Optimal Control of Distribution Voltage with Coordination of Distribution Installations

In recent years, distributed generation, as clean natural energy generation and cogeneration system of high thermal efficiency, has increased due to the problems of global warming and exhaustion of fossil fuels. Many of the distributed generations are set up in the vicinity of the customer, and there is the advantage that this decreases transmission losses. However, output of natural energy power generation of wind power, photovoltaics, etc. which is distributed generation, is influenced by meteorological conditions. Therefore when the distributed generation increases, by the conventional control technique, it is expected that voltage change of each node becomes a problem. In this paper, we propose the optimal control of distribution voltage with coordination of distributed installations, such as LRT, SVR, SC, ShR, and SVC. In this research, SVR is assumed to be a model with tap changing where the signal is received from a central control unit. Moreover, the communication infrastructure in the supply of distribution system is assumed to be widespread. GA is used to decide the operation of this control. In order to confirm the validity of the proposed method, simulations are carried out for a distribution network model with a distributed generation (photovoltaic generation).