Online Shunt Capacitors Switching Algorithm in Smart Distribution System

It is the Distribution System Operators’ (DSO) responsibility to maintain the customer voltage within specified rangeswhich is an important issue inelectrical distribution system.Capacitor banks have long been used to provide voltage support and to correct displacement power factor on distributionnetwork. In this paper, a new approach for online voltage control of distribution networks that improved the conventional voltage control models is presented. In the proposed model, it is assumed that renewable distributed generations are integrated in the distribution system, andthe communication infrastructure of smart grid has been implemented. Also, all thecapacitors are fitted with Remote Terminal Unit (RTU)and are completely accessible and controllable. Unlike the other voltage control methods, the proposed approach does not need the load and renewablegeneration forecast data to regulate voltage. Moreover, the calculation time of proposed approach is less than other methods. To verify the effectiveness and robustness of the proposed control scheme, the proposed voltage control scheme is tested on a typical distribution network.The simulation results show that the proposed real time voltage control has the capability to maintain distribution voltage in specified ranges.

Keywords:

distribution system , renewable distributed generation , switched capacitor , smart grid , voltage Control