Research on the Two-stage Multi-objective Optimal Configuration Method of Reactive Power Compensation Devices in Power Grid Based on Power Loss Index

In view of the fact that the current distribution network reactive power configuration optimization problem has poor solution efficiency and is easily trapped into local optimum, a study on the multi-objective optimal configuration of two-stage reactive power compensation considering power loss indices is carried out. A multi-objective optimal configuration model for two-stage reactive power compensation devices in power grids based on the power loss index is developed with the objective functions of minimizing loss cost, purchase cost, installation cost, and operation cost, and introducing penalty functions to solve the optimal installation location and capacity of reactive power compensation devices in power grids under constrained conditions using the remora optimization algorithm. The proposed method is validated by simulations carried out on IEEE-34 and PG-69 systems. The simulation results show that by considering the power loss index, it can effectively further reduce the network losses, improve the node voltage distribution level, and reduce the equipment cost and expense, while shortening the solution time of the optimization problem. In addition, the remora optimization algorithm used has a stronger global optimal solution search capability, which can better adapt to changes in the distribution network load level and the access of distributed power sources.