交直流混合配电网多阶段动态电压恢复控制研究

Research on multi-stage dynamic voltage restoration control of AC-DC hybrid distribution network

若仅从整流侧或逆变侧直接干扰电压变化,电压易出现控制超调、控制失稳,因此设计一种交直流混合配电网多阶段动态电压恢复控制方法。建立交直流混合配电网的负荷恢复模型,根据其供电输出过程电压变化的特点,设定目标函数与约束函数,根据时间维度和空间维度设计交直流混合配电网多阶段控制架构,设计多阶段、不同区域的动态电压控制过程,完成交直流混合配电网多阶段动态电压恢复控制的研究。通过仿真算例的实验结果证明,配电网中重要节点的电压超量极限值与电压稳定裕度均较小,可平稳控制电压。

If only the rectifier side or the inverter side directly interferes with the voltage change,the voltage is prone to control overshoot and voltage control instability.Therefore,a multi-stage dynamic voltage recovery control method for AC/DC hybrid distribution network was designed.The load recovery model of the AC/DC hybrid distribution network was established,and the objective function and the constraint function were set according to the characteristics of the voltage change during the power supply output process.According to the time dimension and space dimension,design the multi-stage control architecture of the AC/DC hybrid distribution network,the multi-stage and different area dynamic voltage control process was designed,and the research on the multi-stage dynamic voltage restoration control of the AC/DC hybrid distribution network was completed.The experimental results of a simulation example proved that the voltage excess limit value and voltage stability margin of important nodes in the distribution network are small,and the voltage can be controlled smoothly.