基于新型直流电力弹簧的光伏系统

Photovoltaic System Based on Novel DC Electric Spring

针对光伏发电系统功率输出随机性强、波动性大问题,提出了一种基于新型直流电力弹簧(DCES)的独立光伏系统,以提高关键负载电能质量。首先建立DCES的拓扑结构及相应控制策略,然后对系统提出一种能量管理算法,且详细研究了DCES的建模及控制器参数设计,使得关键负载的电压能跟踪给定值。最后,基于MATLAB/Simulink仿真结果,验证所提出的DCES能抑制直流非关键负载的电压,从而稳定直流关键负载功率和电压。

Aiming at the problem of strong randomness and volatility of electric output in photovoltaic electric generation system and in order to improve the quality of critical load electric,an independent photovoltaic system based on novel DC electric spring(DCES)was proposed.Firstly,the topology of DCES and its corresponding control strategy were established.Then,an energy management algorithm was proposed for the system.The modeling of DCS and the design of controller parameters were studied in detail,so that the voltage of the critical load can track the given value.Finally,based on MATLAB/Simulink simulation results,it was verified that the proposed DCES could suppress the voltage of DC non-critical loads,thereby stabilizing the power and voltage of DC critical loads.