New Dynamic Voltage and Reactive Power Control Method for Distribution Networks with DG Integration

With the penetration of DGs in distribution networks, the conventional voltage and reactive power controls are facing the challenges of not only providing a stable, flexible, and economic voltage regulating scheme, but also mitigating the negative effects from DG penetration, such as voltage hikes and reverse power flows. This paper presents a new state-based dynamic control method for coordinating the existing voltage regulating facilities and DG units in distribution networks. The control method also takes into account different DG control models, including dispatch able DG and un-dispatch able DG. Simulation and test results from an 18-node distribution system show comprehensive comparisons regarding the DG control models, the DG capacities, and the DG locations. This work emphasized that the proposed method is capable of identifying the most economic voltage regulation scheme in distribution network with different configurations.