极端工况下微网电压稳定控制策略研究

Voltage Stability Control Strategy of Microgrid under Extreme Conditions

为了抑制极端工况下的电压跌落,从超级电容与蓄电池相互配合的角度出发,通过精确控制超级电容电压的方式,在不增加电容值的同时提高系统的功率裕度,从而降低在极端工况下电压跌落。在PSCAD/EMTDC建立了基于超级电容和蓄电池储能的微电网模型,仿真结果表明,所提控制策略可以有效缓解微电网在重负载下的电压跌落,电压落幅度减小13.7%。

To suppress voltage sags under extreme conditions,from the perspective of the cooperation between the super capacitor and the battery,the power margin of the system is improved by precisely controlling the voltage of the super capacitor without increasing the capacitance in this paper,so as to reduce voltage sags under extreme conditions.A microgrid model based on ultracapacitors and battery energy storage is established in PSCAD/EMTDC.In PSCAD/EMTDC,a microgrid model based on super capacitor and battery is established.The simulation results show that the proposed control strategy can effectively alleviate the voltage sag of the microgrid under heavy load,and the voltage drop amplitude is reduced by 13.7%.