基于无功功率控制的光伏系统孤岛检测法  

Islanding Detection Method for PV System Based on Reactive Power Control

作　　者：张东峰[1] 惠晶[1] 王探靖[1] 

机构地区：[1]江南大学无锡市工业装备节能与控制重点实验室,江苏无锡214122

出　　处：《电力电子技术》2013年第7期43-45,共3页Power Electronics

基　　金：中央高校基本科研业务费专项(JUSRP11022);无锡市工业装备节能与控制重点实验室(CMES0915)~~

摘　　要：孤岛检测是分布式发电并网研究的难点,特别是在逆变器输出与负载功率平衡时难以检测出孤岛。频率或相位偏移等主动检测方法向电网注入谐波,而且在逆变器输出与负载相位匹配时孤岛检测失效。对此提出一种基于无功功率控制的孤岛检测法。与传统方法相比,该方法输出波形中谐波含量小,而且在并网运行时不会因扰动而降低发电量,仿真和实验结果表明逆变器能及时地检测出孤岛并关闭并网发电系统。It is difficult to detect islanding in distributed generation research, especially when power balance between the output of inverter and the load.Frequency or phase shift methods which inject harmonic into grid is ineffective when phase match between the output of inverter and the load.An active reactive power drift scheme is presented.The proposed method has few harmonic components compared to the conventional methods, and the effect of the power quality on the grid is minimised by the infinitesimal change in the reactive power components.Simulation and experimental results show that inverter requires a very short time to detect the islanding and to stop the PV system.

关 键 词：并网逆变器 孤岛检测 无功功率控制 

分 类 号：TM464[电气工程—电器]