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International Journal of

Recent Trends in Engineering

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International Journal of Recent Trends in Engineering (IJRTE)

ISSN 1797-9617

Volume 1, Number 4, May 2009

Issue on Electrical & Electronics

Page(s): 49-51

Pricing of System Security in Deregulated Environment

Mala De

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Abstract

This paper proposes a pricing system for power system security in deregulated electricity market that includes voltage stability constraint in a multi-objective OPF problem. The OPF maximizes social benefit, as well as the distance from the voltage-collapse point. While pricing system security, ancillary service such as reactive power has been included. Effect of N1 contingency on pricing is analyzed. Price is decided one day ahead using forecasted demand data. The market participants bid according to their marginal price and market-clearing price is decided by matching the generation and demand side bidding. ATC is computed by repeated power flow, considering bus voltage limit and line thermal limit. The ATC shows the amount of congestion. This pricing system is tested on IEEE 14-bus test system and is implemented using MATLAB and GAMS.

Index Terms

voltage stability constraint, ATC, contingency

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