Addressing specific challenges for harsh environmental conditions and integration with large solar park for Khavda – Nagpur HVDC transmission

(Zone-V) and highly polluted environment at Khavda being near to coastal area as well having active salt lakes in the near vicinity of the Khavda HVDC converter station. This has led to requirement of Indoor DC Hall, comparatively higher creepage in outdoor switchyard area and humidity-controlled environment with absolute filters for DC hall to address highly polluted environment of Khavda region.

This paper also highlights the challenges of the performance requirement for HVDC interconnection with solar farms related to commutation failure, HVRT/LVRT requirement

(high voltage ride through/low voltage ride through), Split 400 kV AC bus configuration at

Khavda with operation feasibility of both bus sectionaliser on AC buses Open/Close at both converter stations. The fulfilment of high seismic zone requirement for valve structures inside valve hall and other main circuit equipment of the station are covered. The challenges related to the interconnection of HVDC System with large solar parks to fulfil the Grid India requirement for integration with grid will be the reference for the upcoming HVDC Projects in

India, which is growing with more IBR electric generation coming on line. The fulfilment of stringent requirement of dynamic performance study of HVDC station with nearby other HVDC installations, RE park and Statcom devices is first of its kind in India and will be the reference for future upcoming HVDC Projects.