Enhancement of voltage profile for unbalanced distribution system with wind energy and superconducting magnetic energy storage

摘要

This paper presents the impact of wind energy generation system (WEGS) and superconducting magnetic energy storage (SMES) in enhancing the voltage profile for three phase unbalanced radial distribution system for 24 hours. Fixed-speed squirrel-cage induction generator (SCIG) type with a fixed capacitor connected at stator terminal to enhance the power factor is used in this work as WEGS. SMES DC-DC chopper is controlled with fuzzy logic controller (FLC) to manage the power transmitted between SMES and the grid side. FLC is analyzed for SMES able to stored/release real power from/to the distribution power system. SMES system and WEGS installed in the distribution system at worst voltage bus. In this paper enhancement of the voltage profile for radial unbalanced IEEE 34-node feeder was performed. The power-flow calculations were performed using C++ programming. A practical electricity demand in France daily load curve used to change the loading demand of 34 bus systems. By using SMES system with WEGS at the same bus in the distribution system, voltage profile of the system in all modes of operation can be improved.