摘要
提出一种利用无功补偿技术进行并网发电系统孤岛检测的方法,通过对负载电压频率的判断即可有效检测是否进入孤岛状态。根据负载特性的不同,合适的无功补偿方式可以获得最佳的检测效果。文章给出了无功补偿在孤岛检测中应用的理论依据,并结合仿真分析研究了供电电源与本地负载之间的有功和无功功率匹配程度对负载电压频率特性的影响。
A new method for islanding detection is presented, and the status of the islanding can be detected by the change of the frequency of the load voltage. The optimal detection performance is achieved when the appropriate RPC (reactive power compensation) strategy is used, which is in accord with the characteristics of the loads. The theory of the islanding detection using the variable reactive power generation from the inverter is investigated primarily. The simulation results validate the feasibility of the RPC method to detect the islanding. At last, the effects of the matching degree of the active power and reactive power between the power resource and the local loads on the frequency of the load voltage are analyzed by the simulation results.
出处
《电工电能新技术》
CSCD
北大核心
2005年第3期22-26,共5页
Advanced Technology of Electrical Engineering and Energy
关键词
孤岛
并网
无功补偿
功率匹配
islanding
grid-connected
reactive power compensation
power matching
