State estimation and total transfer capability calculation in deregulated power system

Abstract

In a deregulated power system both the quality and amount of power transfer increases. The main challenges in deregulated environment for the utility centers are to update or maintain the reliability and security of the utility regions. By sharing the information about different states of the system, is a way to overcome these limitations, among different utilities. The utilities get an overall picture of the entire system with the information get from Total Power Transfer Capability (TTC) and State Estimation of the power network. It should be taken care that the combined effects of power transfer due to different estimations and power transfer capabilities may not tend to a system blackout, failure of equipment and overloading problems. State Estimation (SE) used to estimate new error case state variables after a certain random error occurs in the power system due to contingency and Continuous Power Flow method is chosen for the calculation of TTC. In this study we have used this technique for testing IEEE 30 bus test system and a brief comparative study is done among different cases of the system.