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005			20260818090218.0
008			070825s2006 th uu|m rtt 0| a1eng d
035			_a.b12020473
099		9	_aAIT Thesis no.ET-06-21
100	0		_aVo Hoang Anh Tuan
245	1	0	_aDesign of a robust power system stabilizer using an integrated genetic algorithm, simulated annealing and tabu search
260			_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2006
300			_a99 p. : _bill.
490	1		_aThesis ; _vno. ET-06-21
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resource, and Development
502			_aThesis (M.Eng.) - Asian Institute of Technology, 2006
520			_aOne of the most important instability problems arising from large-scale electric power system interconnections is the low-frequency oscillations. The oscillations may be sustained for minutes and grow to cause system separation if no adequate damping at the system oscillating frequency is available. Although recently various other controller devices (SVC, STATCOM, FACTS) designed to enhance system stability found applications in today's modern power systems, PSS still remains an attractive solution, as it is a very cost-effective means to ensure power system stability and security. There are many types of PSSs with different input signals and design methods from simple to the complex one, from fixed structure fixed parameters to adaptive controllers. But the main issue has arisen is how to ensure the stability of the system in the wide range of the operating conditions. With this interesting issue, this thesis proposes a new design method based on the 11' norm of the complementary sensitivity function T(s) of the system with the helping of mixed GA, tabu search and SA searching method in tuning PSS parameters to get the robust PSS which can ensure system stability in the wide range operating conditions of the power system in reality. The stabilizer places the troublesome system modes in an acceptable region in the complex plane and guarantees a robust performance over a wide range of operating conditions. Conventional lead/lag PSS structure is retained but its parameters are re-tuned using mixed searching method to obtain enhanced performance. The efficacy of the proposed method has been tested on a single machine system. The proposed method of tuning the PSS is an attractive alternative to conventional fixed gain stabilizer design as it retains the simplicity of the conventional PSS and still guarantees the robustness over a wide range of operating and system condition
650		0	_aGenetic algorithms
650		0	_aElectric power systems
700	0		_aWeerakorn Ongsakul, _eChairperson
700	1		_aNadarajah, Mithulananthan, _eExamination Committee
700	0		_aSurapong Chiraratananon, _eExamination Committee
700	1		_aIssarachai Ngamroo, _eExamination committee
710	2		_aElectricity of Viet Nam, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. ET-06-21
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B10587
907			_a.b12020473 _bmnait _cu
902			_a240401
998			_b0 _c070825 _dm _ea _fu _g0
945			_lmnait
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942			_c22
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