含光伏发电的微电网电压稳定性控制研究

Study on Voltage Stability Control of Microgrid With Photovoltaic Generation

光伏(PV)发电作为微电网(MG)的主要分布式电源,其功率输出在很大程度上受制于光照强度等外界环境因素,尤其是在多云的天气情况下,PV发电的功率输出波动将影响MG电压稳定性。在此通过分析PV的功率-电压特性及其对MG电压稳定性的影响,提出了能够有效抑制PV功率波动,提高MG电压质量的控制策略,在Matlab/Simulink环境下进行了仿真分析,并且证明了所提出的控制策略的有效性。

Photovoltaic （PV） generation is dominant distributed generation in microgrid （MG）, its output depends on light intensity largely.An obvious change of light intensity especially in the cloudy condition, leads on output power fluctuating and voltage deviation.The power and voltage characteristics of PV generation and the impact of PV genera- tion operation on the voltage stability of MG are analyzed.A strategy which overcomes the voltage deviation is pre- sented.Simulation results based on the Matlab/Simulink show that the proposed method is effective.