preset duration, the load of the target unit is adjusted based on the current power setting value.

4. The method according to claim 1, wherein When the judgment result is that the operating state is the reverse blocking state, updating the current power setting value to the power average value specifically includes: When the target grid frequency is higher than the preset primary frequency regulation dead zone upper limit, the primary frequency regulation action duration is longer than the first preset duration, and the current power setting value is greater than the power average value, updating the current power setting value to the power average value; When the target grid frequency is lower than the preset primary frequency regulation dead zone lower limit, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is less than the power average value, the current power setting value is updated to the power average value.

5. The method according to claim 1, characterized in that After adjusting the load of the target unit using the updated current power setting value to control the reverse blocking state, the method further includes: When the duration of a frequency regulation action is greater than the first preset duration and less than the third preset duration, the reverse locking state of the automatic power generation control of the target unit is maintained for the third preset duration; When the primary frequency regulation action duration is greater than the third preset duration and the target grid frequency recovers to within the predetermined primary frequency regulation dead zone, the reverse locking state of the automatic power generation control of the target unit is released.

6. The method according to claim 1, characterized in that, The method further comprises: When the target grid frequency is higher than the upper limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is less than the average power value, the load of the target unit is adjusted based on the current power setting value.

7. The method according to claim 1, wherein The method further includes: When the target grid frequency is lower than the lower limit value of the preset primary frequency regulation dead zone, the primary frequency regulation action duration is greater than the first preset duration, and the current power setting value is greater than the average power value, the load of the target unit is adjusted based on the current power setting value.

8. A reverse blocking control device for primary frequency regulation and group control adjustment, characterized in that, It includes: A receiving module, configured to receive the current power setting value of the automatic generation control of the target unit; An obtaining module, configured to obtain the average power value of the target unit during a second preset duration before the primary frequency regulation action when the target grid frequency deviates from the predetermined primary frequency regulation dead zone range and the primary frequency regulation action duration is greater than the first preset duration; A judging module, configured to judge the operating state of the target unit based on the current power setting value and the average power value, and obtain a judgment result; An updating module, configured to update the current power setting value to the average power value when the judgment result is that the operating state is a reverse blocking state; A control module, configured to adjust the load of the target unit by using the updated current power setting value to control the reverse blocking state.

9. A storage medium, characterized in that, The storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the reverse blocking control method for primary frequency regulation and group control adjustment according to any one of claims 1-7 above are implemented.

10. An electronic device, characterized in that, It includes at least a memory and a processor. A computer program is stored on the memory, and when the processor executes the computer program on the memory, the steps of the reverse blocking control method for primary frequency regulation and group control adjustment according to any one of claims 1-7 above are implemented.

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