微电网孤网运行特性研究

Research on Operation Characteristics of Isolated Micro-grid

微电网孤网模式下主控微源对电压和频率的控制能力对于微电网的稳定至关重要。基于DIgSILENT软件平台对微电网孤网运行模式下负荷的扰动、储能电池不同的额定功率对微电网电压/频率特性的影响进行研究。仿真结果表明,储能电池额定输出功率越大对电压和频率的调节作用越强,调节时间越短;负荷波动越大对电压影响越大,微电网越不稳定,在运行中应避免负荷的剧烈变化。

When the Micro-grid operate in the isolated mode, the ability of the master micro-source to control voltage and frequency is critical to keeping the stability of the Micro-grid. Based on the DIgSILENT software platform,The effect of load disturbance and the different rated power of the energy storage battery on the voltage and frequency characteristics of the Micro-grid was studied. The simulation results showed that the rated output power of the storage battery had positive effect on the regulation of voltage and frequency and negative influence on the adjustment time. When the load fluctuation was greater, the Micro-grid was more unstable. The power drastic changes during operation should be avoided.