Implementation of a multi-agent based voltage control method for a distribution system

This paper proposes a voltage control method based on a multi-agent system (MAS) for a distribution system to reflect the intentions of owners of distributed generators (DGs) with regard to voltage regulation. The proposed voltage control system consists of three types of agents: monitoring agents, DG agents, and a moderator. If a voltage violation is detected by a monitoring agent, DG agents send bidding data which represent the intentions of their owner to the moderator. The moderator determines the reactive power references of the DGs based on the voltage sensitivity and the bidding data. In order to interpret the complex relationship between the input and output and to reduce the calculation burden, a fuzzy inference system (FIS) is used for determining the reactive power reference. In addition, this paper proposes a method to compensate for voltage sensitivity. The proposed voltage scheme is validated by a pilot system.