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Abstract Wide-area voltage monitoring and control system needs a fast, accurate index. This paper addresses a linearized motor voltage stability index(LMVSI) considering induction motor load characteristics. The proposed index has two advantages: ① no need of computing the network equivalents, this will improve the accuracy and computation speed of the index. ② full linearity, so this can be used to predict the load margin. NewEngland 39-bus test system and a 474-bus system are used to test the linearity degree, the computation speed of the index and the real monitoring results of the developed real-time voltage stablity monitoring system, respectively. Test results indicate that the proposed LMVSI is computationally light, fairly linear and highly accurate.
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Received: 12 January 2009
Published: 04 March 2014
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2010, Vol. 25 
