Primary frequency modulation method and device for power grid of thermal power generating unit, medium, equipment and product

Abstract

The invention relates to a thermal power generating unit power grid primary frequency modulation method and device, a medium, equipment and a product. The method comprises the following steps: in response to a received primary frequency modulation instruction, obtaining a unit output average value of a thermal power unit in a preset time period before the current moment; adjusting the primary frequency modulation instruction by using the unit output average value to obtain an optimized primary frequency modulation instruction; triggering a primary frequency modulation process of a power grid of the thermal power generating unit through the optimized primary frequency modulation instruction; wherein in the primary frequency modulation process, the reverse adjustment action of the thermal power generating unit is forbidden. Therefore, the influence of the actual output fluctuation of the thermal power generating unit on the primary frequency modulation effect is reduced by performing front feedback adjustment on the primary frequency modulation instruction, and the frequency modulation precision is improved; moreover, the reverse adjustment action is forbidden in the primary frequency modulation process, and the primary frequency modulation action is ensured to be preferentially controlled, so that the frequency modulation speed is improved, the primary frequency modulation quality is improved, and the examination qualification rate is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of frequency regulation of thermal power generation units, and in particular to a method, device, medium, equipment and product for primary frequency regulation of a power grid of a thermal power generation unit. Background Art

[0002] Primary frequency regulation refers to the automatic control process in which the control system of the unit in the power grid automatically controls the increase or decrease of the unit's active power when the frequency of the power grid deviates from the rated value, limits the change of the power grid frequency, and maintains a stable power grid frequency. When the power grid frequency increases, the primary frequency regulation function requires the unit to use its heat storage to quickly reduce the load, and vice versa, the unit quickly increases the load.

[0003] In related technologies, thermal power units usually increase the main steam pressure correction, increase the local inequality rate of the unit and other measures on the original primary frequency regulation logic to improve the primary frequency regulation performance, but the frequency regulation quality is still difficult to meet the performance assessment requirements of primary frequency regulation. Summary of the invention

[0004] The main purpose of the present invention is to provide a method, device, medium, equipment and product for primary frequency regulation of a power grid of a thermal power unit, aiming to solve the above technical problems.

[0005] According to a first aspect of an embodiment of the present disclosure, a method for primary frequency regulation of a power grid of a thermal power generation unit is provided, comprising: In response to receiving a frequency modulation instruction, obtaining an average output value of the thermal power unit in a preset time period before the current moment; The primary frequency modulation instruction is adjusted by using the average output value of the unit to obtain an optimized primary frequency modulation instruction; The optimized primary frequency regulation instruction is used to trigger the primary frequency regulation process of the power grid of the thermal power unit; wherein, during the primary frequency regulation process, the reverse regulation action of the thermal power unit is prohibited.

[0006] Optionally, obtaining the average output value of the thermal power unit in a preset time period before the current moment includes: Obtain the frequency difference load corresponding to the thermal power unit at each moment in the preset time period; The valve flow rate corresponding to each moment of the thermal power unit within the preset time period is obtained by converting the frequency difference load; The unit output value corresponding to each moment in the preset time period is calculated according to the frequency difference load and the valve flow, and the unit output average value is calculated.

[0007] Optionally, the adjusting the primary frequency modulation instruction by using the average output value of the unit includes: When the unit output value corresponding to the current moment is less than the unit output average value, increasing the actual output value of the thermal power unit at the current moment according to the difference between the unit output average value and the unit output value; According to the actual output value, the primary frequency modulation instruction is adjusted.

[0008] Optionally, the preset time period is 10 seconds.

[0009] Optionally, the process of triggering a primary frequency regulation process of the power grid of the thermal power generation unit by using the optimized primary frequency regulation instruction includes: In response to receiving the optimized primary frequency modulation instruction, detecting a frequency difference between an actual frequency and a rated frequency of the power grid of the thermal power generating unit; When the frequency difference exceeds the preset dead zone range, a frequency modulation signal is generated; The power grid is subjected to primary frequency modulation according to the primary frequency modulation signal.

[0010] Optionally, the actual frequency is the actual rotation speed of the DEH system side of the thermal power unit, and the preset dead zone range is 3000±2RPM.

[0011] Optionally, the method further comprises: A frequency regulation process is assisted by a triple redundant high-precision frequency difference controller; wherein the triple redundant high-precision frequency difference controller is used to measure the grid frequency difference of the thermal power unit, and the grid frequency difference is used to calculate the frequency difference load of the thermal power unit.

[0012] According to a second aspect of an embodiment of the present disclosure, a primary frequency regulation device for a power grid of a thermal power generation unit is provided, comprising: An acquisition module is configured to, in response to receiving a frequency modulation instruction, acquire an average output value of the thermal power unit in a preset time period before the current moment; an optimization module, configured to adjust the primary frequency modulation instruction by using the average output value of the unit to obtain an optimized primary frequency modulation instruction; The frequency regulation module is configured to trigger a primary frequency regulation process of the power grid of the thermal power unit through the optimized primary frequency regulation instruction; wherein, during the primary frequency regulation process, the reverse regulation action of the thermal power unit is prohibited.

[0013] According to a third aspect of an embodiment of the present disclosure, a non-temporary computer-readable storage medium is provided, on which a computer program is stored. When the program is executed by a processor, the steps of the primary frequency regulation method of the thermal power grid provided in the first aspect of the present disclosure are implemented.

[0014] According to a fourth aspect of an embodiment of the present disclosure, there is provided an electronic device, including: a memory having a computer program stored thereon; A processor is used to execute the computer program in the memory to implement the steps of the primary frequency regulation method of the thermal power grid provided in the first aspect of the present disclosure.

[0015] According to a fifth aspect of an embodiment of the present disclosure, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the steps of the primary frequency regulation method for a thermal power grid provided in the first aspect of the present disclosure.

[0016] The above-mentioned technical scheme proposed in the embodiment of the present disclosure performs forward feedback adjustment on the primary frequency modulation instruction through the average output of the thermal power unit within a preset time period to obtain an optimized primary frequency modulation instruction, and then uses the optimized primary frequency modulation instruction to trigger the primary frequency modulation process of the power grid of the thermal power unit. In this way, the influence of the actual output fluctuation of the thermal power unit on the primary frequency modulation effect is reduced by optimizing the primary frequency modulation instruction, thereby improving the frequency modulation accuracy; and, in the primary frequency modulation process, reverse adjustment action is prohibited to ensure that the primary frequency modulation action is controlled first to increase the frequency modulation speed, thereby improving the primary frequency regulation quality and improving the assessment pass rate.

[0017] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 The present invention is a flow chart showing a method for primary frequency regulation of a power grid of a thermal power generation unit according to an exemplary embodiment.

[0019] Figure 2 The diagram is a schematic diagram showing a primary regulation priority control process of a thermal power unit according to an exemplary embodiment.

[0020] Figure 3 The diagram is a schematic diagram showing a primary frequency regulation instruction optimization process of a thermal power unit according to an exemplary embodiment.

[0021] Figure 4 The present invention is a block diagram of a primary frequency regulation device for a power grid of a thermal power generation unit according to an exemplary embodiment.

[0022] Figure 5 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0023] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0024] It should be noted that all actions of acquiring signals, information or data in the present disclosure are carried out in compliance with the relevant data protection laws and policies of the location and with the authorization given by the owner of the corresponding device.

[0025] Primary frequency regulation refers to the automatic control process in which the control system of the unit in the power grid automatically controls the increase or decrease of the unit's active power when the frequency of the power grid deviates from the rated value, limits the change of the power grid frequency, and maintains a stable power grid frequency. When the power grid frequency increases, the primary frequency regulation function requires the unit to use its heat storage to quickly reduce the load, and vice versa, the unit quickly increases the load.

[0026] In a frequency modulation process, the digital electro-hydraulic control system (DEH) and the modulating control system (MCS) of the thermal power unit each undertake different tasks and work together to ensure that the unit can respond quickly and accurately to changes in the grid frequency. Specifically, the DEH system is mainly responsible for the regulation and control of the steam turbine, for example: real-time monitoring of the grid frequency, and judging whether frequency modulation is required according to the preset frequency modulation strategy; calculating and adjusting the opening of the steam turbine valve according to the frequency deviation and power compensation signal, because the change of the valve opening affects the steam flow of the steam turbine, so as to adjust the output power of the generator, etc. The MCS system is mainly responsible for power control and coordination of the work of various subsystems, for example: real-time calculation of the deviation between the grid frequency and the rated frequency, and determination of the power compensation amount according to the preset frequency modulation strategy; generating corresponding power instructions according to the frequency deviation and power compensation amount, and sending them to the DEH system; coordinating the load distribution between multiple units to ensure the stability of the grid frequency, etc.

[0027] Among the related technologies, the research direction and adjustment measures of primary frequency regulation technology are mainly to add main steam pressure correction to the original primary frequency regulation logic of DEH system and MCS system, increase the local inequality rate of the unit, etc., but there are still problems such as the network frequency measurement accuracy does not meet the requirements, the probability of unit primary frequency regulation refusal and malfunction is relatively high, and the qualified rate of small frequency difference action of primary frequency regulation is low. As the primary frequency regulation performance assessment of thermal power units is becoming more and more stringent, the above adjustment measures are difficult to meet the current assessment requirements.

[0028] In addition, multiple assessments will also increase assessment costs and affect the economic benefits of thermal power units.

[0029] To this end, the present disclosure provides a method, device, medium, equipment and product for primary frequency regulation of a power grid of a thermal power unit. The specific implementation methods of the present disclosure are described in detail below in conjunction with the accompanying drawings.

[0030] Figure 1 FIG. 1 is a flow chart showing a method for primary frequency regulation of a power grid of a thermal power plant according to an exemplary embodiment. Figure 1 As shown, the primary frequency regulation method of the power grid of a thermal power unit can be used in the control terminal of the thermal power unit, including the following S101-S103.

[0031] In S101, in response to receiving a frequency modulation instruction, an average output value of the thermal power unit in a preset time period before the current moment is obtained.

[0032] In one embodiment of the present disclosure, as described above, the DEH system of the thermal power unit can monitor the grid frequency in real time, and determine whether a frequency modulation action is required according to a preset frequency modulation strategy. If a frequency modulation action is required, a frequency modulation instruction can be generated. When receiving a frequency modulation instruction, this embodiment will obtain the average unit output of the thermal power unit within a time interval (i.e., a preset time period) before the current moment.

[0033] The preset time period may be set by the management personnel of the thermal power unit according to work experience. In some embodiments, the preset time period may be 10 seconds.

[0034] In S102, the primary frequency regulation instruction is adjusted using the average output value of the unit to obtain an optimized primary frequency regulation instruction.

[0035] In one embodiment of the present disclosure, the frequency modulation amplitude can be appropriately increased or decreased according to the average output value of the unit, that is, the primary frequency modulation instruction is feedforward compensated to obtain the optimized primary frequency modulation instruction. In this way, by adjusting the original primary frequency modulation instruction, the influence of the actual output fluctuation of the thermal power unit on the primary frequency modulation effect can be reduced, the frequency modulation accuracy can be improved, and then the primary frequency modulation quality can be improved.

[0036] In S103, the primary frequency regulation process of the power grid of the thermal power unit is triggered by optimizing the primary frequency regulation instruction.

[0037] In one embodiment of the present disclosure, after obtaining the optimized primary frequency modulation instruction, a primary frequency modulation is performed according to the optimized primary frequency modulation instruction. The specific primary frequency modulation process may include: adjusting the opening of the steam turbine valve according to the optimized primary frequency modulation instruction, changing the steam flow of the steam turbine, etc., which will not be described in detail in this application.

[0038] At the same time, during the above-mentioned frequency regulation process, reverse regulation of thermal power units is prohibited.

[0039] In one embodiment of the present disclosure, a primary frequency regulation action is set to have priority control, that is, a reverse regulation action opposite thereto is prohibited. In this way, the response speed of the primary frequency regulation can be improved, thereby reducing frequency fluctuations, maintaining grid stability, and further improving the quality of the primary frequency regulation.

[0040] Specifically, the change direction of the load instruction (i.e., increasing the load or reducing the load) can be limited to prevent a large load mutation after a frequency modulation action; the change in the adjustment direction of the power regulator (i.e., increasing the valve opening or reducing the valve opening) can also be limited to prevent a large reverse deviation at the power regulator inlet before a frequency modulation action, causing the adjustment direction of the power regulator to be inconsistent with the direction of the primary frequency modulation action.

[0041] Next, combine Figure 2 The priority control process of a frequency modulation action is described in detail. Figure 2 is a schematic diagram showing a primary regulation priority control process of a thermal power unit according to an exemplary embodiment. Figure 2 As shown, in the MCS system of the thermal power unit, the power regulation is a closed-loop control. Specifically, the MCS system receives a load instruction from the power grid dispatching center or the load control system and inputs it into the rate controller. The rate controller calculates the rate of power change according to the load instruction and the current power output to smooth the power change process. In this process, the control logic of "primary frequency regulation prohibited to increase" and "primary frequency regulation prohibited to reduce" is set to ensure that during the primary frequency regulation action, the load instruction of the thermal power unit will not change in the opposite direction. That is to say, if the load instruction indicates that the current primary frequency regulation needs to increase the load, the instruction to reduce the load will be prohibited; if the load instruction indicates that the current primary frequency regulation needs to reduce the load, the instruction to increase the load will be prohibited.

[0042] Next, the power regulator receives the output signal of the rate controller, adjusts the valve opening adjustment signal of the turbine according to this signal, and inputs the signal to the DEH system so that the DEH system converts the signal into a hydraulic signal, thereby controlling the valve opening of the turbine. In this process, the control logic of "primary frequency regulation is prohibited to increase" and "primary frequency regulation is prohibited to decrease" is set to ensure that during the primary frequency regulation action, the turbine valve opening adjustment direction of the thermal power unit will not change in the opposite direction. That is to say, if the power regulator indicates that the current primary frequency regulation needs to increase the valve opening of the turbine, the instruction to reduce the valve opening will be prohibited; if the power regulator indicates that the current primary frequency regulation needs to reduce the valve opening of the turbine, the instruction to increase the valve opening will be prohibited.

[0043] In some embodiments, during the primary frequency regulation process, if the preset conditions are met, the reverse regulation action of the thermal power unit is prohibited. The preset conditions may be: no restriction on manual load increase or decrease by the operator; no restriction on automatic or prohibited load increase or decrease under abnormal conditions of the unit, etc. In this way, the primary frequency regulation action can be given priority control under the premise of ensuring the safe operation of the thermal power unit, thereby improving the response speed of the primary frequency regulation and thus improving the quality of the primary frequency regulation.

[0044] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by using the average output value of the thermal power unit within a preset time period, a primary frequency modulation instruction is adjusted by forward feedback to obtain an optimized primary frequency modulation instruction, and then the optimized primary frequency modulation instruction is used to trigger the primary frequency modulation process of the power grid of the thermal power unit. In this way, the influence of the actual output fluctuation of the thermal power unit on the primary frequency modulation effect is reduced by optimizing the primary frequency modulation instruction, thereby improving the frequency modulation accuracy; and, in the primary frequency modulation process, reverse adjustment actions are prohibited to ensure that the primary frequency modulation action is controlled with priority to increase the frequency modulation speed, thereby improving the primary frequency modulation quality and improving the assessment pass rate.

[0045] As an optional implementation, obtaining the average unit output of the thermal power unit in a preset time period before the current moment in S101 may include: obtaining the frequency difference load corresponding to the thermal power unit at each moment in the preset time period; obtaining the valve flow corresponding to the thermal power unit at each moment in the preset time period according to the frequency difference load; calculating the unit output value corresponding to each moment in the preset time period according to the frequency difference load and the valve flow, and calculating the average unit output.

[0046] In one embodiment of the present disclosure, the frequency difference load refers to the load that the thermal power unit needs to adjust additionally due to the deviation of the grid frequency. For example, if the grid frequency is low, the thermal power unit needs to increase the output power to restore the frequency, and the increased power is the frequency difference load. Specifically, the grid frequency can be monitored and recorded in real time by the MCS system, and then the frequency difference load is calculated based on the difference between the grid frequency and the rated frequency at each moment in a preset time period, that is, the frequency difference. For example, the frequency difference can be converted into the corresponding frequency difference load by a graded inequality rate.

[0047] Valve flow refers to the steam flow corresponding to the opening of the turbine valve, which directly affects the output power of the turbine. For example, if the valve opening increases, the valve flow will also increase, thereby increasing the output power of the unit, that is, increasing the unit output value. Specifically, the valve flow corresponding to each frequency difference load can be determined by the power regulator of the MCS system, and then the unit output value corresponding to each moment can be calculated based on the frequency difference load and valve flow at each moment. The unit output value is the actual output power of the thermal power unit at a certain moment. Then, the average value of the output values ​​of each unit within the above-mentioned preset time period is calculated to obtain the average unit output value. The calculation method of the valve flow and the unit output value can be implemented in an appropriate manner in the relevant technology, and the embodiments of the present disclosure will not be repeated here.

[0048] As an optional implementation, adjusting the primary frequency modulation instruction using the average unit output value in S102 may include: when the unit output value corresponding to the current moment is less than the unit output average value, increasing the actual output value of the thermal power unit at the current moment according to the difference between the unit output average value and the unit output value; and adjusting the primary frequency modulation instruction according to the actual output value.

[0049] In one embodiment of the present disclosure, the unit output value at the current moment is compared with the above-mentioned unit output average value. If the unit output value at the current moment is smaller, it indicates that before the primary frequency modulation action is performed, that is, in the preset time period before the current moment, the unit output is in a decreasing stage. According to the difference between the unit output value and the unit output average value, the actual output value is increased. In this way, the primary frequency modulation instruction is adjusted according to the higher actual output value, and the optimized primary frequency modulation instruction is higher than the original primary frequency modulation instruction, so that the actual primary frequency modulation effect is enhanced. In this way, the influence of the primary frequency modulation effect caused by the difference between the unit output fluctuation direction and the primary frequency modulation action direction can be reduced, the frequency modulation accuracy can be improved, and the grid frequency can be quickly stabilized.

[0050] Specifically, the sum of half of the difference and the unit output value at the current moment can be determined as the actual output value of the thermal power unit at the current moment.

[0051] Next, combine Figure 3 The optimization process of a frequency modulation instruction is described in detail. Figure 3 FIG. 1 is a schematic diagram showing a frequency regulation instruction optimization process of a thermal power unit according to an exemplary embodiment. Figure 3 As shown in the figure, a frequency modulation command is received at time A1. At this time, the average output of the thermal power unit within 10 seconds before time A1 (i.e., the time interval from A0 to A1) is the value corresponding to point a. According to Figure 3It can be seen that before executing the primary frequency modulation action, the unit output is in the decreasing stage. In this case, the primary frequency modulation instruction is a positive action, and the actual unit output needs to be adjusted upward. At this time, the unit output fluctuation direction is opposite to the primary frequency modulation action. If the primary frequency modulation is performed based on the original unit output value L2 corresponding to the moment A1, it will result in a low primary frequency modulation amplitude, affecting the frequency modulation effect. In this embodiment, half of the difference between the average unit output and L2 is added on the basis of L2, that is, the actual output value at the moment A1 is increased to L1, and then the original primary frequency modulation instruction is fed back control according to the actual output value L1 to obtain the optimized primary frequency modulation instruction for subsequent primary frequency modulation.

[0052] As an optional implementation, the process of triggering the primary frequency modulation of the power grid of the thermal power unit by optimizing the primary frequency modulation instruction in S103 may include: in response to receiving the optimized primary frequency modulation instruction, detecting the frequency difference between the actual frequency and the rated frequency of the power grid of the thermal power unit; generating a primary frequency modulation signal when the frequency difference exceeds a preset dead zone range; and performing primary frequency modulation on the power grid according to the primary frequency modulation signal.

[0053] In one embodiment of the present disclosure, the dead zone range refers to the range in which the frequency difference is allowed to fluctuate, and a frequency modulation will be triggered if the frequency difference exceeds the range. Specifically, when the optimized frequency modulation instruction is received, the actual frequency of the power grid is detected in real time by means of power grid frequency monitoring equipment and other methods, and the actual frequency is subtracted from the rated frequency to obtain the frequency difference, and then the frequency difference is compared with the dead zone range of the primary frequency modulation, and a frequency modulation signal is generated when the frequency difference exceeds the dead zone of the primary frequency modulation, and the signal is used to perform a primary frequency modulation on the power grid.

[0054] In this way, the disturbance value within the dead zone can be shielded, frequent frequency modulation operations caused by small frequency fluctuations can be avoided, the load fluctuations of the unit and the power grid can be reduced, and the stability of the power grid operation can be improved. In addition, the damage caused by the frequent operation of the unit's high valves due to network frequency interference can be avoided, thereby improving the safety and reliability of the unit.

[0055] As an optional implementation, the actual frequency is the actual rotation speed of the DEH system side of the thermal power unit, and the preset dead zone range can be set to 3000±2RPM according to the equipment model, service life, and work experience of the management personnel of the thermal power unit.

[0056] As an optional implementation, the above method also includes: assisting a frequency regulation process through a triple redundant high-precision frequency difference controller; wherein the triple redundant high-precision frequency difference controller is used to measure the grid frequency difference of the thermal power unit, and the grid frequency difference is used to calculate the frequency difference load of the thermal power unit.

[0057] In one embodiment of the present disclosure, a triple redundant high-precision frequency difference controller is electrically connected to the DEH system and the MCS system. The triple redundant high-precision frequency difference controller has a measurement accuracy of more than 0.01% for small frequency differences of the power grid, and can achieve precise control of frequency difference conversion. This solves the problem of unit primary frequency regulation refusal and malfunction caused by insufficient measurement accuracy of the network frequency measuring instrument of the MCS system, improves the primary frequency regulation control accuracy, and thus improves the quality of primary frequency regulation.

[0058] Figure 4 FIG. 1 is a block diagram of a primary frequency regulation device for a thermal power generation unit power grid according to an exemplary embodiment. Figure 4 As shown, the primary frequency regulation device 400 of the thermal power generation unit power grid may include an acquisition module 401 , an optimization module 402 and a frequency regulation module 403 .

[0059] The acquisition module 401 is configured to, in response to receiving a frequency modulation instruction, acquire an average output value of the thermal power unit in a preset time period before the current moment; The optimization module 402 is configured to adjust the primary frequency modulation instruction by using the average output value of the unit to obtain an optimized primary frequency modulation instruction; The frequency regulation module 403 is configured to trigger a primary frequency regulation process of the power grid of the thermal power unit through the optimized primary frequency regulation instruction; wherein, during the primary frequency regulation process, the reverse regulation action of the thermal power unit is prohibited.

[0060] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: by using the average output value of the thermal power unit within a preset time period, a primary frequency modulation instruction is adjusted by forward feedback to obtain an optimized primary frequency modulation instruction, and then the optimized primary frequency modulation instruction is used to trigger the primary frequency modulation process of the power grid of the thermal power unit. In this way, the influence of the actual output fluctuation of the thermal power unit on the primary frequency modulation effect is reduced by optimizing the primary frequency modulation instruction, thereby improving the frequency modulation accuracy; and, in the primary frequency modulation process, reverse adjustment actions are prohibited to ensure that the primary frequency modulation action is controlled with priority to increase the frequency modulation speed, thereby improving the primary frequency modulation quality and improving the assessment pass rate.

[0061] Optionally, the acquisition module 401 includes: A frequency difference load acquisition submodule is configured to acquire the frequency difference load corresponding to the thermal power unit at each moment within the preset time period; A valve flow acquisition submodule is configured to obtain the valve flow corresponding to each moment of the thermal power unit within the preset time period according to the frequency difference load conversion; The average value acquisition submodule is configured to calculate the unit output value corresponding to each moment in the preset time period according to the frequency difference load and the valve flow, and calculate the unit output average value.

[0062] Optionally, the optimization module 402 includes: The output value adjustment submodule is configured to increase the actual output value of the thermal power unit at the current moment according to the difference between the average output value of the unit and the output value of the unit when the output value of the unit corresponding to the current moment is less than the average output value of the unit; The instruction adjustment submodule is configured to adjust the primary frequency modulation instruction according to the actual output value.

[0063] Optionally, the preset time period is 10 seconds.

[0064] Optionally, the frequency modulation module 403 includes: a difference detection submodule, configured to detect a frequency difference between an actual frequency and a rated frequency of the power grid of the thermal power generation unit in response to receiving the optimized primary frequency modulation instruction; The signal generation submodule is configured to generate a primary frequency modulation signal when the frequency difference exceeds a preset dead zone range; The primary frequency modulation submodule is configured to perform primary frequency modulation on the power grid according to the primary frequency modulation signal.

[0065] Optionally, the actual frequency is the actual rotation speed of the DEH system side of the thermal power unit, and the preset dead zone range is 3000±2RPM.

[0066] Optionally, the thermal power unit power grid primary frequency modulation device 400 further includes: The auxiliary module is configured to assist a frequency regulation process through a triple redundant high-precision frequency difference controller; wherein the triple redundant high-precision frequency difference controller is used to measure the grid frequency difference of the thermal power unit, and the grid frequency difference is used to calculate the frequency difference load of the thermal power unit.

[0067] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0068] The present disclosure also provides a non-temporary computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps of the primary frequency regulation method of the thermal power grid provided by the present disclosure are implemented.

[0069] Figure 5 FIG. 5 is a block diagram of an electronic device 500 according to an exemplary embodiment. Figure 5 As shown, the electronic device 500 may include: a processor 501 , a memory 502 . The electronic device 500 may also include one or more of a multimedia component 503 , an input / output (I / O) interface 504 , and a communication component 505 .

[0070] The processor 501 is used to control the overall operation of the electronic device 500 to complete all or part of the steps in the above-mentioned method for primary frequency modulation of the power grid of a thermal power unit. The memory 502 is used to store various types of data to support the operation of the electronic device 500, and these data may include, for example, instructions for any application or method used to operate on the electronic device 500, and application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 502 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, magnetic disk or optical disk. The multimedia component 503 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone, which is used to receive external audio signals. The received audio signal may be further stored in the memory 502 or sent through the communication component 505. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 504 provides an interface between the processor 501 and other interface modules, and the above-mentioned other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 505 is used for wired or wireless communication between the electronic device 500 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 505 may include: Wi-Fi module, Bluetooth module, NFC module, etc.

[0071] In some embodiments, the electronic device 500 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned primary frequency regulation method of the thermal power unit power grid.

[0072] In addition, in one embodiment, the embodiment of the present disclosure further provides a computer-readable storage medium including program instructions, and when the program instructions are executed by the processor, the steps of the above-mentioned method for primary frequency regulation of the power grid of a thermal power plant are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 502 including program instructions, and the above-mentioned program instructions can be executed by the processor 501 of the electronic device 500 to complete the above-mentioned method for primary frequency regulation of the power grid of a thermal power plant.

[0073] In addition, in one embodiment, an embodiment of the present disclosure also provides a computer program product, which is a computer program that can be executed by a programmable device, and the computer program has a code portion for executing the above-mentioned primary frequency regulation method of the thermal power grid when executed by the programmable device.

[0074] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0075] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0076] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for primary frequency modulation of a power grid of a thermal power unit, characterized in that: include: In response to receiving a frequency modulation instruction, obtaining an average output value of the thermal power unit in a preset time period before the current moment; The primary frequency modulation instruction is adjusted by using the average output value of the unit to obtain an optimized primary frequency modulation instruction; The optimized primary frequency regulation instruction is used to trigger the primary frequency regulation process of the power grid of the thermal power unit; wherein, during the primary frequency regulation process, the reverse regulation action of the thermal power unit is prohibited.

2. The method according to claim 1, characterized in that The step of obtaining the average output value of the thermal power unit in a preset time period before the current moment includes: Obtain the frequency difference load corresponding to the thermal power unit at each moment in the preset time period; The valve flow rate corresponding to each moment of the thermal power unit within the preset time period is obtained by converting the frequency difference load; The unit output value corresponding to each moment in the preset time period is calculated according to the frequency difference load and the valve flow, and the unit output average value is calculated.

3. The method according to claim 1, characterized in that The adjusting the primary frequency modulation instruction by using the average output value of the unit includes: When the unit output value corresponding to the current moment is less than the unit output average value, increasing the actual output value of the thermal power unit at the current moment according to the difference between the unit output average value and the unit output value; According to the actual output value, the primary frequency modulation instruction is adjusted.

4. The method according to claim 1, characterized in that: The process of triggering the primary frequency regulation of the power grid of the thermal power generation unit by the optimized primary frequency regulation instruction includes: In response to receiving the optimized primary frequency modulation instruction, detecting a frequency difference between an actual frequency and a rated frequency of the power grid of the thermal power generating unit; When the frequency difference exceeds the preset dead zone range, a frequency modulation signal is generated; The power grid is subjected to primary frequency modulation according to the primary frequency modulation signal.

5. The method according to claim 4, characterized in that The actual frequency is the actual rotation speed of the DEH system side of the thermal power unit, and the preset dead zone range is 3000±2RPM.

6. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: A frequency regulation process is assisted by a triple redundant high-precision frequency difference controller; wherein the triple redundant high-precision frequency difference controller is used to measure the grid frequency difference of the thermal power unit, and the grid frequency difference is used to calculate the frequency difference load of the thermal power unit.

7. A primary frequency modulation device for a thermal power grid, characterized in that: include: An acquisition module is configured to, in response to receiving a frequency modulation instruction, acquire an average output value of the thermal power unit in a preset time period before the current moment; an optimization module, configured to adjust the primary frequency modulation instruction by using the average output value of the unit to obtain an optimized primary frequency modulation instruction; The frequency regulation module is configured to trigger a primary frequency regulation process of the power grid of the thermal power unit through the optimized primary frequency regulation instruction; wherein, during the primary frequency regulation process, the reverse regulation action of the thermal power unit is prohibited.

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

9. An electronic device, characterized in that: include: 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 according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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