Wind power plant reactive optimization control method considering DFIG reactive output capacity

Abstract

The invention discloses a wind power plant reactive optimization control method considering DFIG reactive output capacity. The wind power plant reactive optimization control method comprises the stepsof obtaining system data and predictive data of each DFIG in a large-scale wind power plant; by combination of a kinetic model of a wind turbine, calculating the active output predictive value of each DFIG; by combination of the DFIG reactive output characteristic, calculating the reactive output upper limit and lower limit of each DFIG; by taking the minimum wind power plant internal active power grid loss, the maximum reactive margin, and the minimum common grid-connected point voltage deviation as the target, establishing a multi-object optimization function; by taking the DFIG reactive output upper limit and lower limit, SVC reactive output upper limit and lower limit and the common grid-connected point voltage deviation as constraint conditions, establishing a constraint condition function; and solving an optimization model formed by the optimization target function and the constraint condition by adopting a genetic algorithm to form the wind power plant reactive optimization control method which can satisfy requirements.

Description

technical field [0001] The invention belongs to the technical field of wind farm operation control, and in particular relates to a wind farm reactive power optimization control method considering the reactive power output capability of DFIG. Background technique [0002] With the increasing installed capacity of large-scale wind farms, it is of great significance to study the internal power distribution of wind farms to improve system safety, economy and stability. The wide use of DFIG also enables wind farms to further implement reactive power optimization control. conditions of. To study the optimal control of reactive power inside a wind farm, the following aspects need to be considered: 1. Reasonably arrange the active and reactive power output of each DFIG to reduce the internal active power loss of the wind farm; Reactive power margin; 3. Improve the voltage quality of the public grid-connected point of the wind farm, and reduce the impact of the wind farm on the volt...

AI Technical Summary

Problems solved by technology

[0003]Currently, domestic and foreign scholars mostly focus on the capacity, operating characteristics and control strategies of reactive power compensation devices in wind farms, without considering reactive power optimization at the wind farm level control, and did not make full use of DFIG's reactive power output capability

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