Power Quality Management of Multi-port Energy Router Based on Multi-winding Line Frequency Transformer

Abstract

Energy internet increases the utilization of renewable energy resources and alleviates the energy crisis. The energy router, serving as the interface between the distributed network and renewable energy resources, plays a vital role in the energy internet. This paper proposes a multiport energy router based on multi-winding line frequency transformers, inheriting the advantages of high efficiency and reliability of traditional line frequency transformers and high controllability of power electronic devices. To deal with various power quality problems, a power quality management port is designed to improve the power quality of the distribution network comprehensively. The effectiveness of power quality management is verified by simulation on Matlab/Simulink. The simulation results illustrate that the proposed strategy can effectively deal with various power quality problems, including voltage and current harmonics suppression, voltage sags, reactive power, and three-phase unbalance compensation.