摘要
电网故障情况下,光伏并网逆变器的控制器指令将发生突变,可能导致控制器进入非线性工作区域,从而使得光伏电源的故障电流暂态特征极为复杂。分别对控制器工作在线性区域和非线性区域2种情况下光伏电源的故障电流暂态特征及其影响因素进行了研究。在此基础上,指出了用稳态故障电流模型等效替代光伏电源以进行故障分析的处理方法的适用性。
Upon grid fault, controller’s reference signals of photovoltaic（PV） grid-connected inverter change abruptly, causing controller to operate in non-linear area. Consequently, the fault current transient features of PV power generator are very complicated. On condition that controller operates in both linear or non-linear areas, fault current transient features of PV power generator and their impact factors are studied in this paper. Based on it, applicability of treatment approach of equivalently replacing PV power generator with its steady-state fault current model for fault analysis is pointed out.
出处
《电网技术》
EI
CSCD
北大核心
2015年第9期2444-2449,共6页
Power System Technology
基金
江苏省自然科学基金资助项目(BK20140113)~~
关键词
光伏电源
故障电流
暂态特征
等效模型
故障分析
PV power generator
fault current
transient features
equivalent model
fault analysis
