Active power optimization control method for distributed wind farms equipped with energy storage power stations

Abstract

The invention relates to a distributed wind farm active power optimization and control method equipped with an energy storage power station. And the power generation characteristics of the energy storage power supply unit, and establish the active power output constraint conditions. According to the external conditions of wind farm operation, it is divided into power-restricted operation and unrestricted power operation. The power-restricted operation is optimized with the minimum pitch control load, line loss and frequency fluctuation; the unrestricted power operation is based on the maximum wind energy capture efficiency and line loss. The minimum loss and the minimum frequency fluctuation are the optimization objectives, and the multi-objective hierarchical optimization problem is used as the objective function. The particle swarm algorithm is used to solve it. This research minimizes and stabilizes the output of wind power active power output through the energy storage system, so as to realize the effective connection between the energy storage system and the existing dispatching operation mode, and at the same time achieve the best economic benefits.

Description

technical field [0001] The invention relates to an active power optimization control method for a decentralized wind farm equipped with an energy storage power station, and belongs to the technical field of active power control for grid-connected operation of wind farms. Background technique [0002] As the country attaches great importance to renewable energy power generation, my country's wind power has become an important emerging industry to optimize the energy structure and promote sustainable development. However, after the large-scale wind power is connected to the grid, the security, reliability, power quality and grid dispatching of the power system will be affected by the volatility and randomness of wind power generation. The centralized large power grid has strong coupling and cannot track changes flexibly and reliably. The decentralized access wind power project refers to the wind power project located near the power load center, not for the purpose of large-sc...

AI Technical Summary

Problems solved by technology

[0007] The invention provides a distributed wind farm active power optimization control method equipped with an energy storage power station. Based on the different operating conditions of the field, a multi-objective function can be established, which can effectively control the frequency fluctuation and at the same time reduce the wind turbine pitch load and reduce the active power loss of the wind farm

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