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《Journal of Electric Power Science and Technology》 2009-01
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Generalized voltage collapse index for long transmission network

Bharat Singh1,S.N.Singh1,WEN Fu-shuan2(1.Department of Electrical Engineering,Indian Institute of Technology,Kanpur208016,India;2.School of Electrical Power,South China University of Technology,Guangzhou 510640,China)  
A generalized voltage collapse index(GVCI) is derived which represents the distance to voltage collapse in terms of loading margin to maximum loading for long radial transmission system(or overhead/submarine cables) having substantial capacitive impedance.GVCI is an instantaneous value used to initiate the relay for control and protection by employing a set of local measurement provided by Phasor Measurement Unit(PMU).The effectiveness of the proposed GVCI is tested on a simple two-bus double circuit line and the effects of On-Load Tap Changers(OLTC) operation on voltage collapse have been analyzed analytically by extending the GVCI formulation to incorporate settings of OLTC.The proposed GVCI is compared with L-index for voltage collapse conditions.Finally,a possible application of the proposed index on remotely located wind farms is discussed.
【Fund】: 国家自然科学基金(50477029);; 教育部新世纪优秀人才基金(NCET-04-0818)
【CateGory Index】: TM712
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