Voltage Sensitivity-Related Hybrid Coordinated Power Control for Voltage Regulation in ADNs

Voltage is a key operation index for active distribution networks. Coordinated power compensation of distributed energy resources (DERs) has shown promising results in alleviating voltage violation. Most methods use global optimization to obtain the optimal use of network-wide available resources, which becomes unfair when solving the same voltage issue of regional buses. Refined coordination of DERs on regional buses has not been formed as well. Therefore, this paper proposes a voltage sensitivity-related hybrid coordination algorithm. In order to fully tap into surplus reactive power of DESs, Volt/VAr control is considered in a higher priority than Volt/Watt control. For the selected crucial bus, a hybrid coordinated power compensation of regional DERs is designed in descending order of sensitivity or in proportion to available capacity under the same sensitivity value, which prioritizes using local and adjacent DERs to improve regulation effect and reduce changes in power flow. Due to the fact that voltage information is updated through association, the crucial bus needs to be reselected based on voltage assessment as a result, and the algorithm process will continue until the updated bus voltages become acceptable. Finally, the case study results in MATLAB indicate the effectiveness.