Operation of SMES for the Current Source Inverter Fed Distributed Power System Under Islanding Mode

• Published in: IEEE transactions on applied superconductivity Vol. 23; no. 3; p. 5700404
• Main Authors: Wang, Zheng, Jiang, Li, Zou, Zhixiang, Cheng, Ming
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.2013; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Computer simulation; Convertors; Current source inverter; Current sources; Direct energy conversion and energy accumulation; distributed power system (DPS); Disturbances. Regulation. Protection; Electric potential; Electric power distribution; Electric power systems; Electric utilities; Electrical engineering. Electrical power engineering; Electrical machines; Electrical power engineering; Energy accumulation; Exact sciences and technology; Impedance; Inductance; Inverter fed; Inverters; islanding; Miscellaneous; Power generation; Power networks and lines; Power system stability; Reactive power; renewable energy; Small & medium sized enterprises-SME; superconducting magnetic energy storage (SMES); Superconductivity; Voltage; Voltage control; Performance evaluation; Closed loop; Output power; Current source converter; Computer simulation; Grid-connected system; distributed power system (DPS); Distributed system; Actuation voltage; Voltage control; Bus system; Inductance; islanding; superconducting magnetic energy storage (SMES); Renewable energy; Electrical network; Loss of mains; Output voltage; Voltage; Impedance; Superconducting magnetic energy storage; Current source inverter; Superconducting magnet energy storage; Energy storage
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2012.2232703

The purpose of this paper is to propose the collaborative operation schemes of superconducting magnetic energy storage (SMES) for the current source inverter fed distributed power system (DPS) under the islanding mode. The key is to propose the closed-loop output voltage control for the current source inverter fed SMES to support the bus voltage at point of common coupling when the DPS is disconnected from the main grid. The droop control of voltage amplitude and frequency is designed to make different SMES units share the loads in DPS equally. To mitigate the effect of uncertain line impedance on power sharing, the virtual impedance control is added to construct a virtual output inductance for the SMES. The grid-connected operation is also proposed for the SMES to provide stable output power when the DPS is connected to the main grid. The computer simulation is carried out to verify the performance of the proposed operation schemes.