Coordinated control method for wind power plant of double-fed fan to participate in one-time frequency modulation of power system

Abstract

The present invention relates to a coordinated control method for the wind power plant of a double-fed fan to participate in the one-time frequency modulation of a power system and belongs to the operation and control technical field of the power system. The method comprises the steps of establishing energy status evaluation indexes and power generation level evaluation indexes for fans; setting a communication coefficient matrix between fans; measuring the frequency of the coordination layer of the wind power plant and generating the reference value of the output power of the wind power plant; exchanging power generation level evaluation indexes between adjacent fans, conducting the Newton iteration through the outer loop iteration method, and tracking a reference value generated by the coordination layer; during each iteration step, calculating the approximate Newton direction of the step by each fan through the inner loop recursion method. In this way, the necessary information is provided for the outer loop iteration operation. According to the technical scheme of the invention, the stored kinetic energy of a double-fed fan can be fully utilized, and a coordinated control system is designed to reduce the computational burden of the coordination layer. Meanwhile, based on the second-order convergence of the distributed Newton method, the rapid primary frequency modulation of the overall wind power plant is realized. At the same time, the power can be reasonably distributed among fans, so that the safe operation of the fans is ensured.

Description

technical field [0001] The invention relates to a coordinated control method for a double-fed fan wind farm participating in primary frequency modulation of a power system, and belongs to the technical field of power system operation and control. Background technique [0002] Environmental issues drive the innovation and transformation of the power system, and the development of renewable energy power generation can optimize the energy structure, promote energy conservation and emission reduction, and achieve sustainable economic development. As one of the most representative forms of renewable energy power generation, wind power is widely considered to be an effective alternative to traditional thermal power generation. The rapid development of wind power generation is gradually changing the traditional operation mode of the power system. The most obvious problem caused by the integration of large-scale high-penetration wind power generation is that due to the randomness a...

AI Technical Summary

Problems solved by technology

However, due to the large number of wind turbines in large-scale wind farms and their geographical distribution, centralized control requires the construction of a complex communication network and relies heavily on the wind farm centralized controller

If the centralized controller of the wind farm fails, the entire system will be paralyzed, so the reliability is very low, and the centralized model maintenance and optimization calculation will consume a lot of time, which is not suitable for primary frequency regulation that requires high response speed

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