Performance Analysis of 765 kV system under Steady State and Transient Conditions with varying Reactive Compensation

This paper describes the analysis of 765 kV Extra High Voltage(EHV) transmission system which is a typical expan- sion of Indian power grid system, under Steady State and Tran- sient Conditions. The first step involves exhaustive power flow analysis, based on constraint power transfer capabilities of lines with series and shunt compensation. Later switching over voltage studies are carried out. Acceptable bus voltage profiles and satisfactory equipment loadings during all foreseeable operating conditions for normal and contingency operation are the guiding criteria. This paper presents steady state and switching transient studies on two typical 765kV EHV transmission systems.