分布式电源孤岛效应检测方法研究

孤岛效应(Islanding)是指分布式能源并网发电系统中,市电因人为切断或出现故障而停止向负载供电时,分布式能源系统继续并网工作,从而使电网局部负载仍处于供电状态的现象。孤岛效应形成了电力公司无法掌控的自给供电孤岛,可能会导致并网逆变系统和用电设备的损坏,还会对电力检修人员造成危险,因此准确、及时的检测出孤岛效应是光伏电源设计中的一个关键性问题。

Island effect （Islanding） refers to the distributed energy and power generation systems, electricity due to human failure to stop or cut power to the load, distributed energy system to continue and work network, so that the load is still in the local power grid state phenomenon. Island effect formed a power company can not control the island self-sufficient power supply may cause damage to the inverter grid systems and electrical equipment, electrical maintenance will result in danger to personnel, so accurate and timely detection of islanding of photovohaic power supply design one of the key issues.