Thermal power primary frequency modulation performance monitoring method and system for deep peak regulation

Abstract

The invention belongs to the field of frequency modulation control of a power system, and particularly relates to a thermal power primary frequency modulation performance monitoring method and system for deep peak regulation, and the method comprises the steps: reading the real-time operation data of a thermal power generating unit and the state quantity of an energy storage system; judging whether the thermal power generating unit has a primary frequency modulation demand or not, and if yes, sending primary frequency modulation early warning information; and synchronously obtaining the electric quantity completion degree and the relative response rate of the thermal power generating unit in the primary frequency modulation process, and evaluating and checking the primary frequency modulation. The system for realizing the method can realize primary frequency modulation early warning, monitor primary frequency modulation performance indexes and complete primary frequency modulation performance assessment, can be used for guiding operation adjustment of dispatching operation personnel and guaranteeing the stability of a power system, and has good social benefits.

Description

Technical Field

[0001] This invention relates to the field of power system frequency regulation control technology, and in particular to a method and device for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving. Background Technology

[0002] Currently, my country's power system is in the process of transitioning from traditional thermal power to renewable energy. Thermal power units remain the main providers of primary frequency regulation. However, with the continuous increase in renewable energy installed capacity, the uncertainty of renewable energy output has exacerbated the difficulty of balancing supply and demand during critical periods of power supply security. Furthermore, the detailed rules for each regional power grid have set assessment requirements for the primary frequency regulation of thermal power units and included it in the scope of paid ancillary services. However, evaluating the primary frequency regulation operation of thermal power units, optimizing energy storage configuration, and improving the primary frequency regulation performance of thermal power units requires a reasonable and accurate monitoring system for the primary frequency regulation performance of thermal power units.

[0003] Currently, primary frequency regulation monitoring of thermal power units often uses theoretical analysis or empirical methods, which mainly involve recording and analyzing data after the primary frequency regulation process has ended, focusing on static regulation performance such as primary frequency regulation capacity. However, in low-inertia power systems dominated by renewable energy sources, the dynamic regulation performance of primary frequency regulation of thermal power units is equally important. A rapid response rate can mitigate disturbances and reduce the probability of large-scale grid disconnection of renewable energy sources and low-frequency load shedding. Existing power systems lack a comprehensive monitoring system to evaluate and improve the dynamic regulation performance of primary frequency regulation of thermal power units. Summary of the Invention

[0004] To address the technical problem of the lack of a comprehensive monitoring system for evaluating and improving the dynamic regulation performance of primary frequency regulation in power systems for thermal power units, which is a problem in existing technologies, this invention provides a method and apparatus for monitoring the primary frequency regulation performance of thermal power units for deep peak shaving. The technical solution is as follows:

[0005] On the one hand, a method for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving is provided. This method is implemented by frequency regulation performance monitoring equipment and includes:

[0006] The method includes:

[0007] S1. Read power system operation data;

[0008] S2. Determine if the thermal power unit has a primary frequency regulation requirement. If a primary frequency regulation requirement is found, issue a primary frequency regulation warning and proceed to the next step.

[0009] S3. Obtain monitoring indicators of the primary frequency regulation performance of thermal power units;

[0010] The primary frequency regulation performance monitoring indicators include power completion rate C and relative response rate ν;

[0011] The battery completion rate is shown in equation (1):

[0012]

[0013] In formula (1):

[0014] Q s —Actual frequency regulation power consumption during a single frequency regulation process, unit: MWh;

[0015] Q l —Theoretical frequency modulation power during a single frequency modulation process, in MWh;

[0016] Q st —Primary frequency regulation power of the energy storage system, unit: MWh;

[0017] t0, t s —The start and end times of a frequency modulation, in seconds;

[0018] P s —Actual power of primary frequency regulation of thermal power units, unit: MW;

[0019] K—Primary frequency modulation power frequency coefficient;

[0020] P l —Theoretical primary frequency regulation power of power systems, unit: MW;

[0021] T g —Inertial time constant of thermal power units, unit: s;

[0022] s — Laplace operator;

[0023] P st P w P v P h P n —These represent the changes in power output of energy storage systems, wind turbines, photovoltaic systems, hydropower units, and nuclear power units, respectively, in MW.

[0024] The relative response rate is shown in equation (2):

[0025]

[0026] In equation (2): t l The maximum duration of a single frequency modulation is:

[0027]

[0028] P minThis is the minimum output of a thermal power unit during primary frequency regulation, in MW.

[0029] S4. Evaluate and assess the primary frequency regulation performance of thermal power units based on the monitoring index values ​​of primary frequency regulation performance.

[0030] On the other hand, a thermal power plant primary frequency regulation performance monitoring system for deep peak shaving is provided. This system is applied to a method for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving. The system includes:

[0031] Data reading module; used to read power system operation data;

[0032] Primary frequency regulation judgment module; used to determine whether a thermal power unit has a primary frequency regulation requirement;

[0033] Monitoring index acquisition module; used to acquire primary frequency regulation performance monitoring indicators;

[0034] Evaluation and assessment module; used to evaluate and assess the performance of primary frequency regulation based on the monitoring index values ​​of primary frequency regulation performance.

[0035] On the other hand, a frequency regulation performance monitoring device is provided, the frequency regulation performance monitoring device comprising: a processor; a memory, the memory storing computer-readable instructions, which, when executed by the processor, implement any of the methods described above for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving.

[0036] On the other hand, a computer-readable storage medium is provided, wherein at least one instruction is stored therein, the at least one instruction being loaded and executed by a processor to implement any of the above-described methods for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving.

[0037] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following:

[0038] This invention provides a method and system for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving. By reading real-time operational data, including power system frequency data and operational data from various devices, it determines whether a primary frequency regulation demand exists. If a demand exists, a primary frequency regulation warning is issued, and primary frequency regulation performance monitoring indicators are acquired. During the primary frequency regulation process, the performance indicators of power completion rate C and relative response rate v are monitored in real time. After the primary frequency regulation ends, the quality of the primary frequency regulation is evaluated and assessed. This invention can guide dispatchers to adjust the primary frequency regulation logic and actions, improving power system stability. It is an innovative method and system for monitoring primary frequency regulation performance with significant social benefits. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a flowchart of a method for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving, provided by an embodiment of the present invention.

[0041] Figure 2 This is an operational diagram of a method for monitoring the primary frequency regulation performance of thermal power plants oriented towards deep peak shaving, provided in an embodiment of the present invention.

[0042] Figure 3 This is a block diagram of a thermal power primary frequency regulation performance monitoring system for deep peak shaving provided in an embodiment of the present invention;

[0043] Figure 4 This is a schematic diagram of the structure of a frequency modulation performance monitoring device provided in an embodiment of the present invention. Detailed Implementation

[0044] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0045] In embodiments of the present invention, words such as "exemplarily," "for example," etc., are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present the concept in a concrete manner. Furthermore, in embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one.

[0046] In the embodiments of this invention, the terms "image" and "picture" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, their intended meanings are consistent. Similarly, the terms "of," "corresponding (relevant)," and "corresponding" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, their intended meanings are consistent.

[0047] In this embodiment of the invention, sometimes a subscript such as W1 may be written in a non-subscript form such as W1. When the difference is not emphasized, the meaning they express is the same.

[0048] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0049] This invention provides a method for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving. This method can be implemented by a frequency regulation performance monitoring device, which can be a terminal or a server.

[0050] like Figure 1-2 The flowchart shown is for a method to monitor the primary frequency regulation performance of thermal power plants for deep peak shaving. The processing flow of this method may include the following steps:

[0051] S1. Read power system operation data.

[0052] In one feasible implementation, the power system operation data read by S1 includes: real-time frequency data of the power system and real-time operation data of each device in the power system; the real-time operation data of each device in the power system includes the total load of the power system, the operation data of thermal power units, the operation data of energy storage systems, and the operation data of each new energy unit.

[0053] S2. Determine if the thermal power unit has a primary frequency regulation requirement. If a primary frequency regulation requirement is found, issue a primary frequency regulation warning and proceed to the next step.

[0054] Optionally, the specific execution process of S2 may include the following S21-S25:

[0055] S21. If the actual operating load of the thermal power unit is not higher than 0.35P max The judgment ends here, and the result is that no frequency modulation demand has occurred, where P max The installed capacity of thermal power units is expressed in MW.

[0056] S22. If the actual operating load of the thermal power unit is higher than 0.35P max Then continue to determine whether the power system frequency constraints and turbine speed constraints are met;

[0057] S23. If the real-time frequency of the power system exceeds 50±0033Hz and lasts for at least 3 seconds, the judgment ends and the result is that a frequency regulation requirement has occurred. Otherwise, continue to judge whether the turbine speed constraint is met.

[0058] S24. If the real-time speed of the steam turbine unit exceeds 3000±2 rpm and lasts for at least 3 seconds, the judgment ends and the judgment result is that a frequency regulation requirement has occurred; otherwise, the judgment result is that no frequency regulation requirement has occurred.

[0059] S25. When the judgment ends, if the judgment result is that a frequency modulation demand has occurred, a frequency modulation warning message is issued.

[0060] S3. Obtain monitoring indicators of the primary frequency regulation performance of thermal power units;

[0061] The primary frequency regulation performance monitoring indicators include power completion rate C and relative response rate ν;

[0062] The battery completion rate is shown in equation (1):

[0063]

[0064] In formula (1):

[0065] Q s —Actual frequency regulation power consumption during a single frequency regulation process, unit: MWh;

[0066] Q l —Theoretical frequency modulation power during a single frequency modulation process, in MWh;

[0067] Q st —Primary frequency regulation power of the energy storage system, unit: MWh;

[0068] t0, t s —The start and end times of a frequency modulation, in seconds;

[0069] P s —Actual power of primary frequency regulation of thermal power units, unit: MW;

[0070] K—Primary frequency modulation power frequency coefficient;

[0071] P l —Theoretical primary frequency regulation power of power systems, unit: MW;

[0072] T g —Inertial time constant of thermal power units, unit: s;

[0073] s — Laplace operator;

[0074] P st P w P v P h P n —These represent the changes in power output of energy storage systems, wind turbines, photovoltaic systems, hydropower units, and nuclear power units, respectively, in MW.

[0075] The relative response rate is shown in equation (2):

[0076]

[0077] In equation (2): t l The maximum duration of a single frequency modulation is:

[0078]

[0079] P min This represents the minimum output of a thermal power unit during primary frequency regulation, expressed in MW. Since the primary frequency regulation response rate of energy storage systems is much faster than that of thermal power units, small-scale frequency regulation needs can be met using only the energy storage system. However, large-scale frequency regulation needs must rely on thermal power units, which inevitably increases the primary frequency regulation time. Therefore, the maximum primary frequency regulation time should be the time required to regulate the power unit using only the thermal power unit at its minimum primary frequency regulation power.

[0080] Alternatively, the specific execution process of S3 can be as follows:

[0081] S31. Select the primary frequency regulation performance monitoring indicators for thermal power units: power completion rate C and relative response rate ν;

[0082] S32. Record the start time t0 of the primary frequency regulation when the power system frequency fluctuation exceeds the frequency constraint or the turbine unit speed fluctuation exceeds the speed constraint, and the end time t of the primary frequency regulation when the frequency and speed fluctuations return to the corresponding constraints. s ;

[0083] S33. Obtain the completion rate C of the first frequency modulation power, including:

[0084] S331. Obtain the primary frequency regulation power Q of the energy storage system. st ;

[0085] S332. Obtain the primary frequency modulation power frequency coefficient K;

[0086] S333, Obtain the inertial time constant T of the thermal power unit. g ;

[0087] S334. Obtain the output changes of energy storage systems, wind turbines, photovoltaic systems, hydropower units, and nuclear power units (P). st P w P v P h P n ;

[0088] S335. Calculate the completion rate C of the frequency modulation power consumption.

[0089] S34. Obtain the first-order frequency modulation relative response rate v. The specific steps are as follows:

[0090] S341. Calculate the maximum duration t of a single frequency modulation. l ;

[0091] S342. Calculate the first-order frequency modulation relative response rate v.

[0092] S4. Evaluate and assess the primary frequency regulation performance of thermal power units.

[0093] Optionally, S4 evaluates and assesses the primary frequency regulation performance of thermal power units based on primary frequency regulation performance monitoring index values, including:

[0094] S41. If the relative response rate v of a single frequency regulation is less than or equal to 0.15, it indicates that the duration of the single frequency regulation is relatively short and the single frequency regulation method tends to be a small-amplitude frequency regulation using only the energy storage system.

[0095] S42. If the relative response rate v of the first frequency regulation is greater than or equal to 0.75, it indicates that the duration of the first frequency regulation is relatively long and the first frequency regulation method tends to use only thermal power units for low-power frequency regulation.

[0096] S43. If the relative response rate of primary frequency regulation is 0.15 < v < 0.75, it indicates that the primary frequency regulation method tends to use a hybrid frequency regulation of energy storage system and high power thermal power unit.

[0097] S44. Obtain and assess the completion rate (C) of primary frequency regulation power consumption for the last 10 consecutive times, including:

[0098] S441, Regarding the single-cycle frequency modulation power completion rate C i If 0.8≤C i If the value is ≤1.2, the frequency modulation is considered qualified; otherwise, it is considered unqualified.

[0099] S442. Record the number of times N fails a single frequency tuning test. If N≥3, the test is deemed unqualified.

[0100] S443, Regarding the mean C m If 0.8≤C m If the score is ≤1.2, the assessment is considered passed; otherwise, it is considered failed.

[0101] S444. The assessment result for this assessment is given as either "pass" or "fail".

[0102] Figure 3 This is a block diagram illustrating a thermal power plant primary frequency regulation performance monitoring system for deep peak shaving, according to an exemplary embodiment. The system is used for a method of monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving. (Refer to...) Figure 3 The system includes:

[0103] Data reading module 310; used to read power system operation data, specifically, to read the real-time frequency data of the power system and the real-time operation data of each device in the power system; the real-time operation data of each device in the power system includes the total load of the power system, the operation data of thermal power units, the operation data of energy storage systems, and the operation data of each new energy unit;

[0104] Primary frequency regulation judgment module 320; used to determine whether the thermal power unit has a primary frequency regulation requirement. If a primary frequency regulation requirement is found, a primary frequency regulation warning is issued and the information is transmitted to the next module for the next operation.

[0105] Monitoring indicator acquisition module 330; used to acquire primary frequency regulation performance monitoring indicators, specifically, to calculate the power completion rate C and relative response rate ν based on power system operation data;

[0106] Evaluation and assessment module 340; used to evaluate and assess the performance of primary frequency regulation based on the monitoring index values ​​of primary frequency regulation performance.

[0107] Figure 4 This is a schematic diagram of the structure of a frequency modulation performance monitoring device provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the frequency modulation performance monitoring equipment may include the above-mentioned Figure 3 The illustrated system is a primary frequency regulation performance monitoring system for thermal power plants designed for deep peak shaving. Optionally, the frequency regulation performance monitoring device 410 may include a first processor 2001.

[0108] Optionally, the frequency modulation performance monitoring device 410 may also include a memory 2002 and a transceiver 2003.

[0109] The first processor 2001, memory 2002, and transceiver 2003 can be connected via a communication bus.

[0110] The following is combined Figure 4 A detailed description of each component of the frequency modulation performance monitoring device 410 is provided below:

[0111] The first processor 2001 is the control center of the frequency modulation performance monitoring device 410. It can be a single processor or a collective term for multiple processing elements. For example, the first processor 2001 can be one or more central processing units (CPUs), application-specific integrated circuits (ASICs), or one or more integrated circuits configured to implement embodiments of the present invention, such as one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs).

[0112] Optionally, the first processor 2001 can perform various functions of the frequency modulation performance monitoring device 410 by running or executing software programs stored in the memory 2002 and calling data stored in the memory 2002.

[0113] In a specific implementation, as one example, the first processor 2001 may include one or more CPUs, for example... Figure 4 CPU0 and CPU1 are shown in the diagram.

[0114] In a specific implementation, as one example, the frequency modulation performance monitoring device 410 may also include multiple processors, for example... Figure 4 The first processor 2001 and the second processor 2004 are shown in the diagram. Each of these processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). Here, "processor" can refer to one or more devices, circuits, and / or processing cores used to process data (e.g., computer program instructions).

[0115] The memory 2002 is used to store the software program that executes the present invention, and is controlled by the first processor 2001 to execute it. The specific implementation method can be referred to the above method embodiment, and will not be repeated here.

[0116] Optionally, the memory 2002 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto. The memory 2002 may be integrated with the first processor 2001 or may exist independently, and may be connected via the interface circuit of the frequency modulation performance monitoring device 410. Figure 4 (Not shown in the figure) is coupled to the first processor 2001, and the embodiments of the present invention do not specifically limit this.

[0117] The transceiver 2003 is used to communicate with network devices or with terminal devices.

[0118] Alternatively, transceiver 2003 may include a receiver and a transmitter. Figure 4(Not shown separately). The receiver is used to implement the receiving function, and the transmitter is used to implement the sending function.

[0119] Optionally, the transceiver 2003 can be integrated with the first processor 2001, or it can exist independently and be connected to the interface circuit of the frequency modulation performance monitoring device 410. Figure 4 (Not shown in the figure) is coupled to the first processor 2001, and the embodiments of the present invention do not specifically limit this.

[0120] It should be noted that, Figure 4 The structure of the frequency modulation performance monitoring device 410 shown in the diagram does not constitute a limitation on the router. Actual knowledge structure identification devices may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0121] Furthermore, the technical effect of the frequency regulation performance monitoring device 410 can be referred to the technical effect of the thermal power primary frequency regulation performance monitoring method for deep peak shaving described in the above method embodiments, and will not be repeated here.

[0122] It should be understood that the first processor 2001 in this embodiment of the invention may be a central processing unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0123] It should also be understood that the memory in the embodiments of the present invention can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of random access memory (RAM) are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate synchronous DRAM (DDR SDRAM), enhanced synchronous DRAM (ESDRAM), synchronous linked DRAM (SLDRAM), and direct rambus RAM (DR RAM).

[0124] The above embodiments can be implemented, in whole or in part, by software, hardware (such as circuits), firmware, or any other combination thereof. When implemented using software, the above embodiments can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more sets of available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. A semiconductor medium can be a solid-state drive.

[0125] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0126] In this invention, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be a single item or multiple items.

[0127] It should be understood that, in various embodiments of the present invention, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0128] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0129] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the devices, apparatuses, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0130] In the several embodiments provided by this invention, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0131] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0132] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0133] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0134] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving, characterized in that, The method includes: S1. Read power system operation data; S2. Determine if the thermal power unit has a primary frequency regulation requirement. If a primary frequency regulation requirement is found, issue a primary frequency regulation warning and proceed to the next step. S3. Obtain monitoring indicators of the primary frequency regulation performance of thermal power units; The primary frequency regulation performance monitoring indicators include power completion rate C and relative response rate ν; The battery completion rate is shown in equation (1): In formula (1): Q s —Actual frequency regulation power consumption during a single frequency regulation process, unit: MWh; Q l —Theoretical frequency modulation power during a single frequency modulation process, in MWh; Q st —Primary frequency regulation power of the energy storage system, unit: MWh; t0, t s —The start and end times of a frequency modulation, in seconds; P s —Actual power of primary frequency regulation of thermal power units, unit: MW; K—Primary frequency modulation power frequency coefficient; P l —Theoretical primary frequency regulation power of power systems, unit: MW; T g —Inertial time constant of thermal power units, unit: s; s — Laplace operator; P st P w P v P h P n —These represent the changes in power output of energy storage systems, wind turbines, photovoltaic systems, hydropower units, and nuclear power units, respectively, in MW. The relative response rate is shown in equation (2): In equation (2): t l The maximum duration of a single frequency modulation is: P min This is the minimum output of a thermal power unit during primary frequency regulation, in MW. S4. Evaluate and assess the primary frequency regulation performance of thermal power units based on the monitoring index values ​​of primary frequency regulation performance.

2. The method for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving according to claim 1, characterized in that, The power system operation data read by S1 includes: real-time frequency data of the power system and real-time operation data of each device in the power system; the real-time operation data of each device in the power system includes the total load of the power system, the operation data of thermal power units, the operation data of energy storage systems, and the operation data of each new energy unit.

3. The method for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving according to claim 1, characterized in that, The determination of whether a thermal power unit has a primary frequency regulation requirement in S2 includes: S21. If the actual operating load of the thermal power unit is not higher than 0.35P max The judgment ends here, and the result is that no frequency modulation demand has occurred, where P max The installed capacity of thermal power units is expressed in MW. S22. If the actual operating load of the thermal power unit is higher than 0.35P max Then continue to determine whether the power system frequency constraints and turbine speed constraints are met; S23. If the real-time frequency of the power system exceeds 50±0033Hz and lasts for at least 3 seconds, the judgment ends and the result is that a frequency regulation requirement has occurred. Otherwise, continue to judge whether the turbine speed constraint is met. S24. If the real-time speed of the steam turbine unit exceeds 3000±2 rpm and lasts for at least 3 seconds, the judgment ends and the judgment result is that a frequency regulation requirement has occurred; otherwise, the judgment result is that no frequency regulation requirement has occurred. S25. When the judgment ends, if the judgment result is that a frequency modulation demand has occurred, a frequency modulation warning message is issued.

4. The method for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving according to claim 1, characterized in that, The maximum duration t of the first frequency modulation in S3 l This refers to the frequency regulation duration when using only thermal power units at the minimum primary frequency regulation power.

5. The method for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving according to claim 1, characterized in that, The acquisition of primary frequency modulation performance monitoring indicators in S3 includes: S31. Select the primary frequency regulation performance monitoring indicators for thermal power units: power completion rate C and relative response rate ν; S32. Record the start time t0 of the primary frequency regulation when the power system frequency fluctuation exceeds the frequency constraint or the turbine unit speed fluctuation exceeds the speed constraint, and the end time t of the primary frequency regulation when the frequency and speed fluctuations return to the corresponding constraints. s ; S33. Obtain the completion rate C of the first frequency modulation power, including: S331. Obtain the primary frequency regulation power Q of the energy storage system. st ; S332. Obtain the primary frequency modulation power frequency coefficient K; S333, Obtain the inertial time constant T of the thermal power unit. g ; S334. Obtain the output changes of energy storage systems, wind turbines, photovoltaic systems, hydropower units, and nuclear power units (P). st P w P v P h P n ; S335. Calculate the completion rate C of the frequency modulation power consumption. S34. Obtain the first-order frequency modulation relative response rate v. The specific steps are as follows: S341. Calculate the maximum duration t of a single frequency modulation. l ; S342. Calculate the first-order frequency modulation relative response rate v.

6. The method for monitoring the primary frequency regulation performance of thermal power plants for deep peak shaving according to claim 1, characterized in that, The evaluation and assessment of primary frequency regulation performance based on the monitoring index values ​​of primary frequency regulation performance in S4 includes: S41. If the relative response rate v of a single frequency regulation is less than or equal to 0.15, it indicates that the duration of the single frequency regulation is relatively short and the single frequency regulation method tends to be a small-amplitude frequency regulation using only the energy storage system. S42. If the relative response rate v of the first frequency regulation is greater than or equal to 0.75, it indicates that the duration of the first frequency regulation is relatively long and the first frequency regulation method tends to use only thermal power units for low-power frequency regulation. S43. If the relative response rate of primary frequency regulation is 0.15 < v < 0.75, it indicates that the primary frequency regulation method tends to use a hybrid frequency regulation of energy storage system and high power thermal power unit. S44. Obtain and assess the completion rate (C) of primary frequency regulation power consumption for the last 10 consecutive times, including: S441, Regarding the single-cycle frequency modulation power completion rate C i If 0.8≤C i If the value is ≤1.2, the frequency modulation is considered qualified; otherwise, it is considered unqualified. S442. Record the number of times N fails a single frequency tuning test. If N≥3, the test is deemed unqualified. S443, Regarding the mean C m If 0.8≤C m If the score is ≤1.2, the assessment is considered passed; otherwise, it is considered failed. S444. The assessment result for this assessment is given as either "pass" or "fail".

7. A thermal power plant primary frequency regulation performance monitoring system for deep peak shaving, wherein the thermal power plant primary frequency regulation performance monitoring system for deep peak shaving is used to implement the thermal power plant primary frequency regulation performance monitoring method for deep peak shaving as described in any one of claims 1-6, characterized in that, The device includes: Data reading module; used to read power system operation data; Primary frequency regulation judgment module; used to determine whether a thermal power unit has a primary frequency regulation requirement; Monitoring index acquisition module; used to acquire primary frequency regulation performance monitoring indicators; Evaluation and assessment module; used to evaluate and assess the performance of primary frequency regulation based on the monitoring index values ​​of primary frequency regulation performance.

8. A frequency modulation performance monitoring device, characterized in that, The frequency modulation performance monitoring device includes: processor; A memory storing computer-readable instructions that, when executed by the processor, implement the method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium contains program code that can be invoked by a processor to execute the method as described in any one of claims 1 to 6.

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