期刊
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
卷 32, 期 3, 页码 210-217出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijepes.2009.07.008
关键词
Delay-independent; WAMS; Decentralized coordinated control; Time delays; H-infinity control method; LMI
资金
- National Science Foundation of China [60874023]
Technological advance of wide-area measurement systems (WAMS) has enabled the use of a combination of measured information from remote location for transient stability enhancement. However, there exist time delays when remote signals are transported in WAMS. Moreover, the time delays are multiple and uncertain, and depend on the distance, protocol of transmission and several other factors. In order to improve the transient stability of wide-area power system, taking into account the impacts of the time delays and the uncertainties introduced by nonlinearity in system model, a delay-independent decentralized coordinated robust approach is proposed to design excitation controller in terms of H-infinity optimization method incorporating linear matrix inequality (LMI) technique based on T-S fuzzy model by using wide-area signals. Simulation demonstrates that the four-machine large system under the robust excitation controller has better transient stability performance in the face of various transmission time delays, severe variations of operating point and faults in various locations. (C) 2009 Elsevier Ltd. All rights reserved.
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