Research on Voltage Control of Active Distribution Network with Micro Grid Based on Multi-Agent Technology

Abstract

 In fact, due to the relative backwardness of distribution network management and the complexity of network structure, not all nodes are equipped with load real-time measuring equipment, and because of the huge number of distribution network nodes, it is not advisable to carry out accurate power flow calculation to obtain the voltage distribution of the whole distribution network from both economic and technical aspects. In this paper, a double-layer cooperative MAS(multi-agent systems) control framework is established, and intelligent agents are set in feeder layer and node area layer respectively. Functions that need quick response and can be judged and decided only based on local information are independently performed by the lower-level regional agents. Using the information of voltage perception, the reactive output of distributed power supply can be regulated by voltage estimation algorithm, so that distributed power supply can participate in voltage regulation, and multi-agent technology can be used to make the reactive power of distributed power supply cooperate with on-load transformer to realize comprehensive voltage control of active distribution network. The reactive power generated by various DG(distributed generations) in microgrid is brought into the optimized control variables, and combined with the traditional control strategy, various reactive power sources at microgrid level are coordinated to control the voltage of each contact point.