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In a future distribution network, it is difficult to maintain voltage because a large number of distributed generators are introduced to the system. The authors have proposed an autonomous decentralized voltage control method using power factor control of distributed generators and multi-agent technology. However, the control method does not include the function which saves the reactive power output of distributed generators. In this paper, we propose a new control method which can save the excessive reactive power output. The method is formulated as a differential-difference type equations considering the time-delay with communications between the agents. The proposed method is tested in 4-node and 24-node model. The relationship between control performance and time-delay is discussed.
Date of Conference: 5-8 Nov. 2007