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《Power System Technology》 2006-24
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Study on Weak Buses of Voltage Stability Based on Sensitivity of Minimum Singular Value

CHEN Min,ZHANG Bu-han,DUAN Xian-zhong,HU De-feng (School of Electrical and Electronic Engineering,Huazhong University of Science and Technology, Wuhan 430074,Hubei Province,China)  
As an index of static voltage stability the minimum singular value is widely used in power system stability analysis. On the basis of minimum singular value analysis, the sensitivity of minimum singular value to load power is derived and it is proposed that to apply minimum singular value in the analysis of weak buses and to determine which bus should be compensated. Taking IEEE 57-bus system for example, the influence of load variation on minimum singular value is analyzed while the loads are increased in average, then the weak region and the weakest bus in the power system are determined. Calculation example shows that it will be more effective for the improvement of system voltage level as well as voltage stability while the reactive power compensation is located at the determined weakest bus.
【Fund】: 教育部重点基金资助项目(1041)~~
【CateGory Index】: TM714.2
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