Intelligent Identification of Voltage Variation Events Based on IEEE Std 1159-2009 for SCADA of Distributed Energy System

Since the renewable energy is intermittent power source, feeding a lot of renewable energy into the grid would cause voltage variations affecting the stability of the power system. As a result, the effective detection and identification of voltage variation events become important tasks for the protection of microgrid integrated different distributed energy systems. In this paper, a rule-based technique based on IEEE Std 1159-2009 is proposed to deal with the estimation of voltage variations, and a prototype of a supervisory control and data acquisition system with filter bank and adaptive filtering is developed. With the help of the implemented technique, the monitoring of voltage variation events can be efficiently performed and practically applied in the microgrid system of the Taiwan Institute of Nuclear Energy Research.