摘要
文章从理论上分析了无互连线逆变器并联系统中等效输出阻抗Z∠θ不一致时的功率分布情况。分析表明,Z∠θ呈感性时, Z∠θ不一致会引起无功功率偏差;而Z∠θ呈阻性时,Z∠θ不一致会导致有功功率偏差。在此基础上提出了下垂系数调整法以减小功率偏差。仿真和实验结果都表明提出的方法可明显提高各逆变模块的功率均分精度。
In the parallel inverters without control interconncction, the power distribution is analysed when the equivalent output impendance Z∠θ is different between paralleled invertcrs. Theory analyse indicates that when Z∠θ is inductive, the unbalance of Z∠θ leads to reactive power＇s difference;while Z∠θ is resistive,active power Can not be shared because of the unbalance of Z∠θ. Based on this analyse, the method called ＂droop coefficient regulation＂ is presented in order to reduce power error. Simulation and experiment prove that the way can improve power sharing precision markedly.
出处
《电源世界》
2007年第5期37-40,共4页
The World of Power Supply
关键词
逆变器
并联
无功功率
有功功率
inverter parallel reactive power active power
