Method for optimizing and regulating and controlling active power of distributed wind power plant with energy storage power station

Abstract

The invention relates to a method for optimizing and regulating and controlling active power of a distributed wind power plant with an energy storage power station. According to the method, the constraint condition is set to top and bottom limitation constraint output by the active power and maximum and minimum limiting values of single body power generation according to the wind power net-in guide rule, and the output constraint condition of the active power is set up according to the wind power and energy storage power source single body power generation characteristic. According to the external condition of wind power plant operation, the method is divided into limited power operation and unlimited power operation, the optimization objective of the limited power operation is to enable pitch control loads, line loss and frequency fluctuation to be minimum, the optimization objective of the unlimited power operation is to enable wind energy capture efficiency to be maximum and the line loss and the frequency fluctuation to be minimum, and the objective function of the unlimited power operation is the multiple target layered optimization problem. The particle swarm optimization is used for carrying out solution. According to the method, the wind power active power output under the effect of an energy storage system is output stably with minimized loss, and therefore effective connection between the energy storage system and an existing scheduling operation mode and optimum economic benefits are achieved.

Description

technical field [0001] The invention relates to an active power optimization control method for a distributed wind farm equipped with an energy storage power station, and belongs to the technical field of active power control for wind farm grid-connected operation. 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 for optimizing energy structure and promoting sustainable development. However, with the large-scale wind power 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. Distributed access wind power projects refer to wind power projects that are located near the power load center and do not aim at large-scale long-distan...

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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