基于功率平衡的微电网稳定性控制策略

针对含有储能元件的分布式发电系统存在直流母线电压难以准确控制,直流子网切负荷瞬间交流子网电压及频率会偏离正常值的缺点,提出了基于功率平衡带负载前馈的蓄电池控制策略和改进的V/f逆变控制方法对其进行改进。仿真结果表明:交直流混合微电网在孤岛模式下和受扰动时,该方法均能使直流母线电压实现稳定且电压和频率都能够满足正常运行的要求,同时提高了整个系统的抗扰动能力。

Micro power grid stability control strategy based on power balance

Distributed generation system for contain energy storage element is difficult to accurately control DC bus voltage and DC subnet cutting load voltage and frequency instant communication subnet will deviate from normal faults, storage battery control strategy based on power balance with load feed forward is proposed and improved V/f inverter control methods for improvement.The simulation results show that AC/DC hybrid micro power grid operates in an island mode and the disturbance, this method can make the DC bus voltage stability, and voltage and frequency to be able to meet the requirements of normal operation, at the same time it improve the ability to resist disturbance of the whole system.