Multi-Agent System based Voltage Regulation in a Low-Voltage Distribution Network

Due to the high feed of regenerative power in many low-voltage distribution networks, it is possible that in some nodes inadmissible voltages appear. This paper presents a way to comply with the prescribed voltage band. It is realized by a multi-agent system, which executes a three-stage algorithm to adjust the voltage at the nodes of the grid. A possible configuration is presented with a voltage regulated distribution transformer. It regulates the secondary voltage in several steps. The multi-agent system measures the voltages in different points in a network. The three-step algorithm controls the voltage, reactive and real power to comply with the prescribed voltage band. The paper shows a flexible communication structure, which is used by the agents to exchange data. An example network is presented. This displays the effectiveness of the communication cycle. Furthermore, the influence of the three-step algorithm is shown in a test system.