DocumentCode :
3467570
Title :
Evaluation of dynamic voltage stability of a power system
Author :
Haque, M.H. ; Pothula, U. M R
Author_Institution :
Sch. of Electr. Eng., Nanyang Technol. Univ., Singapore
Volume :
2
fYear :
2004
fDate :
21-24 Nov. 2004
Firstpage :
1139
Abstract :
Voltage stability is one of the major factors that dictates the maximum loadability of a power system. This paper investigates the dynamic aspect of voltage stability problem of a simple power system by considering the dynamic effects of both fast-acting and slow-acting devices. A comprehensive computer program in Matlab/Simulink environment is developed for this purpose. The effects of slow acting devices, such as on load tap changers, over exciter limiters, etc. on long-term voltage stability is vigorously tested. It is observed that, for some disturbances, the system may not face any voltage instability problem in short-term but it may suffer from voltage instability problem in long-term because of the activation of generator over exciter limiter. It was also observed that both the short-term and long-term voltage stability limits can be improved by providing adequate reactive power support at load buses.
Keywords :
limiters; mathematics computing; on load tap changers; power system analysis computing; power system dynamic stability; power system faults; reactive power; voltage regulators; Matlab/Simulink; computer program; load buses; on load tap changers; over exciter limiters; power system disturbances; power system dynamic stability; reactive power; slow acting devices; voltage collapse; voltage instability; voltage stability; Induction generators; Induction motors; Power generation; Power system dynamics; Power system modeling; Power system simulation; Power system stability; Reactive power; Testing; Voltage control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power System Technology, 2004. PowerCon 2004. 2004 International Conference on
Print_ISBN :
0-7803-8610-8
Type :
conf
DOI :
10.1109/ICPST.2004.1460172
Filename :
1460172
Link To Document :
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