A Study of Autonomous Decentralized Voltage Profile Control Method considering Power Loss Reduction in Distribution Network

Abstract

It is of prime importance to introduce distributed generators which can utilize renewable energy in order to improve the energy and environmental issue. When a distribution network has a large amount of distributed generators, voltage profile management becomes one of serious problems. To solve this problem, the authors have proposed “voltage profile control method” using power factor control of distributed generators in the previous works. Especially, the reactive power control of system connection inverter is utilized for voltage control in the method. On the other hand, the reduction of distribution power loss is also important issue because the resistance of distribution line is larger than that is utilized in the upper system. It is expected the distribution power loss is reduced by the flexible control of reactive power based on the reserve capacity of inverter. Hence, we improved the voltage profile control method in order to reduce distribution power loss. The proposed method is tested in 24-node model system and its effectiveness is shown.