P-Q Coordinated Planning Method for Distributed Generation in Distribution Network

Voltage problem brings challenges to the operation of the distribution network. This paper proposed a multi-objective coordinated active and reactive power (P-Q) optimization method for distributed generation (DG) planning with high penetration in distribution network to handle the voltage problem. Through this method, less network power loss and voltage deviation can be obtained by reducing the active output slightly and regulating the reactive output in DG locating and sizing. Meanwhile, the voltage quality of the system can be improved, thus the voltage problem can be solved in the perspective of network planning. To efficiently address this problem, a mixed-integer non-linear programming (MINLP) based multi-objective optimization approach of DG planning is proposed, which is validated via two typical distribution systems.