摘要
以单极式光伏逆变器并网系统为研究对象,将阻抗的概念进行扩展,提出一种基于公共耦合点(PCC)综合阻抗的被动孤岛检测方法,利用快速傅里叶变换提取出电压、电流的实时信号,通过识别PCC处综合阻抗的变化状态,来区分正常、孤岛现象。仿真结果表明:所提孤岛检测方法能快速、有效地检测出孤岛,且不会影响逆变器输出电能质量。
The grid-connected system of single-pole photovoltaic inverter is taken as the research object,the concept of impedance is expanded,and a passive islanding detection method based on the common coupling point(PCC)comprehensive impedance is proposed. The real-time signals of voltage and current are extracted by fast Fourier transform. By identifying the change state of the comprehensive impedance at the PCC point,the phenomenon of normal and isolated island is distinguished. The simulation results show that the isolated island detection method can quickly and effectively detect the isolated island,and does not affect the output power quality of the inverter.
作者
高淑萍
汪凯昌
贠保记
宋国兵
罗娟
Gao Shuping;Wang Kaichang;Yun Baoji;Song Guobing;Lou Juan(College of Electrical and Control Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Xi’an Xirui Engineering Technology Limited Company,Xi’an 710018,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2019年第2期556-562,共7页
Acta Energiae Solaris Sinica
基金
陕西省自然科学基础研究计划-面上项目(2017JM5138)
关键词
光伏发电
孤岛检测
综合阻抗
故障分量
photovoltaic generation
islanding detection
integrated impedance
fault component
