CAJ | 학술논문

通过理论分析、故障仿真和试验等方法，系统研究了光伏逆变器的故障特性。阐述光伏逆变器的拓扑结构和双环控制原理，建立光伏发电系统的仿真模型。仿真不同短路故障时光伏逆变器的输出特征，分析影响光伏逆变器输出特征的主要因素，给出了某光伏逆变器的试验数据。研究表明，与传统同步电机电源相比，光伏电源馈出的短路电流在其基本组成、衰减速率以及幅值特征等方面均存在较大差异，将对微网保护性能带来直接影响。
통과이론분석、고장방진화시험등방법，계통연구료광복역변기적고장특성。천술광복역변기적탁복결구화쌍배공제원리，건립광복발전계통적방진모형。방진불동단로고장시광복역변기적수출특정，분석영향광복역변기수출특정적주요인소，급출료모광복역변기적시험수거。연구표명，여전통동보전궤전원상비，광복전원궤출적단로전류재기기본조성、쇠감속솔이급폭치특정등방면균존재교대차이，장대미망보호성능대래직접영향。
Through theoretical analysis, simulation and experiments, the fault characteristics of PV inverter generator are mainly researched. The PV inverter topologies and double-loop control principle are described, a simulation model of PV inverter generator is established, the output characteristics after the different short circuit fault are simulated, the main factors are analyzed, and the test data of a PV inverter is given. Compared with the traditional synchronous generator, short circuit current of distributed generator is quite different in basic composition, decay, amplitude characteristics, etc. This work is supported by National Natural Science Foundation of China (No. 51177058 and No. 5127708).