this article needs additional citations for verification . please help improve this article by adding citations to reliable sources . unsourced material may be challenged and removed . february 2013 learn how and when to remove this template message power grid corporation of india limited type government owned corporation traded as nse powergrid bse 532898 industry electric utility founded 23 october 1989 1989 10 23 headquarters gurgaon haryana india area served india key people shri is jha chairman and md products transmission and distribution ; energy trading revenue 208.02 billion us 3.1 billion 2015 16 1 net income 60.26 billion us 900 million 2015 16 1 total assets 1 784.28 billion us 27 billion 2016 1 number of employees 10 000 2012 website powergridindia.com the power grid corporation of india limited powergrid nse powergrid bse 532898 is an indian state owned electric utilities company headquartered in gurgaon india . powergrid transmits about 50 % of the total power generated in india on its transmission network . its subsidiary company power system operation corporation limited posoco handles power management for power grid . powergrid also operates a telecom business under the name powertel . shri i s jha an alumnus of national institute of technology jamshedpur serves as the chairman and managing director of the company . contents 1 origin 2 business 2.1 powertel 3 transmission network failures 4 utility factor of transmission lines 5 see also 6 notes 7 external links origin edit power grid corporation of india limited powergrid was incorporated on october 23 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 . its original name was the national power transmission corporation limited and it was charged with planning executing owning operating and maintaining high voltage transmission systems in the country . on 8 november 1990 the national power transmission corporation received its certificate for commencement of business . their name was subsequently changed to power grid corporation of india limited which took effect on october 23 1992 . powergrid started functioning on management basis with effect from august 1991 and subsequently it took over transmission assets from ntpc nhpc neepco nlc npc thdc sjvnl etc. in a phased manner and it commenced commercial operation in 1992 93 . in addition to this it also took over the operation of existing regional load despatch centers rldcs from central electricity authority cea in a phased manner from 1994 to 1996 which have been upgraded and modernized with state of the art unified load despatch and communication uldc schemes . consequently national load despatch centre nldc was established in 2009 for overall coordination at national level . according to its mandate the corporation apart from providing transmission system for evacuation of central sector power is also responsible for establishment and operation of regional and national power grids to facilitate transfer of power within and across the regions with reliability security and economy on sound commercial principles . based on its performance powergrid was recognized as a mini ratna category i public sector undertaking in october 1998 and conferred the status of navratna by the government of india in may 2008 . powergrid as the central transmission utility of the country is playing a major role in indian power sector and is also providing open access on its inter state transmission system . business edit powergrid operates throughout india . its transmission network consists of roughly 101 886 circuit kilometers and 197 ehvac and hvdc substations which provide total transformation capacity of 168 063 mva . powergrid s interregional capacity is 47 450 mw . examples of powergrid owned stations include the vizag back to back hvdc converter station the chandrapur back to back hvdc converter station the india sri lanka hvdc interconnection and the talcher kolar hvdc system . powergrid is listed on both the bse and the nse . as of 30 september 2010 there were 792 096 equity shareholders holders in powergrid . initially powergrid managed transmission assets owned by ntpc nhpc limited nhpc and north eastern electric power corporation limited . in january 1993 the power transmission systems act transferred ownership of the three power companies to powergrid . all employees of the three companies subsequently became powergrid employees . powertel edit powergrid s telecom company powertel operates a network of 29 279 kilometers and points of presence in 210 locations across india . transmission network failures edit main article 2012 india blackouts 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 . powergrid 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 powergrid substations . the northern region grid was brought back to normalcy to meet the demand of about 30 gw at 7 00 p.m. on 31 july 2012 the northern region grid collapsed a second time hours after the power supply had been restored to the northern region following the previous day s disruption . eastern transmission lines also failed disrupting power supply in delhi uttar pradesh haryana west bengal assam and punjab among other states . 2 after the power failures then power minister veerappa moily said that transmission grids would be independently audited in three months to ensure that the grids were fail safe . 3 utility factor of transmission lines edit many of the transmission lines are taken out of operation due to high voltage at receiving end . it is the cause for more than 90 % transmission line outages . 4 it indicates faulty transmission lines planning and poor demand factor or utilisation . see also edit india sri lanka hvdc interconnection talcher kolar hvdc system chandrapur back to back hvdc converter station vizag back to back hvdc converter station the electricity act 2003 electricity sector in india notes edit a b c http www.powergridindia.com layouts powergrid writereaddata file annuals nse annual results dt26052016.pdf powerless again northern eastern grids fail . 31 july 2012 . independent audit of grids in 3 months . 7 august 2012 . transmission elements outage report nrldc . also refer other rldc daily and weekly reports . 2014 . retrieved 1 january 2014 . external links edit power grid corporate web site grid maps of southern region v t e central public sector companies of india air india balmer lawrie bharat electronics bharat heavy electricals limited bharat petroleum bharat sanchar nigam bhavini cement corporation of india coal india limited dredging corporation of india limited electronics corporation of india limited food corporation of india gail hindustan aeronautics limited hmt limited india trade promotion organisation indian oil corporation indian rare earths limited life insurance corporation of india mazagon dock limited mecon limited mahanagar telephone nigam limited ntpc limited nuclear power corporation of india oil and natural gas corporation power grid corporation of india praga tools limited rashtriya ispat nigam rural electrification corporation limited state bank of india steel authority of india uranium corporation of india v t e cnx nifty companies of india acc ambuja cements asian paints axis bank bajaj auto bank of baroda bhel bpcl bharti airtel cairn india cipla coal india dlf dr. reddy s laboratories gail grasim industries hcl technologies hdfc hdfc bank hero motocorp hindalco industries hul infosys icici bank idfc indusind bank ltd. itc limited jindal steel and power kotak mahindra bank l & t lupin mahindra & mahindra maruti udyog nmdc ntpc ongc power grid corporation pnb reliance industries sesa sterlite limited sbi sun pharmaceutical tcs tata motors tata power tata steel tech mahindra ultratech cement wipro zee entertainment enterprises v t e public sector undertakings in india list maharatna bharat heavy electricals coal india gas authority of india indian oil corporation national thermal power corporation oil and natural gas corporation steel authority of india navratna bharat electronics bharat petroleum corporation container corporation of india engineers india hindustan aeronautics hindustan petroleum corporation mahanagar telephone nigam national aluminium company national buildings construction corporation national mineral development corporation neyveli lignite corporation oil india power finance corporation power grid corporation of india rashtriya ispat nigam rural electrification corporation shipping corporation of india miniratna i airports authority of india antrix corporation balmer lawrie bharat coking coal bharat dynamics bharat earth movers bharat sanchar nigam bridge & roof company india central warehousing corporation central coalfields chennai petroleum corporation cochin shipyard dredging corporation of india kamarajar port garden reach shipbuilders and engineers goa shipyard hindustan copper hindustan newsprint hindustan paper corporation hll lifecare housing and urban development corporation indian railway catering and tourism corporation indian rare earths indian renewable energy development agency ircon international india tourism development corporation india trade promotion organisation kudremukh iron ore company mazagaon dock mahanadi coalfields mangalore refinery and petrochemical mishra dhatu nigam metals and minerals trading corporation of india moil mstc national fertilizers national seeds corporation nathpa jhakri dam national hydroelectric power corporation north eastern electric power corporation northern coalfields numaligarh refinery oil and natural gas corporation pawan hans projects and development india rail vikas nigam railtel corporation of india rashtriya chemicals & fertilizers rites security printing and minting corporation of india south eastern coalfields state trading corporation of india telecommunications consultants india thdc india water and power consultancy services western coalfields miniratna ii bharat pumps & compressors broadcast engineering consultants india central mine planning and design institute central railside warehouse company educational consultants india engineering projects india ltd. fci aravali gypsum and minerals india ferro scrap nigam hmt international hscc india indian medicines and pharmaceuticals corporation mecon mineral exploration corporation national film development corporation of india national small industries corporation pec rajasthan electronics and instruments information updated as of 26 october 2014 by ministry of heavy industries and public enterprises india see also public sector banks in india retrieved from https en.wikipedia.org w index.php title power grid corporation of india & oldid 741922583 categories government owned companies of indiapublic sector in indiacompanies based in new delhicompanies established in 1992converter stationselectric power transmission infrastructure in indiaelectric power transmission system operators in indiacnx niftyministry of power india hidden categories use dmy dates from september 2013use indian english from june 2016all wikipedia articles written in indian englisharticles needing additional references from february 2013all articles needing additional references navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main 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