Phase Wise Voltage Stability Analysis of EHV System

Kumar, Santosh A and Thukaram, D (2016) Phase Wise Voltage Stability Analysis of EHV System. In: 2nd Biennial International Conference on Power and Energy Systems - Towards Sustainable Energy (PESTSE), JAN 21-23, 2016, Bangalore, INDIA.

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Abstract

Unbalanced multiphase networks poses the problem of voltage instability. Generally, voltage stability analysis of power systems are performed on the basis of single phase representation. Although, this model is adequate tor most of the purposes, it fails to provide solution in case the systems has untransposed lines and possible unbalances arising in load and generating conditions. Hence, there is a need for analysis using actual three phase representation, facilitating simulation of all possible unbalanced operating conditions. This paper extends the well-known static voltage stability index L for Three phase analysis. The three phase power flow is used for the computation of phase wise L-Index of all the load nodes. It is shown how incorporation of PMU can be used tor real time monitoring of the system. The quantitative analysis of unbalance of voltage at all the nodes is also studied using the index MV0 and MV2. For the simulation purpose, a practical 12 bus EHV system is considered and case studies are presented to illustrate the phase wise voItage stability.

Item Type:	Conference Proceedings
Additional Information:	Copy right for this article belongs to the IEEE, 345 E 47TH ST, NEW YORK, NY 10017 USA
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	31 Jan 2017 05:31
Last Modified:	31 Jan 2017 05:31
URI:	http://eprints.iisc.ac.in/id/eprint/56136

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