双馈风电机组孤岛机理与防孤岛保护试验  

Research of islanding mechanism and anti-islanding protection for DFIG

作　　者：李少林[1] 秦世耀[1] 王瑞明[1] 王文卓[1] 

机构地区：[1]中国电力科学研究院,北京100192

出　　处：《电力自动化设备》2016年第7期34-40,共7页Electric Power Automation Equipment

基　　金：国家科技支撑计划项目(2015BAA07B01);国家电网公司科技项目~~

摘　　要：通过风电机组孤岛运行特性分析,揭示了风电机组孤岛运行功率不匹配度与公共连接点(PCC)处电压与频率的关系,进行了功率扰动灵敏度定量分析;提出了无功功率-频率反馈和有功功率-电压反馈控制相结合的综合功率扰动孤岛检测法,并进行了双馈风电机组综合功率扰动孤岛检测控制环设计。所提方法具有无检测盲区、检测速度快、可靠性高等特点。通过MATLAB/Simulink仿真实现了双馈风电机组综合功率扰动孤岛检测全过程仿真;并利用RLC负荷模拟设备在2.5 MW大容量双馈风电机组上进行了防孤岛保护现场试验,结果证明了利用所提方法可有效检测风电机组孤岛运行。The operating characteristics of islanded wind turbine are analyzed,the relationship between its power mismatch degree and the voltage/frequency of PCC（Point of Common Coupling） is revealed,and the power disturbance sensitivity is quantificationally the reactive power-frequency feedback control and analyzed. A composite island detection method combining the active power-voltage feedback control is proposed and a control loop for the proposed detection method is designed for DFIG（Doubly Fed Induction Generator）, which is fast,reliable and without dead-zone. The whole detection process is simulated with MATLAB/ Simulink and the field test of anti-islanding protection is carried out for a 2.5 MW DFIG with RLC load simulation equipment. The simulative and experimental results show the islanding operation of wind turbine can be effectively detected bv the proposed method.

关 键 词：双馈风机 风电 功率匹配 灵敏度分析 综合功率扰动 防孤岛保护 

分 类 号：TM315[电气工程—电机]