Anpara–Unnao Transmission Line
Anpara–Unnao Transmission Line

Sectors

Transmission & Distribution, Power

Services

Design & Engineering

Location

Uttar Pradesh, India

The project involved development of an extra high voltage transmission line connecting Anpara and Unnao in Uttar Pradesh. The transmission corridor has a total length of approximately 405 kilometres and was designed for operation at 800 kV. The line was initially planned to be operated at 400 kV until commissioning of associated generation and switchyard infrastructure.

The transmission line configuration includes a four moose conductor bundle per phase. The alignment includes major river crossings over the Son River and the Ganga River. The system was planned to support long term power evacuation and strengthen the regional transmission network for future load growth. The design accounted for ultra-high voltage electrical performance, long spans and challenging terrain conditions.

TCE's Scope

TCE carried out preliminary route alignment surveys and limited soil investigations to validate geotechnical data for inclusion in tender specifications. Detailed system studies were undertaken, including load flow studies, electrostatic and electromagnetic influence studies, and optimisation studies for selection of conductor, earthwire, insulators, tower configuration and ruling span.

TCE supported preparation of draft tender documents, bid evaluation, review of vendor drawings and inspection of equipment at manufacturers’ works. Construction supervision, testing and commissioning support were also provided as part of the assignment.

Impact

The project contributed to development of one of the earliest extra high voltage transmission corridors in the country. It enabled phased operation at 400 kV with readiness for future 800 kV operation, strengthening grid reliability and creating a foundation for large scale power evacuation in the region.