Investigation of Split TCSC on Kanpur-Ballabhgarh Transmission System

This paper investigates the performance of the single TCSC and proposed split TCSC on transmission system where India’s first TCSC project is installed in Kanpur Ballabhgarh (KB) line to ensure the fine tuning of line reactance by proposed split TCSC in place of existing KB TCSC. A three phase KB transmission system is developed in MATLAB/Simulink (SimPowerSystems) for a) without any compensation, b) with fixed capacitor (FC), c) with FC + existing KB TCSC and d) with FC + proposed split TCSC The KB system is analyzed for a step variation of load and performance of the system is investigated with a closed loop reactance control method. Keywords—Single TCSC, Split TCSC, TCSC Reactance characteristic curve, Power flow analysis, Sensitivity analysis. NOMENCLATURE α Firing angle in degrees XL Inductive Reactance of TCR in ohms XC Capacitive reactance in ohms XL(α) Variable Inductive Reactance of TCR with respect to firing angle (α) in ohms. XTCSC(α) Net reactance across TCSC in ohms. XTCSC(α1) Reactances of Split TCSC varies with firing angle α1 XTCSC(α2) Reactances of Split TCSC varies with firing angle α2 ω Constant, √(XC/XL). ∆X Change in reactance in ohms K Degree of series compensation K1 & K2 Degree of series compensation for split TCSC XTotal Effective transmission line reactance including single TCSC reactance in ohms