光伏发电并/离网切换控制策略研究*

万晓凤; 胡  伟; 余运俊; 辛建波

万晓凤,胡伟,余运俊,辛建波.光伏发电并/离网切换控制策略研究*[J].电测与仪表,2016,53(11):.
Wan Xiao-feng,Hu Wei,Yu Yun-jun,Xin Jian-bo.Research on switching control of grid-connected and off-grid for PV system[J].Electrical Measurement & Instrumentation,2016,53(11):.

光伏发电并/离网切换控制策略研究*

Research on switching control of grid-connected and off-grid for PV system

DOI：

中文关键词: 光伏逆变器平滑切换分相开关并网

英文关键词:photovoltaic inverter, smooth switch, split-phase switch, grid-connected

基金项目:国家国际科技合作专项(2014DFG72240),国家科技支撑计划(2013BAA01B01),江西省科技支撑计划(2013BBE50102),江西省科技落地计划(KJLD14006)

作者中文名	作者英文名	单位
万晓凤	Wan Xiao-feng	南昌大学信息工程学院
胡伟	Hu Wei	南昌大学信息工程学院
余运俊	Yu Yun-jun	南昌大学信息工程学院；江西省电力科学院
辛建波	Xin Jian-bo	江西省电力科学研究院

摘要点击次数: 2743

中文摘要:

对于具有并网及离网双模式运行功能的光伏发电系统,实现两种模式之间的平滑切换一直是控制上的难点。建立了三相光伏发电系统仿真模型,分析研究光伏逆变器的并网、离网两种模式切换控制策略。提出一种实现并/离网平滑切换的方法,采用分相并网开关,检测电网电压每相过零实施开关合断并合理配合控制策略的切换时序,离网时采取PI调节器重载初始值方式保持稳定电压输出。仿真结果表明,输出波形有效地得到改善,证明了该控制方案的可行性。

英文摘要:

It is difficult to control dual-mode smooth switch for grid-connected and off-grid photovoltaic power generation system. Establish simulation model of three phase photovoltaic power generation system, analysis and research switching control strategies of grid-connected and off-grid model for photovoltaic inverter. A method to realize smooth switch between grid-connected and off–grid was proposed. Three split-phase switches were used to operate switch by detecting zero grid voltage of each phase and coordinating transformation sequence of control strategy reasonably. PI controller was used to make load initial value to maintain voltage stability. Result of simulation display that inverter’s waveform were improved effectively and prove the feasibility of the control scheme.

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