Tata Power is planning to hike its generation capacity by 4,500 MW within the next 4 years, and has earmarked a capital expenditure of Rs 18,000 crore for the expansion.The company has already announced setting up of two 1,000 MW imported coal-based power projects near Rewas in Konkan, Maharashtra. It has also expressed interest in two power transmission contracts in Maharashtra and Gujarat."The Maharashtra government has already initiated the land acquisition procedure. With fuel prices touching a new high, we are negotiating with countries like Australia and South Africa for coal," Adi Engineer, director of Tata Power, said today. The company recently completed the first phase of 1,200 km Tala transmission line project, which is the first public-private project in transmission. The Rs 1,200 crore project will bring power from Tala hydro-power project in Bhutan to Delhi."Transmission is definitely an area of interest.We have already put up bids in Maharashtra and Gujarat. We see this as a potential area to invest," Engineer said.Tata Power recently commissioned its 120 MW Unit IV at its Jojobera plant, and is setting up another captive plant of same capacity at the Tata Steel plant in Jamshedpur."This unit would be based on utilising the waste gases generated during the steel-making process. It is expected to commence in 26 months. We are also discussing captive power projects at various plants of Tata Steel," Engineer added.