考虑有功协调优化的配电网动态电压控制

Dynamic voltage control of distribution network considering coordinated optimization of active power

配电网电压动态变化特征日益凸显,对配电网动态优化控制提出了新的要求。除此之外,配电网有功与无功的耦合特性也使得仅基于无功/电压的控制方法效果降低。因此,提出了一种考虑有功/无功快速协调优化的配电网动态电压控制方法,实现在秒级时间尺度内关键节点的电压恢复。首先建立配电网有功/无功控制设备动态模型,并基于模型预测控制理论建立了动态电压控制系统预测模型。设计了面向配电网电压协调控制的多目标自适应优化策略,基于配电网同步相量测量单元动态测量数据实现有功/无功控制设备出力的动态协调。仿真结果表明,该方法能够实现配电网电压波动的秒级抑制,并将目标节点电压快速无差地恢复至扰动前水平。

The dynamic characteristics of distribution network voltage are becoming more and more prominent,which puts forward new requirements for dynamic optimal control of distribution network. In addition,the coupling characteristics of active and reactive power in the distribution network also make the control method only based on reactive power/voltage less effective. Therefore,a dynamic voltage control method for distribution network based on fast coordinated optimization of active and reactive power is proposed to achieve voltage recovery at key nodes within second-level time scale. Firstly,the dynamic models of the active and reactive power control equipment of the distribution network are established,and the prediction model of the dynamic voltage control system is established based on the model prediction control theory.A multi-objective adaptive optimization strategy for distribution network voltage coordination control is designed to achieve dynamic coordination of active and reactive power control equipment output based on dynamic measurement from the phasor measurement unit(PMU) of the distribution network. Simulative results show that the method can achieve second-level suppression of voltage fluctuation in the distribution network and restore the target node voltage to the pre-disturbance level quickly and without error.