Abstract

Distributed generation and micro-grid system is increasingly concerned for its superior performance. Monitoring system is an important part of it. This paper analyzes the requirements of the monitoring system which is commonly used in micro-grid system. Then a new monitoring system scheme based on communication of equipments is proposed in this paper. The program uses the serial port to communicate with each device of the micro-grid system. Based on the monitoring system, real-time collection of operational data, condition monitoring of switches and control the remote device can be achieved. The monitoring system has some advantages, such like superior scalability, stability, and so on. Some communication methods of equipments which are commonly used in distributed generation and micro-grid system are given in this paper, such as the SMA grid inverter, Power One grid inverter and Rijia grid inverter etc. Finally, this paper takes the photovoltaic micro-grid experimental system of Tianjin University for an example, a monitoring system is designed for this micro-grid. The successful application of the monitoring system proved its stability and excellent scalability.

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