Comparative Analysis of HVAC and HVDC Transmission Line

Electrical power needs to be transmitted over longer distances from generating stations to load centers for distribution to the consumers. In orders to transmits power at longer distance better transmission system is required it may be HVAC or HVDC. In Pakistan HVAC transmission is done in 220kV, 500kV, 132kV and 66kV. In Pakistan up to 2016, there was no HVDC transmission system. Recently two projects are under construction, the first project from Iran to Pakistan through Turkmenistan (±500kV) and the second project started in 2017 (HVDC ±660kV) from Metairie to Faisalabad. The HVAC transmission system is affected by various factors like environmental factors and power losses in transmission line. Moreover, HVAC is hazardous for human life. A comparative study is done in order to compare HVAC and HVDC transmission line in term of performance, infrastructure, cost and modeling of transmission line. As there is energy crisis in Pakistan 10 to 15% losses in power transmission take place. In order to minimize these losses, reselection of either HVAC, HVDC or hybrid system are considered for either existing power transmission system or new transmission system, like Metairie to Faisalabad HVDC ±660kV. For this purpose, a deducted comparative analysis of HVAC and HVDC transmission system is proposed.