DFIG风电机组有功控制对电网频率的影响
摘要:基于双馈风机的风电场大规模并网会降低电网等效惯量，频率调节能力变差。为使风电机组也能参与电网的频率调节，提出在转子侧附加虚拟惯量控制和超速控制的调频策略，使风电机组有类似同步发电机的静态调频特性。虚拟惯量能够释放转子动能，为频率提供短暂支撑；超速控制留出备用容量，弥补惯量控制引起的频率二次跌落，并减小稳态误差。最后，仿真分析了大规模风电场接入上海电网时风电参与调频对上海电网频率的影响。
Abstract：Large-scale grid-connected wind farms based on doubly fed induction generators (DFIGs) would reduce system equivalent inertia, and the ability of primary frequency control would deteriorate. In order to make the wind turbine can participate in the frequency adjustment of power grid, this paper proposes the frequency control strategy that adds the virtual inertia control and over-speed control on the rotor side, so that DFIGs have similar static frequency regulation performance of the synchronous generator. The virtual inertia control can release the kinetic energy of the rotor and provide short-term support for the frequency; the over-speed control can gain reserve capacity, compensate the secondary drop in the frequency caused by the inertia control, and reduce the steady-state error. Finally, this paper simulates and analyzes the influence of wind power participating in the frequency adjustment on the Shanghai power grid frequency during the large-scale wind farm access to the Shanghai power grid.
标题：DFIG风电机组有功控制对电网频率的影响
title:Influence of DFIG Active Power Control on Power Grid Frequency
作者：张旭航,赵晶晶,李敏
authors:ZHANG Xuhang,ZHAO Jingjing,LI Min
关键词：双馈风机,虚拟惯量控制,超速控制,一次调频,
keywords:doubly fed induction generator,virtual inertia control,over-speed control,primary frequency control,
发表日期：2018-03-21
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