CN115102189A - Wind power plant inertia frequency modulation power distribution and closed-loop control method, device and equipment - Google Patents

Abstract

The invention relates to the field of wind power plant group control, and provides a wind power plant inertia frequency modulation power distribution and closed-loop control method, device and equipment. The wind power plant inertia frequency modulation power distribution and closed-loop control method comprises the following steps: determining an inertia frequency modulation active power adjustment amount and a target unit to be adjusted, and generating an adjustment instruction according to the rotation speed constraint and the adjustable power constraint of the target unit; determining an inertia frequency modulation active power adjustment amount in real time in the process of executing the adjustment instruction by the target unit; and when the inertia frequency modulation active power adjustment quantity is larger than a set threshold value, performing secondary dynamic compensation. The embodiment of the invention also provides a corresponding device and equipment. The embodiment provided by the invention fully exerts the inertia frequency modulation capability of the adjustable unit, quickly adjusts the power of the whole field, and meets the field-level inertia frequency modulation target power requirement.

Description

Wind farm inertia frequency modulation power distribution and closed-loop control method, device and equipment

technical field

The invention relates to the field of wind farm group control, in particular to a wind farm inertia frequency modulation power distribution and closed-loop control method, a wind farm inertia frequency modulation power distribution and closed-loop control device, and a wind farm inertia frequency modulation power distribution and closed-loop control Device and a computer-readable storage medium.

Background technique

With the rapid growth of wind power installed capacity, the capacity of wind power centralized transmission is increasing. The output of wind turbines has strong fluctuation and uncertainty, which makes the large-scale wind power collection area show typical characteristics of high wind power penetration and weak local power grid. In the case of high-penetration wind power connection, the difficulty of primary frequency regulation of the power grid increases sharply. Therefore, it is necessary to fully exploit the primary frequency regulation capability of the existing wind turbines, so that the wind farm has the primary frequency regulation function and solve the difficulty of primary frequency regulation of the power grid.

Wind turbine inertia response control is a way to release the kinetic energy of the rotor of the wind turbine to realize power control, which can increase or decrease the output of the wind turbine in a short time to support the frequency change of the power grid. At present, the research on the station-level inertia frequency regulation of wind farms mainly focuses on the realization method of the field-level inertia frequency regulation, how to realize the distribution of the target value of the inertia frequency regulation of the single machine, but the rationality and accuracy of the allocation of the target value of the inertia frequency regulation of the single machine, and the implementation process. Few studies have been done on the effect of mid-field frequency modulation and subsequent compensation methods.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present invention is to provide a method, device and equipment for wind farm inertia frequency modulation power distribution and closed-loop control, which mainly solve the problems of poor adjustment effect and unreasonable adjustment power distribution of current wind turbines.

In order to achieve the above object, the first aspect of the present invention provides a wind farm inertial frequency modulation power distribution and closed-loop control method, the method includes: determining the inertial frequency modulation active power adjustment amount and the target unit to be adjusted, according to the target unit. The rotational speed constraint and the adjustable power constraint generate an adjustment command; in the process of executing the adjustment command by the target unit, the inertia frequency modulation active power adjustment amount is determined in real time; when the inertia frequency modulation active power adjustment amount is greater than the set threshold, the second time Dynamic compensation.

Preferably, generating the adjustment instruction according to the rotational speed constraint and the adjustable power constraint of the target unit includes: determining a rotational speed adjustment amount according to the current rotational speed of the target unit and the rotational speed constraint, and determining a first distribution coefficient according to the rotational speed adjustment amount; An adjustable power constraint is determined according to the current active power and rated power of the target unit, and a second distribution coefficient is determined according to the adjustable power constraint; the inertia of the target unit is determined according to the first distribution coefficient and the second distribution coefficient Frequency modulation to increase the power target; generating a corresponding adjustment command according to the inertia frequency modulation to increase the power target.

Preferably, determining the rotational speed adjustment amount according to the current rotational speed of the target unit and the rotational speed constraint, and determining the first distribution coefficient according to the rotational speed adjustment amount, including: determining the rotational speed upper limit in the rotational speed constraint according to the adjustment trend of the target unit Or the lower limit of the rotational speed is the reference rotational speed; the difference between the current rotational speed and the reference rotational speed is obtained as the rotational speed adjustment amount; the ratio of the rotational speed adjustment amount of the target unit to the sum of the rotational speed adjustment amounts of all the target units participating in the inertia frequency modulation is determined; The ratio serves as the first distribution coefficient.

Preferably, determining an adjustable power constraint according to the current active power and rated power of the target unit, and determining a second distribution coefficient according to the adjustable power constraint includes: determining the rated power according to an adjustment trend of the target unit and determining the adjustable power The upper or lower limit in the power constraint is the reference power; the difference between the current active power and the reference power is obtained as the power adjustment amount; the power adjustment amount of the target unit is determined in the sum of the power adjustment amounts of all target units participating in the inertia frequency modulation The ratio in ; take the ratio as the second distribution coefficient.

Preferably, determining the inertia frequency modulation and power boosting target of the target unit according to the first distribution coefficient and the second distribution coefficient includes: determining corresponding adjustment weights for the first distribution coefficient and the second distribution coefficient; A comprehensive coefficient is obtained from the first distribution coefficient, the second distribution coefficient and the corresponding adjustment weight; the inertia frequency modulation power-up target of the target unit is determined according to the inertia frequency modulation active power adjustment amount and the comprehensive coefficient.

Preferably, the real-time determination of the active power adjustment amount of inertia frequency modulation includes: determining the active power adjustment amount of inertia frequency modulation in a set period; correspondingly, the generation command of the secondary dynamic compensation is superimposed on the adjustment command in the previous cycle.

Preferably, the secondary dynamic compensation adopts a feedforward dual PI closed-loop control method; the feedforward dual PI closed-loop control method includes: using a current inner loop PI regulator for adjustment and using a voltage outer loop PI regulator for adjustment.

In the second aspect of the present invention, a wind farm inertia frequency modulation power distribution and closed-loop control device is also provided. The device includes: an adjustment command module for determining the inertia frequency modulation active power adjustment amount and the target unit to be adjusted. The rotational speed constraint and the adjustable power constraint of the target unit generate an adjustment instruction; and an adjustment monitoring module is used to determine the inertia frequency modulation active power adjustment amount in real time during the process of the target unit executing the adjustment instruction; When the power adjustment amount is greater than the set threshold, secondary dynamic compensation is performed.

In a third aspect of the present invention, there is also provided a wind farm inertial frequency modulation power distribution and closed-loop control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, so When the processor executes the computer program, it implements the steps of the aforementioned wind farm inertial frequency modulation power distribution and closed-loop control method.

In a fourth aspect of the present invention, there is also provided a computer-readable storage medium, where instructions are stored in the storage medium, when the storage medium runs on the computer, the computer enables the computer to perform the aforementioned wind farm inertia and frequency modulation power distribution and closed-loop control steps of the method.

A fifth aspect of the present invention provides a computer program product, including a computer program, which, when executed by a processor, implements the aforementioned method for power distribution and closed-loop control of wind farm inertia and frequency modulation.

The above technical solution at least has the following beneficial effects:

The invention considers the motor speed of the wind generator set and the upper and lower limits of the operating power of the wind turbine as constraints, realizes the reasonable distribution of the power target of the inertia frequency regulation of the wind farm in different operating states, and dynamically considers the execution capability of the inertia frequency regulation target power of the wind turbine, relying on the feedforward double PI The closed-loop control performs the secondary dynamic compensation allocation of the unit power target, avoiding that some units cannot fully execute the inertia frequency regulation command due to their own reasons, resulting in the full field regulation not meeting the standard, giving full play to the inertia frequency regulation ability of the adjustable unit, and quickly adjusting the entire field power to meet the The target power demand of field-level inertia frequency regulation can also be avoided. At the same time, it can also avoid faults such as wind turbines being disconnected from the grid due to unreasonable inertia response power distribution of grid-connected wind turbines in the field, which affects the adjustment effect of the entire field.

Other features and advantages of embodiments of the present invention will be described in detail in the detailed description section that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the embodiments of the present invention, and constitute a part of the specification, and are used to explain the embodiments of the present invention together with the following specific embodiments, but do not constitute limitations to the embodiments of the present invention. In the attached image:

FIG. 1 schematically shows an implementation schematic diagram of a wind farm inertial frequency modulation power distribution and closed-loop control method according to an embodiment of the present invention;

FIG. 2 schematically shows a schematic flowchart of a field-level inertia frequency modulation logic according to an embodiment of the present invention;

FIG. 3 schematically shows a schematic structural diagram of a wind farm inertial frequency modulation power distribution and closed-loop control device according to an embodiment of the present invention.

Detailed ways

The specific implementations of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention.

FIG. 1 schematically shows an implementation schematic diagram of a wind farm inertial frequency modulation power distribution and closed-loop control method according to an embodiment of the present invention. As shown in Figure 1, the method includes:

S01, determine the inertia frequency modulation active power adjustment amount and the target unit to be adjusted, and generate an adjustment instruction according to the rotational speed constraint and the adjustable power constraint of the target unit; wherein the determination of the inertia frequency modulation active power adjustment amount can adopt the following methods: field-level control The inverter obtains the frequency change rate df/dt of the outgoing line at the grid connection point of the wind farm through the high-performance frequency acquisition device, and calculates the active power adjustment ΔP of the inertia frequency modulation of the whole field according to the grid standard;

Among them, T _J is the inertia time constant of the station; f _N is the rated frequency of the system; f is the frequency of the grid connection point; P _N is the rated capacity of the station. At the same time, according to the requirements of the power grid, the inertia frequency modulation active power adjustment amount ΔP is limited, which is generally 10% of the rated capacity of the entire field.

The target unit to be adjusted can be determined in the following way: according to the upper and lower limits of the normal operating speed of the wind turbine, the upper and lower limits of the inertia frequency modulation speed are set, and the entire operating unit is divided into units that can participate in inertia frequency modulation and those that cannot participate in inertia. For frequency-modulated units, only the inertia-frequency-modulated target power is allocated to the participating units. At the same time, in the process of inertia adjustment, when the unit speed exceeds the upper and lower limit of inertia frequency modulation speed, it will exit inertia frequency modulation and restore the original power.

For the target power distribution of the units that can participate in the inertia frequency modulation unit, consider the motor speed and the adjustable power margin when the unit is running, and issue the unit inertia frequency modulation power target for the first cycle.

S02. In the process of executing the adjustment instruction by the target unit, determine the active power adjustment amount of inertia frequency modulation in real time; when the active power adjustment amount of inertia frequency modulation is greater than a set threshold, perform secondary dynamic compensation.

Since the inertia frequency modulation power target allocation in the prior art is too ideal, the fact that the unit cannot actually execute the inertia frequency modulation target command is not considered, and the field-level inertia frequency modulation target cannot be accurately executed. In this step, a feedforward double PI closed-loop control link is added. If the difference between the actual value of the active power P _act and the set value P _set =P ₀ +ΔP within the set period (which can be set according to the grid standard) still cannot meet the whole When the rated capacity of the field is 1% (which can be set according to the grid standard), the secondary dynamic compensation distribution of the unit power target will be carried out to give full play to the inertia and frequency regulation ability of the adjustable unit, and increase the adjustment target of the adjustable unit. The compensation action is not in place. The adjustment amount of the unit ensures that the target power demand of the field-level inertia frequency regulation is met.

Through the above steps in this embodiment, the adjustment efficiency and adjustment effect of the inertial frequency modulation power of the wind farm can be improved.

In some embodiments provided by the present invention, generating the adjustment instruction according to the rotational speed constraint and the adjustable power constraint of the target unit includes: determining a rotational speed adjustment amount according to the current rotational speed of the target unit and the rotational speed constraint, and adjusting the rotational speed according to the rotational speed constraint. determine the first distribution coefficient; determine the adjustable power constraint according to the current active power and rated power of the target unit; determine the second distribution coefficient according to the adjustable power constraint; according to the first distribution coefficient and the second distribution coefficient Determine the inertia frequency modulation and power increase target of the target unit; generate a corresponding adjustment command according to the inertia frequency modulation and power increase target. The speed constraint means that the speed adjustment of the wind turbine should not exceed the speed operating range, which includes the upper and lower speed limits. The first distribution coefficient is determined according to the rotation speed adjustment amount determined by the rotation speed constraint, and the distribution coefficient may be obtained by mapping according to an existing preset rule, or may be obtained according to an existing empirical model. Similarly, the adjustable power constraint also needs to be considered in the adjustment process, and the adjustable power also has an upper limit and a lower limit. The second distribution coefficient is determined according to the adjustable power, and the determination method can be selected arbitrarily, which can be the same as or different from the determination method of the first distribution coefficient.

In some embodiments provided by the present invention, determining the rotation speed adjustment amount according to the current rotation speed of the target unit and the rotation speed constraint, and determining the first distribution coefficient according to the rotation speed adjustment amount, includes: determining the rotation speed adjustment according to the adjustment trend of the target unit. The rotational speed upper limit or rotational speed lower limit in the rotational speed constraint is the reference rotational speed; the difference between the current rotational speed and the reference rotational speed is obtained as the rotational speed adjustment amount; the rotational speed adjustment amount of the target unit is determined in the rotational speed adjustment of all target units participating in the inertia frequency modulation The ratio in the sum of the quantities; the ratio is taken as the first distribution coefficient. This embodiment provides a method for determining a first distribution coefficient, where the ratio of the rotational speed adjustment amount is used as the first distribution coefficient. An example of the calculation process is as follows: for a unit i with increased power, the speed constraint margin ω _{up, i} = ω _0,i -ω _min , where ω _0,i is the current motor speed of unit i, and ω _min is the participation of unit i. The lower limit of the rotational speed of inertia frequency regulation, the total rotational speed constraint margin of all units participating in inertia frequency regulation ω _up = Σω _up,i , then the unit i liter power rotational speed constraint distribution coefficient, that is, the first distribution coefficient a _{up, i} = ω _{up, i} /ω _up . Similarly, for the reduced power unit i, the speed constraint margin ω _{down, i} = ω _max -ω _0,i , where ω _0,i is the current motor speed of unit i, and ω _max is the inertia of unit i participating in The upper limit of the rotational speed of the frequency regulation, the total rotational speed constraint margin of all units participating in the inertia frequency regulation is ω _down =Σω _down,i , then the unit i reduces the power and rotational speed constraint distribution coefficient, that is, the first distribution coefficient a _down,i =ω _down,i /ω _down .

In some optional embodiments provided by the present invention, determining an adjustable power constraint according to the current active power and rated power of the target unit, and determining a second distribution coefficient according to the adjustable power constraint includes: adjusting according to the target unit The trend determines that the rated power determines the upper limit or lower limit in the adjustable power constraint as the reference power; obtains the difference between the current active power and the reference power as the power adjustment amount; determines that the power adjustment amount of the target unit is in all participating inertias. The ratio in the total power adjustment amount of the target generator set for frequency regulation; the ratio is used as the second distribution coefficient. This embodiment provides a method for determining the second distribution coefficient, where the ratio of the power adjustment amount is used as the first distribution coefficient. An example of the calculation process is as follows: for a unit i with increased power, the adjustable power margin C _{up of the unit i, i} =C _max -p _0,i , where C _max is the rated capacity of the unit, and p _0,i is the current unit's current capacity. Active power, the total adjustable power headroom C _up =∑C _up,i of all participating inertia frequency modulation units, then the adjustable power headroom distribution coefficient b _up,i =C _up,i /C _up of the unit i liter power. Similarly, for the reduced power unit i, the adjustable power margin C _{down of the unit i, i} = p _0,i -C _min , where C _min is the minimum operating capacity of the unit, and p _0,i is the current Active power, the total adjustable power headroom C _down =ΣC _down,i of all participating inertia frequency modulation units, then the adjustable power headroom distribution coefficient b _down,i =C _down,i /C _down for the power reduction of unit i.

In some optional embodiments provided by the present invention, determining the inertia frequency modulation and power raising target of the target unit according to the first distribution coefficient and the second distribution coefficient includes: for the first distribution coefficient and the second distribution coefficient The distribution coefficient determines the corresponding adjustment weight; the comprehensive coefficient is obtained according to the first distribution coefficient, the second distribution coefficient and the corresponding adjustment weight; the target unit is determined according to the inertia frequency modulation active power adjustment amount and the comprehensive coefficient The inertia FM boost power target. The aforementioned embodiment obtains a comprehensive coefficient by synthesizing the first and second distribution coefficients calculated above to calculate the final power distribution. In this embodiment, an algorithm for the comprehensive coefficient is provided to improve the distribution. efficiency. It is also divided into two cases: the power-up unit and the power-down unit. For unit i of 1 liter power, the comprehensive coefficient is equal to (k ₁ a _up,i +k ₂ b _up,i ), where k ₁ and k ₂ are the weights of the liter power motor speed and the adjustable power margin, k ₁ +k ₂ = 1. Correspondingly, the inertia frequency modulation up power target of unit i is p _{up, i} =ΔP×(k ₁ a _{up, i} +k ₂ b _{up, i} ). Meanwhile, limited by the capacity of unit i, p _up,i ≤C _max -p _0,i . For the reduced power unit i, the comprehensive coefficient is equal to (k ₃ a _down,i +k ₄ b _down,i ), where k ₃ and k ₄ are the weights of the reduced power motor speed and the adjustable power margin, k ₃ +k ₄ = 1. Then the inertia frequency modulation power reduction target of unit i is p _{down, i} =ΔP×(k ₃ a _{down, i} +k ₄ b _{down, i} ). At the same time, it is limited by the minimum operating capacity of unit i, p _down,i ≤p _0,i -C _min .

In some embodiments provided by the present invention, determining the active power adjustment amount of inertia frequency modulation in real time includes: determining the active power adjustment amount of inertia frequency modulation with a set period; correspondingly, the generation instruction of the secondary dynamic compensation is superimposed on the previous in the adjustment instruction in the cycle. This embodiment provides a technical solution for performing adjustment monitoring during the process of executing the adjustment instruction by the target unit. The setting period here can be set according to the grid standard, or can be set according to the actual scene. The setting cycle may also be the calculation cycle or the transmission cycle of the adjustment command. When there is secondary dynamic compensation, the two adjustment instructions are superimposed according to the cycle, and there is a certain time shift between the superimposed cycles.

In some embodiments provided by the present invention, the secondary dynamic compensation adopts a feedforward dual PI closed-loop control method; the feedforward dual PI closed-loop control method includes: using a current inner loop PI regulator for adjustment and using a voltage outer loop for adjustment PI adjuster to adjust. The feedforward dual PI closed-loop control method is a control method that adopts voltage closed-loop and current closed-loop respectively, and has the advantages of fast dynamic response speed and good control effect. The introduction of feedforward compensation actually uses open-loop control to compensate the measurable disturbance signal, so it will not change the characteristics of the control system. The current inner loop PI regulator in this embodiment includes a PI controller and a delay device, and adds a current signal sampling delay link and a delay link of the PWM device. The parameters of its specific settings are determined by the transfer function. Similarly, the voltage outer loop PI regulator also adopts similar design steps. In the case of considering the sampling delay of the outer loop voltage signal, the transfer function of the DC voltage controller is determined, and the PI parameters of the DC voltage controller are determined through the corresponding closed-loop characteristic equation, etc.

FIG. 2 schematically shows a schematic flowchart of the field-level inertia frequency modulation logic according to an embodiment of the present invention, as shown in FIG. 2 . The schematic flowchart includes: calculating ΔP according to the frequency change rate, and determining the units that can participate in the inertia frequency modulation, that is, the aforementioned target unit to be adjusted. According to the positive and negative relationship of ΔP, it is determined whether the power should be adjusted up or down. And in the adjustment process, according to the speed constraints and adjustable power, determine the unit power increase target or decrease power target and issue it, and judge whether the current frequency regulation requirement of the whole field is satisfied, and end the regulation when it is satisfied. When it is not satisfied, the single adjustment amount ΔP of the whole field is calculated by the feedforward double PI, and is allocated and issued according to the aforementioned method until the requirements are satisfied.

Based on the same inventive concept, an embodiment of the present invention also provides a wind farm inertia frequency modulation power distribution and closed-loop control device. FIG. 3 schematically shows a schematic structural diagram of a wind farm inertial frequency modulation power distribution and closed-loop control device according to an embodiment of the present invention. As shown in FIG. 3 , the device includes: an adjustment command module for determining an inertia frequency modulation active power adjustment amount and a target unit to be adjusted, and generating an adjustment command according to the rotational speed constraint and adjustable power constraint of the target unit; and adjustment monitoring The module is used to determine the active power adjustment amount of inertia frequency modulation in real time during the process of executing the adjustment instruction by the target unit; when the active power adjustment amount of inertia frequency modulation is greater than the set threshold, perform secondary dynamic compensation.

In some optional implementation manners, generating the adjustment instruction according to the rotational speed constraint and the adjustable power constraint of the target unit includes: determining a rotational speed adjustment amount according to the current rotational speed of the target unit and the rotational speed constraint, and determining a rotational speed adjustment amount according to the rotational speed adjustment amount A first distribution coefficient; an adjustable power constraint is determined according to the current active power and rated power of the target unit, and a second distribution coefficient is determined according to the adjustable power constraint; the first distribution coefficient and the second distribution coefficient are determined. Inertia frequency modulation and power increase target of the target unit; generating a corresponding adjustment command according to the inertia frequency modulation and power increase target.

In some optional implementation manners, determining a rotational speed adjustment amount according to the current rotational speed of the target unit and the rotational speed constraint, and determining a first distribution coefficient according to the rotational speed adjustment amount, including: determining the rotational speed according to an adjustment trend of the target unit The upper limit or lower limit of the rotational speed in the constraint is the reference rotational speed; the difference between the current rotational speed and the reference rotational speed is obtained as the rotational speed adjustment amount; the rotational speed adjustment amount of the target unit is determined as the sum of the rotational speed adjustment amounts of all the target units participating in the inertia frequency modulation The ratio in ; take the ratio as the first distribution coefficient.

In some optional implementations, determining an adjustable power constraint according to the current active power and rated power of the target unit, and determining a second distribution coefficient according to the adjustable power constraint includes: determining the said target unit according to an adjustment trend of the target unit The rated power determines the upper or lower limit in the adjustable power constraint as the reference power; obtains the difference between the current active power and the reference power as the power adjustment amount; determines that the power adjustment amount of the target unit is in all the target units participating in the inertia frequency regulation. The ratio in the sum of the power adjustment amounts of ; the ratio is used as the second distribution coefficient.

In some optional implementation manners, determining the inertia frequency modulation and power boosting target of the target unit according to the first distribution coefficient and the second distribution coefficient includes: determining a correspondence between the first distribution coefficient and the second distribution coefficient according to the first distribution coefficient, the second distribution coefficient and the corresponding adjustment weight to obtain a comprehensive coefficient; according to the inertia frequency modulation active power adjustment amount and the comprehensive coefficient to determine the inertia frequency modulation increase of the target unit power target.

In some optional implementation manners, the determining the active power adjustment amount of inertia frequency modulation in real time includes: determining the active power adjustment amount of inertia frequency modulation in a set period; correspondingly, the generation instruction of the secondary dynamic compensation is superimposed on the previous cycle in the adjustment command.

In some optional embodiments, the secondary dynamic compensation adopts a feedforward dual PI closed-loop control method; the feedforward dual PI closed-loop control method includes: using a current inner loop PI regulator for adjustment and using a voltage outer loop PI adjustment device to adjust.

For the specific limitations of each functional module in the above-mentioned wind farm inertia frequency modulation power distribution and closed-loop control device, please refer to the above definition of the wind farm inertia frequency modulation power distribution and closed-loop control method, which will not be repeated here. Each module in the above apparatus may be implemented in whole or in part by software, hardware and combinations thereof. The above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

In some embodiments provided by the present invention, a wind farm inertia frequency modulation power distribution and closed-loop control device is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor , when the processor executes the computer program, implements the steps of the aforementioned wind farm inertial frequency modulation power distribution and closed-loop control method. The processor here has the functions of numerical calculation and logical operation, and it has at least a central processing unit CPU, random access memory RAM, read-only memory ROM, various I/O ports and an interrupt system with data processing capability. The processor includes a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can set one or more, and the aforementioned method can be implemented by adjusting the kernel parameters. Memory may include non-persistent memory in computer readable media, random access memory (RAM) and/or non-volatile memory, such as read only memory (ROM) or flash memory (flash RAM), the memory including at least one memory chip.

In one embodiment of the present invention, there is also provided a computer-readable storage medium, the storage medium having instructions stored therein, when executed on a computer, the instructions, when executed by a processor, cause the processor to be It is configured to execute the above-mentioned wind farm inertial frequency modulation power distribution and closed-loop control method.

In an embodiment provided by the present invention, a computer program product is provided, including a computer program, which, when executed by a processor, implements the above-mentioned method for power distribution and closed-loop control of wind farm inertia and frequency modulation.

As will be appreciated by those skilled in the art, the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block in the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

Memory may include non-persistent memory in computer readable media, random access memory (RAM) and/or non-volatile memory in the form of, for example, read only memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.

Computer-readable media includes both persistent and non-permanent, removable and non-removable media, and storage of information may be implemented by any method or technology. Information may be computer readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), Flash Memory or other memory technology, Compact Disc Read Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media, such as modulated data signals and carrier waves.

It should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Other elements not expressly listed, or which are inherent to such a process, method, article of manufacture, or apparatus are also included. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article of manufacture or apparatus that includes the element.

The above are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims (10)

1. A wind farm inertia frequency modulation power distribution and closed-loop control method, characterized in that the method comprises: Determine the inertia frequency modulation active power adjustment amount and the target unit to be adjusted, and generate an adjustment command according to the rotational speed constraint and the adjustable power constraint of the target unit; During the process of executing the adjustment command by the target unit, the active power adjustment amount of inertia frequency modulation is determined in real time, and secondary dynamic compensation is performed when the active power adjustment amount of inertia frequency modulation is greater than the set threshold. 2. The method according to claim 1, wherein generating an adjustment instruction according to the rotational speed constraint and the adjustable power constraint of the target unit, comprising: Determine a rotational speed adjustment amount according to the current rotational speed of the target unit and the rotational speed constraint, and determine a first distribution coefficient according to the rotational speed adjustment amount; Determine an adjustable power constraint according to the current active power and rated power of the target unit, and determine a second distribution coefficient according to the adjustable power constraint; Determine the inertia frequency modulation and power increase target of the target unit according to the first distribution coefficient and the second distribution coefficient; A corresponding adjustment command is generated according to the inertia frequency modulation and power increase target. 3. The method according to claim 2, wherein determining a rotational speed adjustment amount according to the current rotational speed of the target unit and the rotational speed constraint, and determining a first distribution coefficient according to the rotational speed adjustment amount, comprising: Determine, according to the adjustment trend of the target unit, the upper speed limit or the lower speed limit in the speed constraint as the reference speed; Obtaining the difference between the current rotational speed and the reference rotational speed as a rotational speed adjustment amount; Determine the ratio of the rotational speed adjustment of the target unit to the sum of the rotational speed adjustments of all target units participating in the inertia frequency modulation; The ratio is used as the first distribution coefficient. 4. The method according to claim 2, wherein determining an adjustable power constraint according to the current active power and rated power of the target unit, and determining a second distribution coefficient according to the adjustable power constraint, comprising: Determine the rated power according to the adjustment trend of the target unit and determine the upper limit or lower limit in the adjustable power constraint as the reference power; Obtaining the difference between the current active power and the reference power as a power adjustment amount; Determine the ratio of the power adjustment of the target unit to the sum of the power adjustments of all target units participating in the inertia frequency modulation; The ratio is used as the second distribution coefficient. 5. The method according to claim 2, wherein determining the inertia frequency modulation and power-up target of the target unit according to the first distribution coefficient and the second distribution coefficient, comprising: determining corresponding adjustment weights for the first distribution coefficient and the second distribution coefficient; Obtain a comprehensive coefficient according to the first distribution coefficient, the second distribution coefficient and the corresponding adjustment weight; According to the inertia frequency modulation active power adjustment amount and the comprehensive coefficient, the inertia frequency modulation power increase target of the target unit is determined. 6. The method according to claim 2, wherein the determining the real-time inertial frequency modulation active power adjustment comprises: Determine the active power adjustment amount of inertia frequency modulation with the set period; Correspondingly, the generation instruction of the secondary dynamic compensation is superimposed on the adjustment instruction in the previous cycle. 7. The method according to claim 2, wherein the secondary dynamic compensation adopts a feedforward dual PI closed-loop control method; The feedforward dual PI closed-loop control method includes: using a current inner loop PI regulator for adjustment and using a voltage outer loop PI regulator for adjustment. 8. A wind farm inertia frequency modulation power distribution and closed-loop control device, wherein the device comprises: an adjustment command module, configured to determine an inertia frequency modulation active power adjustment amount and a target unit to be adjusted, and generate an adjustment command according to the rotational speed constraint and the adjustable power constraint of the target unit; and The adjustment monitoring module is used to determine the active power adjustment amount of inertia frequency modulation in real time during the process of executing the adjustment instruction by the target unit; when the active power adjustment amount of inertia frequency modulation is greater than the set threshold, perform secondary dynamic compensation. 9. A wind farm inertial frequency modulation power distribution and closed-loop control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the When the computer program is described, the steps of implementing the method for power distribution and closed-loop control by inertia of the wind farm according to any one of claims 1 to 7. 10. A computer-readable storage medium having instructions stored therein which, when run on a computer, cause the computer to perform the wind farm inertia frequency modulation power distribution of any one of claims 1 to 7 and the steps of the closed-loop control method.

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