摘要
孤岛保护是并网逆变器的必备功能,快速孤岛检测是孤岛保护的关键。根据三相系统含有负序分量的特点,采用有源负序扰动法进行三相并网逆变器的孤岛检测。孤岛发生后,有源扰动导致电压负序分量发生明显变化,因此可以通过提取负序分量幅值判断孤岛的发生。根据IEEE Std.929-2000标准规定的测试电路对有源负序扰动法进行仿真分析。仿真结果验证了提出方案的有效性。
Islanding protection is an indispensable function of the grid-connected inverters, where the fast islanding detection is a key issue. Based on features of negative sequence components in the three-phase system, an islanding detection method based on the active negative sequence component disturbance （ANSCD） is proposed. It can lead to the significant variations of the voltage negative sequence component after islanding. Therefore, islanding is confirmed judging by the negative sequence component amplitude. Simulations are performed according to IEEE Std.929-2000, and results verify the effectives of the ANSCD.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2009年第12期44-47,共4页
Power System Protection and Control
基金
国家自然科学基金重点项目(50837003)
河北省自然科学基金资助项目(E2008000801)~~
关键词
三相并网逆变器
孤岛检测
有源负序扰动
负序分量提取
three-phase grid-connected inverters
islanding detection
active negative sequence component disturbance
negative sequence component extraction
