Client: Tetra Tech
POWER Engineers provided a technical evaluation related to the transmission capacity of Afghanistan North East Power System (NEPS) between Pul-e-Khumri and Chimtala substations. The Pul-e-Khumri to Chimtala transmission line is a double-circuit 220 kV line approximately 202 km in length. The line was placed in service in 2008 and was built with a combination of two different conductors and was designed to carry 300 MW of power. The technical evaluation determined if the new line could support an additional capacity of 150 MW for a total of 450 MW. The study was funded by USAID and with Tetra Tech as the prime contractor.
The project was an Electrical Performance Systems Study focusing on the critical problems of voltage collapse, along with potential mitigation measures. A subcontractor performed power flow studies using already established models of the Afghanistan North East electrical grid. From this effort, POWER recommended alternatives to provide reactive compensation of the line using fixed shunt capacitors and Static VAR compensators. Four alternatives were evaluated and cost estimates were prepared for each alternative for consideration.