State-run thermal power plants in Gujarat are set for a major overhaul. This would make them more energy efficient; reduce variable cost of power generation and maintenance cost.
The state power generation company Gujarat State electricity Corporation Limited (GSECL) has decided to replace existing old and inefficient units by new supercritical technology units.
First phase would see replacement of over three decade old 120 MW units at Gandhinagar, Ukai and Sikka thermal power plants. Current GSECL is having total installed thermal power capacity of 5884 MW using fuels like coal, lignite and gas. It operated runs over a dozen power plants including hydro power plants in the state.
This is first major initiative of the state government to improve the efficiency of the state-run power plants. “The 120 MW units are of very old design. Hence, the variable cost of generation from these units is high due to higher heat rate,” said a senior officials of the department of energy and petrochemicals.
He said that now improved and supercritical coal based units with higher capacity, higher efficiency; low auxiliary power consumption and low heat rate are available. Hence, there was a need to replace the old technology with the new one. Another reason for this overhaul is that for setting up new power plants land acquisition was a major hurdle. “Therefore, it is worthwhile to replace existing old and inefficient units by new supercritical technology units by demolishing the old one,” he added.
GSECL has now commissioned a feasibility study to replace the existing units with super critical technology. In the first phase, two 120MW units each in Gandhinagar, Ukai and Sikka thermal power plant will be replaced.
Recently, GSECL awarded Rs 206 crore contract to renovate and modernize two steam turbines at Ukai and Wanakbori thermal plant. Under this contract the 200 MW turbines at Ukai and Wanakbori would be retrofitted to increase its efficiency by around 14 percent from existing operating conditions thereby reducing coal consumption and carbon dioxide emissions.