In this paper, the authors studied the coordination of under frequency load shedding (UFLS) and under frequency governor control (UFGC) by applying the distributed superconducting magnetic energy storage (D-SMES) devices. The active power of D-SMES device is controlled to eliminate the initial rapid frequency drop and allow time for the full action of UFGC to take over. The reactive power of D-SMES is controlled to stabilise the local bus voltage. The research results show that D-SMES devices can damp the quick dropping of system frequency and hold it waiting for the full activation of system spinning reserve. D-SMES can help the governors output their maximum reserve before UFLS drops more load.

Meeting Name

IEEE Power Engineering Society General Meeting (2005: Jun. 12-16, San Francisco, CA)


Electrical and Computer Engineering

Keywords and Phrases

Active Power; Bus Voltage; Distributed Superconducting Magnetic Energy Storage Devices; Frequency Control; Frequency Drop Elimination; Load Shedding; Reactive Power Control; Spinning Reserve; Stability; Superconducting Magnet Energy Storage; under Frequency Governor Control; under Frequency Load Shedding

International Standard Book Number (ISBN)


International Standard Serial Number (ISSN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2005 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Jun 2005