Primary frequency modulation and inertia response decoupling method and device

Abstract

The present invention relates to a method and device for decoupling primary frequency modulation and inertia response, the method comprising obtaining a frequency response curve and an active power response curve when the frequency of a new energy station exceeds a limit; based on the data of the frequency response curve, calculating the active power of the primary frequency modulation and the active power of the inertia response when the frequency exceeds the limit; decoupling the primary frequency modulation and the inertia response according to the coupling of the active power of the primary frequency modulation and the active power of the inertia response on the active power response curve to obtain a decoupling result; analyzing the primary frequency modulation performance and the inertia response performance according to the decoupling result. The present invention proportionally decouples the primary frequency modulation and the inertia response process of a station with a frequency exceeding limit fault based on frequency modulation power analysis, and has a good decoupling effect, thereby analyzing the primary frequency modulation and the inertia response respectively according to the decoupling result to obtain the primary frequency modulation performance and the inertia response performance, which has a high degree of credibility.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power market, and in particular relates to a method and a device for decoupling primary frequency modulation and inertia response. Background Art

[0002] In the context of the rapid development of new energy power systems, new energy stations, as an important part of it, have a vital role in the stable operation of the power system in terms of their frequency active support capabilities. However, there is a complex coupling relationship between the primary frequency regulation response and the inertia response of new energy stations, which to some extent affects the performance of their frequency active support capabilities. Therefore, decoupling the primary frequency regulation response and the inertia response has become an important issue in evaluating the frequency active support capabilities of new energy stations.

[0003] Primary frequency response refers to the ability of a new energy station to quickly respond to frequency fluctuations by adjusting its active output when the system frequency changes. Inertia response refers to the ability of a new energy station to use its internal rotational inertia or virtual inertia to provide additional damping when the system is disturbed, thereby slowing down the speed of frequency changes.

[0004] In the actual operation of new energy stations, primary frequency modulation response and inertia response often influence and restrict each other. On the one hand, the adjustment of primary frequency modulation response may change the inertia characteristics of the station, thereby affecting the effect of inertia response; on the other hand, the provision of inertia response may also affect the speed and accuracy of primary frequency modulation response. This coupling relationship makes it difficult for the frequency active support capability of new energy stations to be fully utilized, and may even cause system frequency instability. Summary of the invention

[0005] In view of this, the purpose of the present invention is to overcome the shortcomings of the prior art and provide a method and device for decoupling primary frequency modulation and inertia response, so as to solve the problem that the coupling relationship between primary frequency modulation response and inertia response in the prior art makes it difficult to give full play to the active frequency support capability of the new energy station, and may even cause system frequency instability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a method for decoupling primary frequency modulation and inertia response, comprising:

[0007] Obtain the frequency response curve and active power response curve of the new energy station when the frequency exceeds the limit;

[0008] Based on the data of the frequency response curve, the active power of the primary frequency modulation and the active power of the inertia response when the frequency exceeds the limit are calculated;

[0009] Decoupling the primary frequency modulation and the inertia response according to the coupling of the active power of the primary frequency modulation and the active power of the inertia response on the active power response curve to obtain a decoupling result;

[0010] The primary frequency modulation performance and inertia response performance are analyzed according to the decoupling result.

[0011] Furthermore, the following method is used to calculate the active power of the primary frequency modulation when the frequency exceeds the limit:

[0012]

[0013] Among them, ΔP t is the theoretical change of active power of the primary frequency regulation control of the new energy station; δ is the primary frequency regulation rate; Δf is the frequency deviation of the grid connection point of the new energy power station; f N is the system rated frequency; P N It is the active power rating of the new energy power station.

[0014] Furthermore, the active power of the inertia response is calculated in the following way:

[0015]

[0016]

[0017] Among them, ΔP I The active power of the new energy station inertia response control; T J is the equivalent inertia time constant of the station; t is the time; df / dt is the derivative of frequency with respect to time.

[0018] Furthermore, the primary frequency modulation and inertia response are decoupled to obtain a decoupling result, including:

[0019] Acquiring an actual change in active power based on the active power response curve;

[0020] The primary frequency modulation and inertia response are decoupled in a preset ratio based on the actual change in active power to obtain the actual change in active power controlled by the primary frequency modulation and the actual change in active power controlled by the inertia response.

[0021] Furthermore, based on the actual change in active power, the primary frequency modulation and inertia response are decoupled in a preset ratio in the following manner, including:

[0022]

[0023]

[0024] Among them, ΔP atis the actual change in active power during primary frequency modulation control, ΔP aI is the actual change in active power controlled by inertia response, ΔP a is the actual change in active power.

[0025] Further, the primary frequency modulation performance is analyzed by using the index value of the response lag time index, the index value of the rise time index, and the index value of the adjustment time index, and the primary frequency modulation performance is analyzed according to the decoupling result, including:

[0026] The indicator value of the response lag time indicator is calculated in the following way:

[0027] t pred =t1-t0

[0028] The indicator value of the rise time indicator is calculated in the following way,

[0029] t prer =t2-t0

[0030] The index value of the adjustment time index is calculated in the following way:

[0031] t preg =t3-t0

[0032] Among them, t pred is the response lag time indicator, t prer is the rise time indicator, t preg It is the adjustment time index, t0 is the starting time of the primary frequency modulation control response, t1 is the moment when the active power change reaches 10% of the primary frequency modulation power target value for the first time, t2 is the moment when the active power change reaches 90% of the primary frequency modulation power target value for the first time, and t3 is the starting time when the active power continuously runs within ±5% of the primary frequency modulation power target value.

[0033] Further, the inertia response performance is analyzed by using the index value of the active climbing rate index, and the inertia response performance is analyzed according to the decoupling result, including:

[0034] According to the actual change amount of the inertia response control active power, an actual change curve of the inertia response control active power is obtained;

[0035] Based on the actual change curve of the inertia response control active power, an initial value and a target value of the inertia response regulation active power are obtained;

[0036] The index value of the active power climbing rate index is calculated by adjusting the active power initial value and the target value according to the inertia response.

[0037] Further, the active power initial value and target value are adjusted according to the inertia response, and the index value of the active power climbing rate index is calculated in the following manner:

[0038]

[0039] Among them, v wp is the active power ramp rate indicator, P0 and P1 are respectively the initial value and target of active power adjusted by inertia response; t s and t s They are the moment when the inertia response starts to be adjusted and the moment when the adjustment target is reached.

[0040] A second aspect of the present disclosure provides a primary frequency modulation and inertia response decoupling device, comprising:

[0041] An acquisition module is used to obtain a frequency response curve and an active power response curve when the frequency of a new energy station exceeds the limit;

[0042] A calculation module, used for calculating the active power of the primary frequency modulation and the active power of the inertia response when the frequency exceeds the limit based on the data of the frequency response curve;

[0043] a decoupling module, configured to decouple the primary frequency modulation and the inertia response according to the coupling of the active power of the primary frequency modulation and the active power of the inertia response on the active power response curve, and obtain a decoupling result;

[0044] An analysis module is used to analyze the primary frequency modulation performance and inertia response performance according to the decoupling result.

[0045] According to a third aspect of the present disclosure, an embodiment of the present application provides an electronic device, including:

[0046] at least one processor; and

[0047] a memory communicatively connected to the at least one processor; wherein,

[0048] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the steps of the method described in any one of the above embodiments.

[0049] An embodiment of the present application further provides a computer storage medium storing a computer program. When the computer program is executed by a processor, the processor executes the steps of any one of the above-mentioned primary frequency modulation and inertia response decoupling methods.

[0050] The present invention adopts the above technical solution, and the beneficial effects that can be achieved include:

[0051] The present invention provides a method and device for decoupling primary frequency modulation and inertia response. The present application first obtains the frequency response curve and active power response curve when the frequency of a new energy station exceeds the limit, obtains corresponding test data, and then calculates the active power of the primary frequency modulation and the active power of the inertia response when the frequency exceeds the limit according to the test data. Because the active power of the primary frequency modulation and the active power of the inertia response are coupled on the active power response curve, the primary frequency modulation and the inertia response are decoupled to obtain a decoupling result, thereby analyzing the primary frequency modulation performance and the inertia response performance. The present application uses the frequency response curve and the active power response curve to obtain corresponding test data, calculates the active power of the primary frequency modulation and the active power of the inertia response, and then decouples, which has a good decoupling effect; thereby the performance of the primary frequency modulation and the inertia response are analyzed respectively, and the primary frequency modulation and inertia response capabilities of the new energy station can be analyzed separately according to the decoupling results, and a more accurate control strategy is obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0053] Figure 1 It is a schematic diagram of the steps of the primary frequency modulation and inertia response decoupling method of the present invention;

[0054] Figure 2 The frequency response curve of the new energy power station of the present invention when a frequency over-limit fault occurs;

[0055] Figure 3 It is the active power response curve when a frequency over-limit fault occurs in the new energy power station of the present invention;

[0056] Figure 4 is the inertia response control curve obtained by decoupling the active power response in the present invention;

[0057] Figure 5 It is a primary frequency modulation control curve obtained by decoupling the active power response in the present invention;

[0058] Figure 6 It is a structural schematic diagram of the primary frequency modulation and inertia response decoupling device of the present invention;

[0059] Figure 7 It is a structural schematic diagram of an electronic device involved in the primary frequency modulation and inertia response decoupling method of the present invention. DETAILED DESCRIPTION

[0060] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0061] A specific primary frequency modulation and inertia response decoupling method and device provided in an embodiment of the present application is described below in conjunction with the accompanying drawings.

[0062] like Figure 1 As shown, the primary frequency modulation and inertia response decoupling method provided in the embodiment of the present application includes:

[0063] S101, obtaining a frequency response curve and an active power response curve when the frequency of a new energy station exceeds a limit;

[0064] It can be understood that the present application can obtain corresponding test data by obtaining the frequency response curve and active power response curve of the new energy station frequency exceeding the limit fault, wherein the obtained test data can be fault recording data and / or new energy station frequency response performance test data.

[0065] The frequency response curve is as follows: Figure 2 As shown, the active power response curve is as follows Figure 3 shown.

[0066] S102, based on the data of the frequency response curve, calculating the active power of the primary frequency modulation and the active power of the inertia response when the frequency exceeds the limit;

[0067] According to the data of time and system frequency on the frequency response curve, the active power of the primary frequency modulation and the active power of the inertia response can be calculated, so as to proceed to the next step according to the active power of the primary frequency modulation and the active power of the inertia response.

[0068] Primary Frequency Control refers to the regulation of generator sets through automatic generator control systems in response to instantaneous changes in the power system frequency. When the power system load changes or a generator set fails, the power system frequency will shift for a short period of time. Primary frequency control is the process of quickly responding to frequency changes by increasing or decreasing the output power of the generator set to restore the frequency stability of the power system. In short, the primary frequency control of the power system is mainly the process of the generator set automatically responding to frequency changes to restore frequency stability in a short period of time.

[0069] Primary frequency regulation, also known as quick-break frequency regulation or fast frequency regulation, is an immediate response mechanism when a sudden load change or generator failure occurs in the power system. Primary frequency regulation achieves rapid regulation of the power system frequency through the mechanical inertia of the generator set and the feedback control of the automatic voltage regulator. When the power system frequency is low, the generator set will increase the output power; conversely, when the power system frequency is high, the generator set will reduce the output power. The response of primary frequency regulation is usually completed within a few seconds, and its main purpose is to restore the stability of the power system frequency.

[0070] Inertia response refers to the response capability when receiving grid frequency disturbance.

[0071] In the power system, the inertia response stage involves the sudden change of the electromagnetic power of the unit after the power shortage, the mechanical power remains unchanged, the rotor changes according to the rotor motion equation under the action of unbalanced torque, the speed decreases to release kinetic energy, and resists the decrease in system frequency. When the system frequency exceeds the governor threshold, the governor system acts to restore the system frequency to the allowable range.

[0072] S103, decoupling the primary frequency modulation and the inertia response according to the coupling of the active power of the primary frequency modulation and the active power of the inertia response on the active power response curve to obtain a decoupling result;

[0073] It can be understood that the active power response curve is the relationship between time and the active power of the station. In this application, because the active power of the primary frequency modulation and the active power of the inertia response are coupled on the active power response curve, decoupling processing is performed based on the coupling to obtain a decoupling result. It can be understood that the decoupling result can be analyzed separately for the primary frequency modulation and inertia response.

[0074] S104: Analyze the primary frequency modulation performance and inertia response performance according to the decoupling result.

[0075] According to the actual change of active power controlled by primary frequency modulation and the actual change of active power controlled by inertia response in the decoupling results, the primary frequency modulation performance and inertia response performance are analyzed respectively.

[0076] The working principle of the primary frequency modulation and inertia response decoupling method is: this application uses the frequency response curve and the active power response curve to obtain the corresponding test data, calculates the active power of the primary frequency modulation and the active power of the inertia response, and then decouples them, which has a good decoupling effect; thereby, the performance of the primary frequency modulation and the inertia response are analyzed separately, and according to the decoupling results, the primary frequency modulation and inertia response capabilities of the new energy station can be analyzed separately to obtain a more accurate control strategy.

[0077] In some optional embodiments, for the primary frequency modulation of the new energy station, when the frequency deviation of the power system is greater than the dead zone range, the active power of the primary frequency modulation when the frequency exceeds the limit is calculated in the following manner:

[0078]

[0079] Among them, ΔP t is the active power of the primary frequency regulation control of the new energy station, in megawatts (WM); δ is the primary frequency regulation rate; Δf is the frequency deviation of the grid connection point of the new energy power station, in Hertz (Hz); f N is the rated frequency of the system, in Hertz (Hz); P N It is the active power rating of the new energy power station, measured in megawatts (WM).

[0080] In some optional embodiments, for the inertia response of the new energy station, the frequency dead zone of the inertia response should be coordinated with the primary frequency regulation dead zone. When the frequency deviation of the power system is greater than the dead zone range, the active power adjusted by the inertia response of the new energy station is calculated in the following manner:

[0081]

[0082] Among them, ΔP I is the theoretical change of active power of the inertia response control of the new energy station, in megawatts (WM); T J is the equivalent inertia time constant of the station, in seconds (s), generally set to 4s~14s; t is time, in seconds (s); df / dt is the derivative of frequency with respect to time, that is, the frequency change per unit time dt.

[0083] The inertia response provided by new energy stations must also meet the following requirements:

[0084]

[0085] This application uses the theoretical calculation formula of primary frequency modulation and inertia response and the frequency deviation Δf and frequency change rate df / dt obtained by analyzing the frequency response curve of the new energy station to calculate the theoretical change ΔP of active power provided by the primary frequency modulation control when the frequency exceeds the limit fault. t The theoretical change in active power ΔP provided by the inertia response control I .

[0086] In some optional embodiments, decoupling the primary frequency modulation and the inertia response to obtain a decoupling result includes:

[0087] Acquiring an actual change in active power based on the active power response curve;

[0088] The primary frequency modulation and inertia response are decoupled in a preset ratio based on the actual change in active power to obtain the actual change in active power controlled by the primary frequency modulation and the actual change in active power controlled by the inertia response.

[0089] Specifically, in this application, the actual change in active power ΔP is extracted from the active power response curve of the station. a According to the principle of equal-proportional distribution of active power, the actual change of active power ΔP of primary frequency modulation control is obtained by decoupling at The actual change of active power ΔP is controlled by inertia response aI :

[0090]

[0091]

[0092] Among them, ΔP at is the actual change in active power during primary frequency modulation control, ΔP aI is the actual change in active power controlled by inertia response, ΔP a is the actual change in active power.

[0093] The actual change of active power ΔP is controlled by primary frequency modulation at Get as Figure 4 The time and primary frequency modulation output active power change curve shown in the figure controls the actual change of active power ΔP through inertia response. aI Get as Figure 5 The time and inertia response curve of output active power is shown.

[0094] In some optional embodiments, based on data in a curve of changes in active power output by a primary frequency modulation, an index value of a response lag time index, an index value of a rise time index, and an index value of an adjustment time index are used to analyze the primary frequency modulation performance, and the primary frequency modulation performance is analyzed according to the decoupling result, including:

[0095] The indicator value of the response lag time indicator is calculated in the following way:

[0096] t pred =t1-t0(6)

[0097] The indicator value of the rise time indicator is calculated in the following way,

[0098] t prer =t2-t0(7)

[0099] The index value of the adjustment time index is calculated in the following way:

[0100] t preg =t3-t0(8)

[0101] Among them, t pred is the response lag time indicator, t prer is the rise time indicator, t preg It is the adjustment time index, t0 is the starting time of the primary frequency modulation control response, t1 is the moment when the active power change reaches 10% of the primary frequency modulation power target value for the first time, t2 is the moment when the active power change reaches 90% of the primary frequency modulation power target value for the first time, and t3 is the starting time when the active power continuously runs within ±5% of the primary frequency modulation power target value.

[0102] Specifically, in this application, the response lag time index t is calculated pred is 1.58s, and the rise time index t prer is 1.78s, adjust the time index t preg It is 4.44s, which is within the range specified by national standards, and the primary frequency modulation performance is qualified.

[0103] In some optional embodiments, the inertia response performance is analyzed by using an index value of an active climbing rate index, and the inertia response performance is analyzed according to the decoupling result, including:

[0104] According to the actual change amount of the inertia response control active power, an actual change curve of the inertia response control active power is obtained;

[0105] Based on the actual change curve of the inertia response control active power, an initial value and a target value of the inertia response regulation active power are obtained;

[0106] The index value of the active power climbing rate index is calculated by adjusting the active power initial value and the target value according to the inertia response.

[0107] In some optional embodiments, according to Figure 5 The inertia response output active power change curve shown in FIG. 1 is used to obtain the initial value and target value of the inertia response active power. The active power initial value and target value are adjusted according to the inertia response, and the index value of the active climbing rate index is calculated in the following manner:

[0108]

[0109] Among them, v wp is the active power ramp rate indicator, P0 and P1 are respectively the initial value and target of active power adjusted by inertia response; t s and t s They are the moment when the inertia response starts to be adjusted and the moment when the adjustment target is reached.

[0110] It can be understood that the above index values ​​can be used to analyze the primary frequency regulation performance and inertia response performance of new energy stations.

[0111] like Figure 6 As shown, the present application provides a primary frequency modulation and inertia response decoupling device, comprising:

[0112] An acquisition module 601 is used to acquire a frequency response curve and an active power response curve when the frequency of a new energy station exceeds a limit;

[0113] A calculation module 602, for calculating the active power of the primary frequency modulation and the active power of the inertia response when the frequency exceeds the limit based on the data of the frequency response curve;

[0114] A decoupling module 603, configured to decouple the primary frequency modulation and the inertia response according to the coupling of the active power of the primary frequency modulation and the active power of the inertia response on the active power response curve, and obtain a decoupling result;

[0115] The analysis module 604 is used to analyze the primary frequency modulation performance and inertia response performance according to the decoupling result.

[0116] The primary frequency modulation and inertia response decoupling device provided by the present application comprises an acquisition module 601 that acquires a frequency response curve and an active power response curve when the frequency of a new energy station exceeds a limit; a calculation module 602 calculates the active power of the primary frequency modulation and the active power of the inertia response when the frequency exceeds a limit based on data of the frequency response curve; a decoupling module 603 decouples the primary frequency modulation and the inertia response according to coupling of the active power of the primary frequency modulation and the active power of the inertia response on the active power response curve to obtain a decoupling result; and an analysis module 604 analyzes the primary frequency modulation performance and the inertia response performance according to the decoupling result.

[0117] The primary frequency modulation and inertia response decoupling method and device provided in the present application obtain the frequency response curve and active power response curve of the new energy station when the frequency exceeds the limit; based on the data of the frequency response curve, calculate the active power of the primary frequency modulation and the active power of the inertia response when the frequency exceeds the limit; according to the coupling of the active power of the primary frequency modulation and the active power of the inertia response on the active power response curve, decouple the primary frequency modulation and the inertia response to obtain the decoupling result; analyze the primary frequency modulation performance and the inertia response performance according to the decoupling result. The present invention proportionally decouples the primary frequency modulation and the inertia response process of the station with frequency exceeding the limit fault based on the frequency modulation power analysis, and has a good decoupling effect, so that the primary frequency modulation and the inertia response are analyzed separately according to the decoupling result, and the primary frequency modulation performance and the inertia response performance are obtained, which has a high credibility.

[0118] According to an embodiment of the present disclosure, the present disclosure also provides an electronic device and a readable storage medium.

[0119] Figure 7A schematic block diagram of an example electronic device 700 that can be used to implement an embodiment of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present disclosure described and / or required herein.

[0120] like Figure 7 As shown, the device 700 includes a computing unit 701, which can perform various appropriate actions and processes according to a computer program stored in a read-only memory (ROM) 702 or a computer program loaded from a storage unit 708 into a random access memory (RAM) 703. In the RAM 703, various programs and data required for the operation of the device 700 can also be stored. The computing unit 701, the ROM 702, and the RAM 703 are connected to each other via a bus 704. An input / output (I / O) interface 705 is also connected to the bus 704.

[0121] A number of components in the device 700 are connected to the I / O interface 705, including: an input unit 706, such as a keyboard, a mouse, etc.; an output unit 707, such as various types of displays, speakers, etc.; a storage unit 708, such as a disk, an optical disk, etc.; and a communication unit 709, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 709 allows the device 700 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0122] The computing unit 701 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the computing unit 701 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The computing unit 701 performs the various methods and processes described above, such as the primary frequency modulation and inertia response decoupling method. For example, in some embodiments, the primary frequency modulation and inertia response decoupling method may be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit 708. In some embodiments, part or all of the computer program may be loaded and / or installed on the device 700 via the ROM 702 and / or the communication unit 709. When the computer program is loaded into the RAM 703 and executed by the computing unit 701, one or more steps of the primary frequency modulation and inertia response decoupling method described above may be performed. Alternatively, in other embodiments, the computing unit 701 may be configured to perform the primary frequency modulation and inertia response decoupling method in any other appropriate manner (eg, by means of firmware).

[0123] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0124] The program code for implementing the method of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0125] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0126] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0127] The systems and techniques described herein may be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), and the Internet.

[0128] A computer system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship of client and server is generated by computer programs running on respective computers and having a client-server relationship with each other. The server may be a cloud server, a server of a distributed system, or a server combined with a blockchain.

[0129] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved, and this document does not limit this.

[0130] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0131] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A method for decoupling primary frequency modulation and inertia response, characterized in that: include: Obtain the frequency response curve and active power response curve of the new energy station when the frequency exceeds the limit; Based on the data of the frequency response curve, the active power of the primary frequency modulation and the active power of the inertia response when the frequency exceeds the limit are calculated; Decoupling the primary frequency modulation and the inertia response according to the coupling of the active power of the primary frequency modulation and the active power of the inertia response on the active power response curve to obtain a decoupling result; Analyzing the primary frequency modulation performance and inertia response performance according to the decoupling result; Decoupling the primary frequency modulation and inertia response to obtain a decoupling result, including: Acquiring an actual change in active power based on the active power response curve; Decoupling the primary frequency modulation and the inertia response at a preset ratio based on the actual change in active power to obtain an actual change in active power controlled by the primary frequency modulation and an actual change in active power controlled by the inertia response; Based on the actual change in active power, the primary frequency modulation and inertia response are decoupled in a preset ratio in the following manner, including: Where ΔP at is the actual change in active power during primary frequency modulation control, ΔP aI is the actual change in active power controlled by inertia response, ΔP a is the actual change in active power; Analyzing the primary frequency modulation performance by using the index value of the response lag time index, the index value of the rise time index, and the index value of the adjustment time index, and analyzing the primary frequency modulation performance according to the decoupling result, including: The indicator value of the response lag time indicator is calculated in the following way: t pred =t1-t0 The indicator value of the rise time indicator is calculated in the following way, t prer =t2-t0 The index value of the adjustment time index is calculated in the following way: t preg =t3-t0 Among them, t pred is the response lag time indicator, t prer is the rise time indicator, t preg is the adjustment time index, t0 is the start time of the primary frequency modulation control response, t1 is the time when the active power change reaches 10% of the primary frequency modulation power target value for the first time, t2 is the time when the active power change reaches 90% of the primary frequency modulation power target value for the first time, and t3 is the start time when the active power continuously runs within ±5% of the primary frequency modulation power target value; The inertia response performance is analyzed by using the index value of the active climbing rate index, and the inertia response performance is analyzed according to the decoupling result, including: According to the actual change amount of the inertia response control active power, an actual change curve of the inertia response control active power is obtained; Based on the actual change curve of the inertia response control active power, an initial value and a target value of the inertia response regulation active power are obtained; Calculating an index value of an active power climbing rate index by adjusting an initial value and a target value of active power according to the inertia response; According to the inertia response, the initial value and target value of active power are adjusted, and the index value of the active power climbing rate index is calculated in the following manner: Among them, v wp is the active power ramp rate indicator, P0 and P1 are respectively the initial value and target of active power adjusted by inertia response; t s and t s They are the moment when the inertia response starts to be adjusted and the moment when the adjustment target is reached.

2. The method according to claim 1, characterized in that The following method is used to calculate the active power of the primary frequency modulation when the frequency exceeds the limit: Where ΔP t is the active power of the primary frequency regulation control of the new energy station; δ is the primary frequency regulation rate; Δf is the frequency deviation of the grid connection point of the new energy power station; f N is the system rated frequency; P N It is the active power rating of the new energy power station.

3. The method according to claim 2, characterized in that The active power of the inertia response is calculated as follows, Where ΔP I The active power of the new energy station inertia response control; T J is the equivalent inertia time constant of the station; t is the time; df / dt is the derivative of frequency with respect to time.

4. A primary frequency modulation and inertia response decoupling device, characterized in that: include: An acquisition module is used to obtain a frequency response curve and an active power response curve when the frequency of a new energy station exceeds the limit; A calculation module, used for calculating the active power of the primary frequency modulation and the active power of the inertia response when the frequency exceeds the limit based on the data of the frequency response curve; a decoupling module, configured to decouple the primary frequency modulation and the inertia response according to the coupling of the active power of the primary frequency modulation and the active power of the inertia response on the active power response curve, and obtain a decoupling result; An analysis module, used for analyzing the primary frequency modulation performance and inertia response performance according to the decoupling result; Decoupling the primary frequency modulation and inertia response to obtain a decoupling result, including: Acquiring an actual change in active power based on the active power response curve; Decoupling the primary frequency modulation and the inertia response at a preset ratio based on the actual change in active power to obtain an actual change in active power controlled by the primary frequency modulation and an actual change in active power controlled by the inertia response; Based on the actual change in active power, the primary frequency modulation and inertia response are decoupled in a preset ratio in the following manner, including: Where ΔP at is the actual change in active power during primary frequency modulation control, ΔP aI is the actual change in active power controlled by inertia response, ΔP a is the actual change in active power; Analyzing the primary frequency modulation performance by using the index value of the response lag time index, the index value of the rise time index, and the index value of the adjustment time index, and analyzing the primary frequency modulation performance according to the decoupling result, including: The indicator value of the response lag time indicator is calculated in the following way: t pred =t1-t0 The indicator value of the rise time indicator is calculated in the following way, t prer =t2-t0 The index value of the adjustment time index is calculated in the following way: t preg =t3-t0 Among them, t pred is the response lag time indicator, t prer is the rise time indicator, t preg is the adjustment time index, t0 is the start time of the primary frequency modulation control response, t1 is the time when the active power change reaches 10% of the primary frequency modulation power target value for the first time, t2 is the time when the active power change reaches 90% of the primary frequency modulation power target value for the first time, and t3 is the start time when the active power continuously runs within ±5% of the primary frequency modulation power target value; The inertia response performance is analyzed by using the index value of the active climbing rate index, and the inertia response performance is analyzed according to the decoupling result, including: According to the actual change amount of the inertia response control active power, an actual change curve of the inertia response control active power is obtained; Based on the actual change curve of the inertia response control active power, an initial value and a target value of the inertia response regulation active power are obtained; Calculating an index value of an active power climbing rate index by adjusting an initial value and a target value of active power according to the inertia response; According to the inertia response, the initial value and target value of active power are adjusted, and the index value of the active power climbing rate index is calculated in the following manner: Among them, v wp is the active power ramp rate indicator, P0 and P1 are respectively the initial value and target of active power adjusted by inertia response; t s and t s They are the moment when the inertia response starts to be adjusted and the moment when the adjustment target is reached.

5. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 3.

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