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Summary
A real-time optimal excitation controller (RTOEC) is proposed in this paper. The identifier in the RTOEC can properly identify the system parameters by the nonlinear least squares method. Thus a new optimal feedback matrix can be calculated in real-time from the identification results and the disturbances in the system. So the RTOEC can track quickly the operating status of the generator and always provide optimal control. Simulation studies carried out on the Three Gorges 700MW hydropower generator show that the RTOEC can provide good performance over a wide range of operating conditions and improve the static and transient stability of power system effectively.
Additional information
Notes on contributors
Fan Shu
Fan Shu received his B.S. and M.S. degrees in Department of Electrical Engineer, from Huazhong University of Science and Technology (HUST), in 1995 and 2000 respectively. Presently he is working for his Ph.D. degree in HUST. His research interests are power system operation and intelligent control system.
Mao Chengxiong
Mao Chengxiong received his B.S., M.S. and Ph.D. degrees in electrical engineering, from HUST, Hubei China, in 1984, 1987 and 1991 respectively. He was appointed as visiting scholar at University of Calgary, Canada from 1989 to 1990, at Queen’s University Belfast from 1994 to 1996 and at Technische University Berlin from 1996 to 1997. Presently, he is a professor of HUST. His fields of interest are power system operation and control, the excitation control of synchronous generator and applications of high power electronic technology to power systems.
Lu Jiming
Lu Jiming received his B.S. degree from Shanghai Jiaotong University, and received his M.S. degree from HUST. His research is focused on the excitation control based on microcomputer.
O.P. Malik
O. P. Malik received the National Diploma in electrical engineering from Delhi Polytechnic, Delhi, India, the M.E. degree in electrical machine design from Roorkee University, Roorkee, India, the Ph.D. degree in electrical engineering from the University of London, London, U.K., and the D.I.C. degree from Imperial College, London, U.K., in 1952, 1962, and 1965, respectively.
In 1974, he became a Professor in the Department of Electrical and Computer Engineering, University of Calgary, Calgary, AB, Canada, and is presently a Professor Emeritus there. He has performed research in collaboration with teams from Russia, Ukraine, China, and India. In addition to his research and teaching, he has served in many additional capacities at the University of Calgary including Associate Dean Academic/Student Affairs and Acting Dean of the Faculty of Engineering.