Delhi Transco Limited

Delhi Transco Limited

Delhi Transco Limited is the State Transmission Utility for the National Capital Territory of Delhi. It is responsible for the transmission of power at 220 kV and 400 kV level and for upgrading, operating and maintaining the high voltage network.

A transmission substation increase the voltage of electricity coming in to allow it for long distance transmission.


History of Electricity in Delhi

The position is that as per available records, the first diesel Power Station was established in Delhi in the year 1905 when a private English Company by name M/s. John Fleming was given permission to generate electricity under the provisions of the Indian Electricity Act 1903. The above mentioned Company was given the responsibility both of generation and distribution of power in a limited manner. That Company after obtaining license under the provisions of Electricity Act 1903 had set up a small 2 MW Diesel set at Lahori Gate in Old Delhi. Later on, this very Company was converted as Delhi Electricity Supply and Traction Company. In the Year 1911, the power generation was augmented by Steam Generation Station. In the year 1932, the management of Central Power House was handed over to New Delhi Municipal Committee (NDMC). In the field of power generation and distribution, a major break through was achieved in 1939 when Delhi Central Electricity Power Authority (DCEPA) was established. This Company was responsible for the supply of power to the areas covered by Local Bodies, namely, the Municipal Committees of Delhi, West Delhi and South Delhi, the Notified Area Committees of Red Fort, Civil Lines, Mehrauli, Najafgarh, and the District Board of Delhi. The supply of electricity to the Municipal Committees of Delhi-Shahdara and the Notified Area of Narela was done by different private agencies. In 1947 DCEPA took over a Private Limited Company by name Delhi electric Supply & traction Company Limited.

Formation of Delhi State Electricity Board (DSEB)

In the year 1951 the Delhi State Electricity Board (DSEB) came into existence and the responsibility of generation and distribution of electricity was taken over by DSEB from DCEPA.

Formation of Delhi Electric Supply Undertaking (DESU)

After the promulgation of the Delhi Municipal Corporation Act 1957, the DSEB was dissolved and the functions of DSEB were taken over by Delhi Electric Supply Undertaking (DESU), which came into existence in 1958. After the formation DESU, the generation and distribution of electricity to all the areas of Delhi came under DESU.

Formation of Delhi Vidyut Board (DVB)

The Government of the National Capital Territory of Delhi vide notification No. F.11 (10)/92-LSG /PF (II) dated 24.02.1997, issued under the Electricity (Supply) Act, 1948, constituted a separate Electricity Board, i.e. the Delhi Vidyut Board (DVB) for the NCT of Delhi w.e.f. 24.02.1997 for the purpose of generation and distribution of power to the entire area of NCT of Delhi except the areas falling within the jurisdiction of NDMC and Delhi Cantonment Board.

Unbundling of Delhi Vidyut Board (DVB)

The power situation in Delhi till a few year ago was yet another example of man’s incapacity to handle another form of energy. The Delhi Vidyut Board (DVB) was a State Electricity Board set up in 1997 under the Electricity (Supply) Act, 1948, succeeding the Delhi Electricity Supply Undertaking (DESU) which has existed since 1957 as a wing of the Municipal Corporation of Delhi. It was an integrated utility with generation, transmission and distribution functions serving all of Delhi except the NDMC and MES (Cantoment) areas to which it supplied power in bulk.

The creation of DVB, replacing DESU, is 1997 proved to be merely a change in the legal status of the organization and was not followed by any real change in its structure, functioning and work culture. Its reputation continued to deteriorate and its poor commercial performance, the best known thing about DVB perhaps being its high Transmission and Distribution (T&D) losses made it a drain on the public exchequer. Further, failure in raising the resources necessary for improvement of its services made matters critical. There were unprecedented, widespread expressions of public discontent during the difficult summer of 1998.

In December 1998 when the present Government came to power in Delhi, the power situation was grim to say the least. With T & D losses as high as 50% regular power cute for 10 to 15 hours and Delhi Vidyut Board accumulating liabilities of over Rs. 23,000 crores, Delhi Government had to come up with a fast and viable alternative. An alternative that would not only meet people’s aspirations in terms of its end result but also be interesting enough for investors. And thus began a step by step process of a never-before fundamental power reform.

Delhi Electricity Board Regulatory Commission (DERC) was constituted in May 1999 whose prime responsibility was to look into the entire gamut of existing activity and search for various ways of power sector reforms. The DERC is even today a fully functional body which has since issued tariff orders for annual revenue requirement. Delhi Electricity Reform Ordinance, 2000 was a body which was promulgated in October 2000 and notified in the form of an Act in March 2001. It mainly provides for the constitution of an Electricity Regulatory Commission, unbundling of DVB into separate generation, transmission and distribution companies and increasing avenues for participation of private sector.

This was followed with a Tripartite Agreement which was signed by the Government of Delhi, DVB employees to ensure the cooperation of stakeholders in this reform process. The tripartite agreement sent off very positive vibes to the people in general as well as to the investor community about the sincere and hassle-free objectives of power reforms.

Next, a two stage competitive bidding process of Request for Qualification (RFQ) and Request for Proposal (RFP) was set into motion for privatization of the distribution companies.

The bidders were selected on the basis of reduction of total Aggregate Technical and Commercial of losses (AT & C) a unique feature of the power sector reforms in Delhi. The bidders were required to bid on the basis of efficiency improvement like reduction of AT & C losses that they achieve year wise over a period of five years.

Formation of Delhi Transco Limited (DTL)

On July 1, 2002,The Delhi Vidyut Board (DVB) was unbundled into six successor companies: Delhi Power Supply Company Limited (DPCL)- Holding Company; Delhi Transco Limited (DTL) - TRANSCO; Indraprastha Power Generation Company Limited (IPGCL) - GENCO; BSES Rajdhani Power Limited (BRPL) - DISCOM; BSES Yamuna Power Limited (BYPL) - DISCOM; North Delhi Power Limited (NDPL) - DISCOM.

The Government handed over the management of the business of electricity distributions to there private companies BRPL , BYPL and NDPL since July 1, 2002 with 51% equity with the private sector.(DVB itself was the successor entity to the Delhi Electricity Supply Undertaking (DESU).

Of these five companies, BRPL, BYPL and NDPL are joint ventures between the Delhi Government and the private sector which handle the power distribution sector in Delhi. BRPL is responsible for distribution of power in Central, South and West Delhi. BYPL handles power distribution in East Delhi (Trans-Yamuna). NDPL distributes power in North and North-West Delhi. The remaining two companies, DTL and IPGCL, are wholly owned by the Delhi Government. Delhi Transco Limited is a 'State Transmission Utility of the National Capital of Delhi', whereas IPGCL is responsible for power generation.

Over the years, DTL has evolved as a most dynamic performer, keeping pace with the many-fold challenges that confront the ever increasing demand-supply-power-situation and achieving functional superiority on all fronts. The Transmission losses have been brought down from 3.84% in 2002-03 to 0.83% in 2006-07, and are the lowest in the country. Delhi, being the capital of India and the hub of commercial activities in the Northern Region, coupled with the prosperity of population, the load requirement has been growing at a much faster pace. Added to that, being the focus of socio-economic and political life of India, Delhi is assuming increasing eminence among the great cities of the world. Plus the vision-2021, aiming to make Delhi a global Metropolitan and world class city demands greater infrastructure to enrich many services of infrastructure development.

DTL, has been responsibly playing its role in establishing, upgrading, operating and maintaining the EHV (Extra High Voltage) network. DTL has also been assigned the responsibility of running the State Load Dispatch Centre which is an apex body to ensure integrated operations of power systems in Delhi.

Transmission Network of DTL

Existing Transmission Network

The existing network of DTL consists of a 400KV ring around the periphery of Delhi interlinked with the 220KV network spread all over the city. Summary of Transmission of DTL is as given below.

Transmission lines
Parameters 400KV Level 220KV Level
No. of Subatations 2 25
Transmission Capacity (in MVA) 3465 7860
Transmission Lines (length in Ckt. Km.) 227 574.2 + 40.206 (under ground)

Future Plans

The Commonwealth Games are scheduled to be held in 2010 in Delhi and the electricity is one of the most important requirements for creating infrastructure for such a mega event. Delhi Transco Ltd has geared up to strengthen its network to fulfill the demand. We aim following capacity addition up to the financial year 2011-12.

Parameters 400KV Level 220KV Level
Transmission Capacity (in MVA) 5355 10415
Transmission Lines (length in Ckt. Km.) 281 849

List of Substations

400kV Substations

400kV Existing Substations 400kV Proposed Substations
Bawana , Mundka , Bamnauli East of Loni (Harsh Vihar)

220kV Substations

220kV Existing Substations 220kV Proposed Substations
Narela, Rohini, Subzi Mandi, Ridge Valley Electric Lane
Najafgarh, Sarita Vihar, Geeta Colony, DAIL Masjid Moth
Mehrauli, Vasant Kunj, Pappankalan -I Peeragarhi
IP Estate, Gazipur, Lodhi Road Wazirpur
Patparganj, South of Wazirabad, Kashmere Gate, AIIMS Rohini
Okhla, Naraina, DSIDC Bawana
Gopalpur, Pappankalan -II, Parkstreet
Shalimar Bagh, Kanjhwala

Power Arrangements of Delhi

DTL had been arranging power from various sources for all the five distribution licensees since 1 July 2002. Keeping in mind the Commonwealth Games 2010 it had signed Power Purchase Agreements for more than 9000 MW of power. This arrangement continued till 31 March 2007. From 1 April 2007 onwards all the distribution agencies are directly purchasing power and all the long and short term Power Purchase Agreements have been transferred to these agencies by Delhi Electricity Regulatory Commission (DERC) on the basis of their consumption. Now it is the responsibility of the distribution companies to arrange power for their respective areas. However a Power Procurement Group has been formed to coordinate the procurement and sale of power which is headed by a DTL Officer. Now DTL is responsible only for efficient transmission of power.

Power Supply Position of Delhi Over the Years

There has been considerable improvement in the power supply position at the end of five years of restructuring of power sector of Delhi. The peak demand is increasing every year while the load shedding has reduced tremendously.[1]

Parameters 2002-03 2003-04 2004-05 2005-06 2006-07 2007-08 2008-09 2009-10
Peak Demand met in MW 3097 3289 3490 3626 3736 4030 4034 4408
Energy consumption in MUs 19686 20385 20810 21184 21977 22372 22006 23349
Shedding, in MUs 450 229 176 322 411 136 128 185
Shedding as %age of Energy Consumption 2.29% 1.12% 0.84% 1.50% 1.87% 0.61% 0.58% 0.80%
Transmission losses (in %age) 3.84 % 1.69% 1.30% 0.72% 0.83% 0.95% Data not available Data not available

Revenue Statistics

Key Statistics .[2]

Year 2004-05 2005-06 2006-07 2007-08 2008-09
Revenue (INR billions) 46.61 52.10 57.39 2.45 3.92
Profit after tax (INR billions) (9.55) 0.94 0.35 0.52 0.63

Figures 2005-06 include revenue from supply and purchase of bulk supply

Transmission Load Forecast for 11th Plan

As per the projections made by Central Electricity Authority in its 17th EPS report and the recommendations for the transmission requirements for Delhi systems in the 11th Plan System Studies report of Central Electricity Authority for the period 2007-2012.

Transmission Load Forecast for Delhi

As per Statistics published on DTL's website .[3]

Year 2008-09








Anticipated Demand as per 17th Electric

Power Survey of CEA

4877 5253 5657 6092
Anticipated Demand calculated as per CEA’s Grid Monitoring

Methodology on the basis of previous years Data

4034 4425 4626 4837
Anticipated Demand calculated as per the Trend of

Actual of last 10 years

4034 4255 4489 4735

Anticipated Demand as per 17th Electric Power survey (MW)

The year wise anticipated demand of Delhi as per 17th Electric Power survey of CEA is indicated in the above mentioned table from which it is evident that there is a 7 to 8 % increase yearly in the demand of power in Delhi during 2008-12.

Care for Environment

DTL operates its obligations in a clean, green pollution free environment and, has been providing more green coverage to the National Capital. It is spreading awareness among the masses to use eco-friendly electrical appliances. DTL is also introducing Energy Conservation Building Code in Delhi to maximize the use of natural resources and minimize the use, of electricity. Its proposed corporate office at 400 KV Sub Station Maharani Bagh will be a Green Building. The building is aimed to be a Platinum Rated Green Building. More than one lac sq meter land has been earmarked for plantation in the ensuing year.

Electricity Consumers Grievance Handling System

Department of Power, Government of NCT of Delhi has established Public Grievance Cell to look into the complaints of electricity consumers. DTL has played a vital role in its establishment and is actively participating in its smooth and proper Functioning.

See also


External links

Power Companies in New Delhi, India

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