【摘要】 微电网是分布式电源接入电网的一种有效手段,电压和频率的控制对电网的稳定有着关键的作用。为了提高微电网的频率和电压的稳定性,更好地对微电网进行调压和调频,加强分布式电源的广泛应用,总结了微电网中分布式电源逆变器的3种外环控制方法:下垂控制、恒功率控制和恒压恒频控制,分析了这3种方法的主要原理,介绍了每种方法的用途。并通过PSCAD仿真平台验证了这3种方法的有效性和可行性,最后指出了3种控制方法的不足并对发展前景进行了展望。更多还原

【Abstract】 As an effective measure of accommodating distributed generations,micro-grid has attracted more and more attention recently.The control of voltage and frequency plays a key role in keeping the grid stable.In order to increase the frequency and voltage stability of the micro-grid,adjust its voltage and frequency better and broaden the application of distributed generation systems,the paper summarizes three outer-loop control methods for the distributed generation inverters in the micro-grid,including droop control,constant voltage/frequency control and constant power control,analyzes the main principles of these three control methods,and introduces the application of each method.PSCAD simulation shows that these control methods are feasible and effective.Finally,the deficiency in these three control methods and theirs development prospects are discussed.更多还原