摘要
以三相光伏并网逆变器的孤岛检测技术为研究对象,分析当无功功率不匹配时,公共耦合点(PCC)电压频率随逆变器输出无功功率的变化关系。针对现有基于无功功率扰动的孤岛检测方法存在不可检测区域(NDZ),功率损耗大的问题,提出一种基于无功功率控制策略的孤岛检测算法。该算法通过周期性地对光伏逆变器无功参考进行扰动,使孤岛效应发生后频率发生快速偏移直至越限。根据IEEE Std.929-2000规定,通过对该文所提算法进行仿真和实验研究,验证其有效性。
In this paper,the islanding detection technology of three-phase photovoltaic grid-connected inverter is taken as the research object. When the reactive power does not match,the frequency of the point of common coupling(PCC)will change with the inverter output reactive power. A new islanding detection algorithm based on reactive power control strategy is proposed to solve the problem that the Non-Detection Zone(NDZ)and the power loss are large for the existing island detection method based on reactive power perturbation. The algorithm is used to periodically disturb the reactive power reference of the PV inverter so that the frequency deviates outside the frequency thresholds quickly after islanding.According to IEEE Std.929-2000,the simulation and experiment results show that the proposed algorithm is correct and effective.
作者
周林
谢星宇
郝高锋
解宝
郑堃
Zhou Lin;Xie Xingyu;Hao Gaofeng;Xie Bao;Zheng Kun(State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing University,Chongqing 400044,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2020年第2期275-283,共9页
Acta Energiae Solaris Sinica
基金
国家自然科学基金面上项目(51477021)。
关键词
光伏发电
自适应
孤岛检测
无功功率扰动
检测盲区
solar power generation
adaptive
islanding detection
reactive power disturbance
non-detection zone
