Tata Power has announced the signing of agreements with Siemens Power Generation, Germany and Doosan Heavy Industries & Construction, Korea to bid for ultra mega projects (3,500 to 3,800 MW supercritical steam power plants).According to an official release issued by Tata Power to the BSE today, the EPC consortium of Tata, Siemens and Doosan Heavy Industries will bid for the design and construction of power plants based on super-critical technology required for such large-sized units.The government of India has announced the implementation of several ultra mega power projects through an international competitive bidding process. The company has submitted its expression of interest for four ultra mega power projects, one each in Gujarat, Madhya Pradesh, Maharashtra and Karnataka. Consequently, the company has received the request for qualification documents for the Sasan project in Madhya Pradesh and the Mundra project in Gujarat. This development comes on the back of the recent announcement made by the company to augment its generation capacity by over 4,500 MW involving investment of Rs 18,000 crore, the release added.Adi Engineer, director of Tata Power, said: "This agreement is a significant step towards our plans to bid for ultra mega projects by drawing on the expertise of strong international partners like Siemens and Doosan Heavy Industries. The formation of this EPC consortium will help in facilitating an excellent technical solution which is also cost-competitive".