Power Grid Corporation of India

History

The Power Grid Corporation of India Limited was incorporated on 23 October 1989 under the Companies Act, 1956 with an authorized share capital of Rs. 5,000 Crore (subsequently enhanced to Rs. 10,000 Crore in Financial Year (FY) 2007–08) as a public limited company, wholly owned by the Government of India with 51.34% stake in the company as on 31 December 2020 and as principal electric power transmission company for the country.

Its original name was the "National Power Transmission Corporation Limited", which was charged with planning, executing, owning, operating, and maintaining high-voltage transmission systems in the country. On 8 November 1990, the firm received its Certificate for Commencement of Business. Their name was subsequently changed to Power Grid Corporation of India Limited on 23 October 1992.

Power Grid management started functioning in August 1991 and subsequently took over transmission assets from National Thermal Power (NTPC), National Hydroelectric Power Corporation (NHPC), North Eastern Electric Power Corporation Limited (NEEPCO), Neyveli Lignite Corporation (NLC), and other companies such as NPC, THDC, SJVNL in a phased manner; it commenced commercial operation in January 1993.

It also took over the operation of existing Regional Load Despatch Centers (RLDCs) from the Central Electricity Authority (CEA), in a phased manner from 1994 to 1996, which have been upgraded and modernized with Unified Load Despatch and Communication (ULDC) schemes. The National Load Despatch Centre (NLDC) was established in 2009 for overall coordination at the national level. Later, the company diversified into the telecom sector for efficient use of its spare telecommunication capacity of unified load dispatch center (ULDC) schemes and also leveraged its country-wide transmission infrastructure.

According to its mandate, the corporation, apart from providing a transmission system for evacuation of central sector power, is also responsible for the establishment and operation of regional and national power grids to facilitate the transfer of power within and across the Regions with reliability, security, and economy on sound commercial principles. Based on its performance, the firm was recognized as a Mini-Ratna Category-I Public Sector Undertaking in October 1998. It was conferred with the status of "Navratna" by the Government of India in May 2008 and "Maharatna" status in October 2019.

Historical landmarks

Following are the historical landmarks in the lifetime of the company from the date of formation:

2008 - completed the 220 KV Double Circuit Transmission line from Pul-e-Khumri to Kabul Transmission System in Afghanistan.

2006 - Commissioned the unified load despatch and communications scheme for the western region and also entered into an agreement with REC and certain state governments and state utilities for undertaking rural electrification works under the Rajiv Gandhi Grameen Vidyutikaran Yojana in nine states in India.

Business

Power Grid operates throughout India and covers 90% of country's interstate and inter-regional electric power transmission system and its business segments include Transmission, Consultancy, Telecom and ULDC/ RLDC. Its transmission network consists of roughly 168,140 circuit kilometers and 252 EHVAC and HVDC substations, with total transformation capacity of 422,430 MVA as of 31 January 2021, and an availability of over 99%. Power Grid's interregional capacity is 75,050 MW. Examples of Power Grid-owned stations include the Vizag back-to-back HVDC converter station, the Chandrapur back-to-back HVDC converter station, and the Talcher–Kolar HVDC system.

Power Grid is listed on both the BSE and the NSE. As of 30 September 2010, there were 792,096 equity shareholders in Power Grid. Initially, Power Grid managed transmission assets owned by NTPC, NHPC Limited, and NEEPCO Limited. In January 1993, the Power Transmission Systems Act transferred ownership of the three power companies to Power Grid. All employees of the three companies subsequently became Power Grid employees.

Powertel

Power Grid's telecom company, Powertel, operates a network of 100,000 kilometres (62,000 mi) and has points of presence in 3000+ locations across India.

Transmission network failures

About 2:35 a.m on 30 July 2012, the Northern Region Grid, which provides power to nine states in northern India, including Delhi, experienced a widespread outage due to a grid disturbance. Power Grid and POSOCO began work immediately to restore power. By 8:00 a.m. essential services had been restored, with 60 percent of the normal Northern Region Grid load restored by 11:00 a.m. Power supply was then restored progressively, and by 12:30 p.m. power was extended to most of the cities and towns through Power Grid substations. The Northern Region Grid was brought back to normalcy to meet the demand of about 30 GW at 7:00 p.m.