并网双馈感应风电系统轴系振荡抑制控制策略研究
摘要:外界扰动将引起并网双馈感应发电机（doubly-fed induction generator，DFIG）型风电系统产生弱/负阻尼轴系振荡，还可能引发风电并网系统低频振荡，不利于风电系统自身及其所并电网的动态稳定运行。从提高并网DFIG风电系统轴系振荡阻尼的角度出发，基于DFIG电磁转矩对轴系振荡的作用机理，结合系统中转矩和有功功率的产生、传递特性，设计2种置于系统转子侧变换器（rotor side converter，RSC）功率控制环节的轴系振荡抑制控制策略，并利用DIgSILENT/PowerFactory仿真平台建模，进而对各控制策略的有效性进行了仿真验证。结果表明，所提出的2种控制策略分别在最大风能跟踪（maximum power point tracking，MPPT） 控制模式和恒功率控制模式下，显著改善轴系振荡阻尼，提升轴系动态特性。
Abstract：Under external disturbance, the shafting oscillation with weak/negative-damping generally occurs in grid-connected doubly-fed induction generator （DFIG）-based wind power generation system, which may lead to the low-frequency oscillation in the connected power grid and weaken the dynamic stability of the DFIG system and the power system. For improving the shafting oscillation damping of the grid-connected DFIG-based wind power conversion system, this paper designs two suppression control strategies of shafting oscillation implemented in RSC （rotor side converter） power control sections, which is based on the motivation mechanism of the DFIG electromagnetic torque on the shafting oscillation damping and the characteristics of the generation and transfer for the torque and active power in the DFIG-based wind power generation system. Furthermore, the effectiveness of the proposed control strategies is verified by the simulation results on DIgSILENT/PowerFactory. The results show that the two control strategies can significantly enhance the damping of the shafting oscillation, which promotes shafting dynamic characteristics under MPPT （maximum power point tracking） operation mode and constant power control mode respectively.
标题：并网双馈感应风电系统轴系振荡抑制控制策略研究
title:Control Strategy for Suppressing Shafting Oscillation of Grid-Connected DFIG-Based Wind Power Generation System
作者：姚骏,骆悦,王雪微,刘超,李琰
authors:YAO Jun,LUO Yue,WANG Xuewei,LIU Chao,LI Yan
关键词：风力发电,双馈感应发电机（DFIG）,轴系振荡,电气阻尼,抑制控制策略,
keywords:wind power generation,doubly-fed induction generator（DFIG）,shafting oscillation,electrical damping,suppression control strategy,
发表日期：2017-10-28
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