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Optimal Control of Reactive Power and Voltage in Active Distribution Network Based on Source-Grid-Load Interaction

The large-scale access of distributed generation to the grid has brought about a huge change of the structure and operation mode in distribution network. In this situation, the power flow changes from unidirectional to bidirectional, and the traditional reactive power and voltage optimization control methods will be limited. In addition to the traditional grid-side regulating equipment, the distributed generation and load side also have control capabilities in active distribution network. Therefore, in order to make full use of the resources in the power grid, this paper proposes a method for optimal control of reactive power and voltage in active distribution network based on source-grid-load interaction. Firstly, the concept of source-grid-load interaction and its feasibility in optimal control of reactive power and voltage are introduced. Then power loss and voltage offset are taken as objective functions to establish a reactive power and voltage optimization control model. Finally, the multi-objective particle swarm optimization algorithm is applied to solve the model. A simulation verifies the correctness of the proposed method.