Abstract:
Traditional central control system fails to cope with operation and control issues of distribution network integrated with high penetration level of distributed generations, due to its low reliability, high computation and communication burden and poor expansibility. Based on distributed cooperation principle, this paper presented a multiple objects distributed optimization control strategy for distribution network using DG grouping method. In considering the feature of high resistance/reactance ration of distribution network feeder line, the distributed control strategy for node voltage control group was developed by taking capacity utilization ratio of DG as the consensus variable. The distributed control strategy for exchanged active power and reactive power control, which respectively takes capacity utilization ratio and power factor as the consensus variable, was formulated according to the different conditions of exchanged power imbalance. The parameter tuning method for three kinds of distributed optimization control strategies were given. The correctness and effectiveness of the proposed method were verified by simulation examples in IEEE14 node system. The method provides a reference to achieve optimal operation of distribution network with high permeability distributed generation accessing.