Considering the active distribution network reactive voltage control method for regions with constraints on the number of switching actions

This study addresses the issue of reactive voltage control in regional active distribution networks, which currently does not consider the number of switch actions, resulting in high network operating costs and reduced equipment lifespan. This study focuses on developing a reactive voltage control method for regional active distribution networks that incorporates constraints on the number of switch actions. First, a mathematical model of the regional active distribution network is constructed, considering the action switches within the network. Subsequently, a reactive power voltage control model is established, aiming to maximize the utilization of distributed power supplies, minimize the voltage offset, and minimize the total number of switch actions. During the construction of the control model, various constraints, such as active power balance, node voltage, and the number of switch actions, are fully taken into account. The gray wolf optimization algorithm is employed to solve the constructed reactive voltage control model, and the results are subsequently output. Experimental results demonstrate that this method effectively reduces line loss and switching action costs in the active distribution network, enhances distributed energy utilization, and maintains voltage stability within the safe range of 0.97–1.02 p.u.