双馈风机低电压穿越控制策略的分析与研究  

Analysis of DFIG-based wind generation LVRT control strategy

作　　者：张建华[1] 王健[1] 陈星莺[2] 莫岳平[1] 辛付龙[1] 

机构地区：[1]扬州大学能源与动力工程学院,江苏扬州225127 [2]水资源高效利用与工程安全国家工程研究中心(河海大学),江苏南京210098

出　　处：《电力系统保护与控制》2011年第21期28-33,共6页Power System Protection and Control

基　　金：十一五国家科技支撑计划项目(2006BAA01A24);江苏省高校自然科学基础研究项目(08KJD480001)

摘　　要：在电网电压跌落处于一定范围内,风力机不但要保护转子侧变换器,还要向电网提供无功支撑,以利于电网的恢复。以双馈电机为例,以保护转子侧变换器为目的,着重分析了电网电压跌落时刻,不同电压相角所激起的双馈电机电磁过渡过程,从而提出一种消除过渡过程中谐波分量的控制策略。仿真结果表明在电网电压跌落时,在所提出的控制策略下,既能达到对转子侧变换器保护的目的,同时消除了电压跌落时定转子侧的谐波电流,也能实现对电网提供无功支撑,使得电网继续并网运行。In order to facilitate the recovery of power, when the grid voltage drops in a certain range, the wind generator not only needs to protect the rotor side converter, but also should provide reactive power to the grid. This paper takes DFIG for an example. In order to protect the rotor side converter, it analyzes DFIG＇s electromagnetic transition process aroused by different voltage phase angle while the grid voltage drops. A control strategy to eliminate harmonic components during transition process is proposed. Simulation results show that the control strategy can not only achieve the purpose of protecting the rotor side converter, while eliminating the harmonic currents of stator side and rotor side when voltage drops, but also provide reactive power to the power grid.

关 键 词：风力发电 双馈电机 数学模型 低电压穿越 动态响应分析 

分 类 号：TM614[电气工程—电力系统及自动化]