Reactive Power Planning in Distribution Network Considering the Consumption Capacity of Distributed Generation

The increase in distributed generation (DG) penetration is creating a wide range of technical problems in distribution networks. Reactive power optimization aims to minimize the fluctuation of voltage and power flow in distribution networks, which owe to the connection of distributed generation. However, the precondition is to sacrifice part of the consumption capacity of DG. Through reactive power planning of the distribution network, the location and capacity of reactive power compensators can be determined concretely, which can improve the consumption capacity of DG on the one hand, and flat the insecurity fluctuation on the other hand. This paper establishes a multi-objective function model considering minimum voltage deviation, minimum active power losses, and maximum optimization capacity of DG. The connect location and capacity of reactive power compensators are considered in the constraint. The optimization problem is solved by converting the multi-objective model into a single objective model. The IEEE33 node distribution network is used for case studies. From the three simulation scenario results, the improvement of DG output active power after reactive power optimization demonstrates the effectiveness of the proposed model.