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Wind storage combined power station participated frequency modulation optimization control method, system and equipment and medium

A wind-storage combination and optimal control technology, which is applied in the direction of AC network load balancing, reduction/prevention of power oscillation, single-network parallel feeding arrangement, etc., can solve problems such as the decrease of power grid frequency stability, and achieve output drop avoidance and frequency improvement Effects of Response Properties

Pending Publication Date: 2022-07-22
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of reduced grid frequency stability under high wind power penetration, the present invention proposes a frequency regulation optimization control method for wind-storage combined power plants, including:

Method used

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  • Wind storage combined power station participated frequency modulation optimization control method, system and equipment and medium
  • Wind storage combined power station participated frequency modulation optimization control method, system and equipment and medium
  • Wind storage combined power station participated frequency modulation optimization control method, system and equipment and medium

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Embodiment 1

[0101] The present invention provides an optimal control method for participating in frequency regulation of a wind-storage combined power station, including primary frequency regulation control and secondary frequency regulation control.

[0102] When a frequency modulation is required, the primary frequency modulation control of the fan is determined based on the interval of the wind speed, and the output of the energy storage system is adjusted in coordination with the frequency modulation control of the fan. First, based on the frequency response characteristics of the fan, a wind speed segmentation method is proposed. , determine the wind speed range of the fan participating in the primary frequency modulation; then based on the frequency variation characteristics of the inertia response and frequency recovery in the primary frequency modulation process, the wind-storage combined primary frequency modulation control strategy is proposed, such as figure 1 shown, including t...

Embodiment 2

[0131]In order to realize a wind-storage combined power station participating in the frequency regulation optimization control method, the present invention also provides a wind-storage combined power station participating in the frequency regulation optimization control system, such as Figure 5 shown, including:

[0132] The primary frequency modulation control module is used to determine the primary frequency modulation control of the fan based on the interval where the wind speed is located, and adjust the output of the energy storage system in conjunction with the frequency modulation control of the fan;

[0133] The reference value determination module is used to determine the reference value of the wind turbine power variation and the reference value of the energy storage power variation with the goal of the minimum cost of the frequency-modulated power supply participating in the automatic power generation control;

[0134] The secondary frequency modulation control mo...

Embodiment 3

[0149] Based on the same inventive concept, the present invention also provides a computer device, the computer device includes a processor and a memory, the memory is used for storing a computer program, the computer program includes program instructions, and the processor is used for executing the Program instructions stored by the computer storage medium. The processor may be a central processing unit (Central Processing Unit, CPU), or other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays ( Field-Programmable GateArray, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc., which are the computing core and control core of the terminal, which are suitable for implementing one or more instructions, specifically suitable for loading And execute o...

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Abstract

The invention provides a wind storage combined power station participation frequency modulation optimization control method, system and device and a medium. During primary frequency modulation, rotor kinetic energy is controlled and released through fan virtual inertia so as to damp frequency drop in an inertia response stage; the defect of later output reduction of the fan is overcome through energy storage, the problem of secondary frequency drop caused by the fan is avoided, and the frequency response characteristic of the system in the primary frequency modulation stage is effectively improved; during secondary frequency modulation, a fan power variable quantity reference value and an energy storage power variable quantity reference value are determined by taking the minimum cost of a frequency modulation power supply participating in automatic power generation control as a target, and secondary frequency modulation control is performed based on the fan power variable quantity reference value and the energy storage power variable quantity reference value. And the energy storage service life can be prolonged, and meanwhile, the dynamic frequency characteristic of the system can be improved.

Description

technical field [0001] The invention relates to the field of power system operation control, in particular to a wind-storage combined power station participating in a frequency regulation optimization control method, system, equipment and medium. Background technique [0002] In recent years, new energy sources represented by wind power have developed rapidly. Due to the low rotor inertia of wind turbines and currently mainly operating in the maximum power tracking mode, they generally lack the ability to actively support the grid similar to conventional synchronous generator inertia support and primary frequency regulation. However, with the continuous increase of wind power penetration, it is difficult to meet the requirements of grid frequency stability under the existing control methods. Therefore, existing studies have proposed technologies such as virtual inertia control, overspeed load shedding control, and pitch control to enhance the ability of wind turbines to part...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/32H02J3/24H02J3/46
CPCH02J3/381H02J3/32H02J3/241H02J3/466
Inventor 桑丙玉李克成董存陶以彬杨波吴福保王士柏孙树敏程艳王强强
Owner CHINA ELECTRIC POWER RES INST
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