Background: Technical feasibility of Ultra High Voltage (UHV) Transmission system is proven through many UHV projects worldwide and research are going on to make it commercially viable. Rapid development of Power Electronics in the field of UHV AC power system is resulted in the economic and efficient transmission of bulk power over long-distances.
Methods: In order to improve the voltage profile of the transmission system, power transfer capability, transient and dynamic stability; flexible AC transmission system (FACTS) devices have been introduced at UHV level. The present paper focuses on the design and evaluation of TCSC system for the Indian UHVAC system for its Wardha Aurangabad Line, which is at present operating at 400 kV but will be upgraded soon to 1200 kV. A flow chart is prepared for the determination of the values of TCSC inductor and capacitor.
Result: PSCAD/ EMTDC Software-Simulation based study is carried out to analyze the behavior of UHV transmission line with TCSC. The effect of improvement in power transfer capability, with and without use of TCSC scheme; through Constant- Current mode, closed loop control; has been investigated for a healthy line and a faulty line.
Conclusion: The paper will prove a milestone for academicians, researchers, and design engineers in the field of Power Electronics and Power Systems.