Tata Power Delhi Distribution Limited (Tata Power-DDL) is a joint venture between Tata Power and the Government of NCT of Delhi with the majority stake being held by Tata Power Company (51%). Tata Power-DDL distributes electricity in North & North West parts of Delhi and serves a populace of 7 million. The company started operations on July 1, 2002 post the unbundling of the erstwhile Delhi Vidyut Board (DVB). With a registered consumer base of 1.6 million and a peak load of around 1960 MW, the company's operations span across an area of 510 sq. kms.
Tata Power-DDL has been the front-runner in implementing power distribution reforms in the capital city and is acknowledged for its consumer friendly practices. Since privatization, the Aggregate Technical & Commercial (AT&C) losses in Tata Power-DDL areas have shown a record decline. AT&C loss is a measure of overall efficiency of the distribution business which is the difference between units input into the system and the units for which the payment is collected. Today, AT&C losses stand at 8.5 % which is an unprecedented reduction of around 84% from an opening loss level of 53% in July 2002.