基于三相光伏微源的串联校正器参数设计方法

现有串联校正器的参数设计仍然采用工程试凑法,为此,提出了基于三相光伏微源的串联校正器参数设计方法。首先,针对微网中的三相光伏微源通常所采用的PQ控制,推导了更适合设计串联校正器参数的电流环数学模型。在此基础上,针对电流环这一恒值控制系统,基于线性系统控制理论提出了三种串联校正器的参数设计方案。最后,在MATLAB环境下采用算例验证并且比较得出具有最佳控制性能的方案;为了验证上述理论分析结果,在PSCAD/EMTDC环境下搭建了采用主从控制的微网平台,在不同的情况下,验证了理论分析所得的最佳方案,在实际模型中不仅使PQ控制的控制性能最佳,而且对v/f控制效果影响最小。

The design method of series compensator for three-phase photovoltaic micro source

The parameters of series compensator is designed by engineer trial-and-error method,so a design method of series compensator based on three-phase photovoltaic microsources is developed in this paper. Fistly,a mathematical model of current loop which is more suitable for designing the series compensator is developed for the PQ con-trol.On this basis,as for the constant value control system of current loop,it proposes three schemes about designing the parameters of the series compensator according to the control theories of linear control system.Finally,the scheme which has the best control performance in the example is developed by comparing .Then a simulation model of microgrid using master-slave control stategy is built in PSCAD/EMTDC,The simulation results show that the best sheme which obtain from therotical anlysis not only makes the PQ control peformance well but also has less effect on v/f control.