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{{Use dmy dates|date=July 2022}}
{{Use dmy dates|date=July 2022}}


Two severe [[power outage]]s affected most of [[North India|northern]] and [[East India|eastern India]] on 30 and 31 July 2012. The 30 July 2012 blackout affected over 400 million people and lasted about 1.5&nbsp;hrs. During that brief period, it was the largest power outage in history by number of people affected, beating the January 2001 blackout in [[Northern India]] (230 million affected).<ref>{{cite news| url=http://news.bbc.co.uk/2/hi/south_asia/1096957.stm | publisher=BBC News | title=Massive power cut hits India | date=2 January 2001 | access-date=18 March 2015}}</ref> Similar conditions caused a blackout on the next day, which remained the [[List of major power outages|largest power outage in history]] {{As of|2024|April|lc=y}}. The outage affected more than 620 million people (9% of the [[world population]] at the time<ref>{{cite web|url=https://www.theguardian.com/world/2012/jul/31/india-blackout-electricity-power-cuts|title=India blackouts leave 700 million without power|date=31 July 2012|author=Helen Pidd|access-date=31 July 2012|work=The Guardian}}</ref><ref>{{cite web|url=https://www.usatoday.com/news/world/story/2012-07-31/india-power-outage/56600520/1|author=Hriday Sarma and Ruby Russell|title=620 million without power in India after 3 power grids fail|date=31 July 2012|access-date=31 July 2012|work=USA Today}}</ref><ref>{{cite news|title=India's Mass Power Failure Worst Ever in World History |url=http://news.outlookindia.com/items.aspx?artid=770631 |work=Outlook |agency=Press Trust of India |date=1 August 2012 |access-date=1 August 2012 |url-status=dead |archive-url=https://web.archive.org/web/20120801052804/http://news.outlookindia.com/items.aspx?artid=770631 |archive-date=1 August 2012 }}</ref> and half of [[Demographics of India|India's population]]), spread across 22 states in [[north India|Northern]], [[east India|Eastern]], and [[Northeast India]].<ref name=DH /> An estimated 32&nbsp;[[gigawatts]] of generating capacity was taken offline.<ref name=TheHindu /> Of the affected population, 320 million initially had power, while the rest lacked direct access.<ref>{{cite web|title=How Many People Actually Lost Power?|url=https://blogs.wsj.com/indiarealtime/2012/08/01/how-many-people-actually-lost-power-in-india/|work=The Wall Street Journal|date=1 August 2012|author=Tripti Lahiri|access-date=5 August 2012}}</ref> Electric service was restored in the affected locations between 31 July and 1 August 2012.<ref>{{cite web|url=http://economictimes.indiatimes.com/news/news-by-industry/energy/power/power-grids-fail-power-restoration-complete-in-delhi-north-east-50-in-eastern-region/articleshow/15293178.cms|title=Power grids fail: Power restoration complete in Delhi & northeast, 50% in eastern region|date=31 July 2012|access-date=31 July 2012|work=The Economic Times}}</ref><ref name="powerrestored">{{cite web |url=https://www.nytimes.com/2012/08/02/world/asia/power-restored-after-india-blackout.html?_r=1&pagewanted=all|title=As Power Is Restored in India, the 'Blame Game' Over Blackouts Heats Up|author=Gardiner Harris and Vikas Bajaj|date=1 August 2012|access-date=2 August 2012|work=The New York Times}}</ref>
Two severe [[power outage]]s affected most of [[North India|northern]] and [[East India|eastern India]] on 30 and 31 July 2012. The 30 July 2012 blackout affected over 400 million people and lasted about 13.5&nbsp;hrs. During that brief period, it was the largest power outage in history by number of people affected, beating the January 2001 blackout in [[Northern India]] (230 million affected).<ref>{{cite news| url=http://news.bbc.co.uk/2/hi/south_asia/1096957.stm | publisher=BBC News | title=Massive power cut hits India | date=2 January 2001 | access-date=18 March 2015}}</ref> Similar conditions caused a blackout on the next day, which remained the [[List of major power outages|largest power outage in history]] {{As of|2024|April|lc=y}}. The outage affected more than 620 million people (9% of the [[world population]] at the time<ref>{{cite web|url=https://www.theguardian.com/world/2012/jul/31/india-blackout-electricity-power-cuts|title=India blackouts leave 700 million without power|date=31 July 2012|author=Helen Pidd|access-date=31 July 2012|work=The Guardian}}</ref><ref>{{cite web|url=https://www.usatoday.com/news/world/story/2012-07-31/india-power-outage/56600520/1|author=Hriday Sarma and Ruby Russell|title=620 million without power in India after 3 power grids fail|date=31 July 2012|access-date=31 July 2012|work=USA Today}}</ref><ref>{{cite news|title=India's Mass Power Failure Worst Ever in World History |url=http://news.outlookindia.com/items.aspx?artid=770631 |work=Outlook |agency=Press Trust of India |date=1 August 2012 |access-date=1 August 2012 |url-status=dead |archive-url=https://web.archive.org/web/20120801052804/http://news.outlookindia.com/items.aspx?artid=770631 |archive-date=1 August 2012 }}</ref> and half of [[Demographics of India|India's population]]), spread across 22 states in [[north India|Northern]], [[east India|Eastern]], and [[Northeast India]].<ref name=DH /> An estimated 32&nbsp;[[gigawatts]] of generating capacity was taken offline.<ref name="TheHindu">{{cite news |author=Sujay Mehuddia and Smriti Rak Ramachandaran |date=30 July 2012 |title=Worst outage cripples north India |url=http://www.thehindu.com/news/national/article3702075.ece?homepage=true |access-date=30 July 2012 |newspaper=[[The Hindu]]}}</ref> Of the affected population, 320 million initially had power, while the rest lacked direct access.<ref>{{cite web|title=How Many People Actually Lost Power?|url=https://blogs.wsj.com/indiarealtime/2012/08/01/how-many-people-actually-lost-power-in-india/|work=The Wall Street Journal|date=1 August 2012|author=Tripti Lahiri|access-date=5 August 2012}}</ref> Electric service was restored in the affected locations between 31 July and 1 August 2012.<ref>{{cite web|url=http://economictimes.indiatimes.com/news/news-by-industry/energy/power/power-grids-fail-power-restoration-complete-in-delhi-north-east-50-in-eastern-region/articleshow/15293178.cms|title=Power grids fail: Power restoration complete in Delhi & northeast, 50% in eastern region|date=31 July 2012|access-date=31 July 2012|work=The Economic Times}}</ref><ref name="powerrestored">{{cite web |url=https://www.nytimes.com/2012/08/02/world/asia/power-restored-after-india-blackout.html?_r=1&pagewanted=all|title=As Power Is Restored in India, the 'Blame Game' Over Blackouts Heats Up|author=Gardiner Harris and Vikas Bajaj|date=1 August 2012|access-date=2 August 2012|work=The New York Times}}</ref>


== Background ==
== Background ==
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The private sector had spent $29 billion to build their own independent power stations in order to provide reliable power to their factories, and the five biggest consumers of electricity in India had private off-grid supplies. In total, Indian companies had 35 GW of private off-grid generation capacity at the time of the blackouts and planned to add another 33 GW to their off-grid capacity in the aftermath.<ref name="B38">{{cite web |author=Rajesh Kumar Singh and Rakteem Katakey |date=3 August 2012 |title=Ambani, Tata 'Islands' Shrug Off Grid Collapse: Corporate India |url=https://www.bloomberg.com/news/2012-08-02/ambani-tata-islands-shrug-off-grid-collapse-corporate-india.html |access-date=6 August 2012 |publisher=Bloomberg}}</ref>
The private sector had spent $29 billion to build their own independent power stations in order to provide reliable power to their factories, and the five biggest consumers of electricity in India had private off-grid supplies. In total, Indian companies had 35 GW of private off-grid generation capacity at the time of the blackouts and planned to add another 33 GW to their off-grid capacity in the aftermath.<ref name="B38">{{cite web |author=Rajesh Kumar Singh and Rakteem Katakey |date=3 August 2012 |title=Ambani, Tata 'Islands' Shrug Off Grid Collapse: Corporate India |url=https://www.bloomberg.com/news/2012-08-02/ambani-tata-islands-shrug-off-grid-collapse-corporate-india.html |access-date=6 August 2012 |publisher=Bloomberg}}</ref>


Administratively, the Indian electrical power system is divided into Northern, Western (which, despite the name, is ''south'' of the Northern region), Southern, Eastern, and Northeastern regions. The Southern region only connects through [[high-voltage direct current]]&nbsp;(HVDC) interties, but the other four systems [[Wide area synchronous grid|operate in synchrony]].<ref name="nic.in" />{{Rp|page=5}} All operate at a nominal [[50 Hz|50&nbsp;Hz]].{{Cn|date=April 2024}} The Northern region also operates an internal HVDC line to transport power from generators in the east to consumers in the west.<ref name="nic.in" />{{Rp|page=5}}
Administratively, the Indian electrical power system is divided into [[Northern Region (Indian electrical grid)|Northern]], [[Western India|Western]] (which, despite the name, is ''south'' of the Northern region), [[Southern India|Southern]], [[Eastern India|Eastern]], and [[Northeast India|Northeastern regions]]. The Southern region only connects through [[high-voltage direct current]]&nbsp;(HVDC) interties, but the other four systems [[Wide area synchronous grid|operate in synchrony]].<ref name="nic.in" />{{Rp|page=5}} All operate at a nominal [[50 Hz|50&nbsp;Hz]].{{Cn|date=April 2024}} The Northern region also operates an internal HVDC line to transport power from generators in the east to consumers in the west.<ref name="nic.in" />{{Rp|page=5}}


On the days of the blackout, utilities had taken multiple [[Parallel circuit|parallel transmission lines]] out of service, leaving only a single 400 kV [[Bina Etawa|Bina]]-[[Gwalior]] line connecting the Western and Northern regions of the grid. There was also unusually large electrical demand.<ref name="nic.in" />{{Rp|pages=iv-v}}
On the days of the blackout, utilities had taken multiple [[Parallel circuit|parallel transmission lines]] out of service for scheduled maintenance, and only a single 400 kV [[Bina Etawa|Bina]]-[[Gwalior]] line connected the Western and Northern regions of the grid.<ref name="nic.in" />{{Rp|pages=iv-v}} However, there was also unusually large electrical demand, and the Northern Region imported 4-6&nbsp;GW of power from its neighbors.<ref name="TheHindu" /><ref name="nic.in" />{{Rp|pages=iv-v,8,21}}


== Sequence of events ==
== Sequence of events ==


=== 30 July ===
=== 30 July ===
In addition to the transmission lines under maintenance, multiple interties between the Western and Northern regions [[Short circuit|tripped]] out of service on the evening preceding the blackout, leaving only the 400 kV [[Bina Etawa|Bina]]-[[Gwalior]] line connecting the Western and Northern regions. The line was [[Surge impedance loading|sized to transfer]] about 700&nbsp;MW power with optimum efficiency, but could carry substantially more without damage, and at the time of the blackout carried about 1450&nbsp;MW. The Northern and Western Regions' [[Load Despatch Centre|Load Despatch Centres]] requested that the Northern region [[Load shedding|shed load]] and the Western region reduce generation to unload the power line, but neither utility failed to do so adequately.<ref name="nic.in" />{{Rp|pages=9-10}}
At 02:35 [[Indian Standard Time|IST]] (21:05 [[Coordinated Universal Time|UTC]] on 29 July), [[circuit breaker]]s on the 400 kV [[Bina Etawa|Bina]]-[[Gwalior]] line tripped. As this line fed into the [[Agra]]-[[Bareilly]] [[Electric power transmission|transmission section]], breakers at the station also tripped, and power failures cascaded through the grid. All major power stations were shut down in the affected states, causing an estimated shortage of 32 GW.<ref name=TheHindu/> Officials described the failure as "''the worst in a decade''".<ref name="NYT">{{cite web |url=http://india.blogs.nytimes.com/2012/07/30/power-restored-to-most-of-north-india/ |title=Power Restored to Most of north India |author=Sruthi Gottipatti and Niharika Mandhana |date=30 July 2012 |work=The New York Times |access-date=30 July 2012}}</ref>


At 02:35 [[Ante Meridiam|a.m.]] [[Indian Standard Time|IST]] (21:05 [[Coordinated Universal Time|UTC]] on 29 July), the high load on the Bina-Gwalior line tripped the line's [[circuit breaker]]s.<ref name="TheHindu" /><ref name="nic.in" />{{Rp|page=11}} Power flowing from the Western region to the Northern region now had to circle through the Eastern region, and [[Transmission loss (electric power)|transmission losses]] from the new routing left the Northern region undersupplied. Consequently, it began to [[Underfrequency|lose frequency]], and circuit breakers on the Northern-Eastern transmission lines acted to separate the now-out-of-sync grids. Although the Northern region had incorporated underfrequency load shedding devices adequate to compensate for the missing imported power, the scheme failed to perform as designed and the Northern grid collapsed.<ref name="TheHindu" /><ref name="nic.in" />{{Rp|pages=11-12}} All major power stations were shut down in the affected states, causing an estimated shortage of 32 GW.<ref name="TheHindu" />
On the day of the collapse, [[Ministry of Power (India)|Power Minister]] [[Sushilkumar Shinde]] stated that the exact cause of the failure was unknown, but that at the time of the failure, electricity use was "''above normal''". He speculated that some states had attempted to draw more power than permitted due to the higher consumption. Spokesperson for [[PowerGrid Corporation of India|PowerGrid Corporation of India Limited]] (PGCIL) and the Northern Regional Load Dispatch Centre (NRLDC) stated that [[Uttar Pradesh]], [[Punjab, India|Punjab]] and [[Haryana]] were the states responsible for the overdraw. PGCIL's chairman also stated that electrical service was restored "at a record time".<ref name="TheHindu">{{cite news |url=http://www.thehindu.com/news/national/article3702075.ece?homepage=true |title=Worst outage cripples north India |author=Sujay Mehuddia and Smriti Rak Ramachandaran |date=30 July 2012 |newspaper=[[The Hindu]] |access-date=30 July 2012}}</ref>


A senior director for an Indian power company described the outage as ''"a fairly large breakdown that exposed major technical faults in India's grid system. Something went terribly wrong which caused the backup safety systems to fail."''<ref name=WP/>
Officials described the failure as "the worst in a decade",<ref name="NYT">{{cite web |url=http://india.blogs.nytimes.com/2012/07/30/power-restored-to-most-of-north-india/ |title=Power Restored to Most of north India |author=Sruthi Gottipatti and Niharika Mandhana |date=30 July 2012 |work=The New York Times |access-date=30 July 2012}}</ref> and a power company director noted that the "fairly large breakdown...exposed major technical faults in India's grid system. Something went terribly wrong which caused the backup safety systems to fail."<ref name="WP" />


More than 300 million people, about 25% of India's population, were without power. [[Indian Railways|Railways]] and some airports were shut down until 08:00.<ref name="BBC">{{cite web |url=https://www.bbc.co.uk/news/world-asia-india-19043972 |title=Power cut causes major disruption in northern India |date=30 July 2012 |publisher=BBC News |access-date=30 July 2012}}</ref> The busiest airport in South Asia, [[Delhi Airport]], continued functioning because it switched to back-up power in 15 seconds.<ref name=WP/><ref name=B38/> The outage caused "chaos" for Monday morning rush hour, as passenger trains were shut down and traffic signals were non-operational.<ref name=TheHindu/> Trains stalled for three to five hours.<ref name=BBC/> Several hospitals reported interruptions in health services,<ref name=TheHindu/> while others relied on back-up generators.<ref name=NYT/> Water treatment plants were shut down for several hours,<ref name=BBC/> and hundreds of thousands of people were unable to draw water from wells powered by electric pumps.<ref name="HT">{{cite web|url=http://www.hindustantimes.com/India-news/NewDelhi/Power-grid-failure-FAQs/Article1-905428.aspx |title=Power grid failure: FAQs |date=31 July 2012 |work=Hindustan Times |access-date=31 July 2012 |url-status=dead |archive-url=https://web.archive.org/web/20120730213932/http://www.hindustantimes.com/India-news/NewDelhi/Power-grid-failure-FAQs/Article1-905428.aspx |archive-date=30 July 2012 }}</ref>
More than 300 million people, about 25% of India's population, were without power. The Associated Chambers of Commerce and Industry of India ([[ASSOCHAM]]) stated that the blackout had "''severely impacted''" businesses, leaving many unable to operate.<ref>{{cite web |date=31 July 2012 |title=When the lights went out |url=http://www.hindustantimes.com/India-news/NewDelhi/Power-failure-in-7-states-no-Metro-Trains-in-Delhi-today/Article1-904035.aspx |url-status=dead |archive-url=https://web.archive.org/web/20120730105408/http://www.hindustantimes.com/India-news/NewDelhi/Power-failure-in-7-states-no-Metro-Trains-in-Delhi-today/Article1-904035.aspx |archive-date=30 July 2012 |access-date=31 July 2012 |work=Hindustan Times}}</ref> [[Indian Railways|Railways]] and some airports were shut down until 08:00,<ref name="BBC">{{cite web |url=https://www.bbc.co.uk/news/world-asia-india-19043972 |title=Power cut causes major disruption in northern India |date=30 July 2012 |publisher=BBC News |access-date=30 July 2012}}</ref> although the busiest airport in South Asia, [[Delhi Airport]], continued functioning on [[backup power]].<ref name=WP/><ref name=B38/> The outage caused "chaos" for Monday morning rush hour, as passenger trains were shut down and traffic signals were non-operational.<ref name=TheHindu/> Trains stalled for three to five hours.<ref name=BBC/> Several hospitals reported interruptions in health services,<ref name=TheHindu/> while others relied on back-up generators.<ref name=NYT/> Water treatment plants were shut down for several hours,<ref name=BBC/> and hundreds of thousands of people were unable to draw water from wells powered by electric pumps.<ref name="HT">{{cite web|url=http://www.hindustantimes.com/India-news/NewDelhi/Power-grid-failure-FAQs/Article1-905428.aspx |title=Power grid failure: FAQs |date=31 July 2012 |work=Hindustan Times |access-date=31 July 2012 |url-status=dead |archive-url=https://web.archive.org/web/20120730213932/http://www.hindustantimes.com/India-news/NewDelhi/Power-grid-failure-FAQs/Article1-905428.aspx |archive-date=30 July 2012 }}</ref>


[[Power Grid Corporation of India]]'s chairman stated that electrical service was restored "at a record time".<ref name="TheHindu" />
The Associated Chambers of Commerce and Industry of India ([[ASSOCHAM]]) stated that the blackout had "''severely impacted''" businesses, leaving many unable to operate.<ref>{{cite web|url=http://www.hindustantimes.com/India-news/NewDelhi/Power-failure-in-7-states-no-Metro-Trains-in-Delhi-today/Article1-904035.aspx |title=When the lights went out |date=31 July 2012 |work=Hindustan Times |access-date=31 July 2012 |url-status=dead |archive-url=https://web.archive.org/web/20120730105408/http://www.hindustantimes.com/India-news/NewDelhi/Power-failure-in-7-states-no-Metro-Trains-in-Delhi-today/Article1-904035.aspx |archive-date=30 July 2012 }}</ref> Oil refineries in [[Panipat]], [[Mathura]] and [[Bathinda]] continued operating because they have their own captive power stations within the refineries and do not depend on the grid.<ref name=TheHindu/>

Oil refineries in [[Panipat]], [[Mathura]] and [[Bathinda]] continued operating because they have their own captive power stations within the refineries and do not depend on the grid.<ref name="TheHindu" />


It took 15 hours to restore 80% of service.<ref name=WP/>
It took 15 hours to restore 80% of service.<ref name=WP/>
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The committee also offered a number of recommendations to prevent further failures, including an audit of the protection systems.
The committee also offered a number of recommendations to prevent further failures, including an audit of the protection systems.

In their report, the committee noticed that power stations may have had adequate generation capacity to avoid the July 30 blackout, but their [[Governor (mechanics)|governors]] had not been set aggressively enough.<ref name="nic.in" />{{Rp|page=12}}


== See also ==
== See also ==

Revision as of 01:04, 23 April 2024

Two severe power outages affected most of northern and eastern India on 30 and 31 July 2012. The 30 July 2012 blackout affected over 400 million people and lasted about 13.5 hrs. During that brief period, it was the largest power outage in history by number of people affected, beating the January 2001 blackout in Northern India (230 million affected).[1] Similar conditions caused a blackout on the next day, which remained the largest power outage in history as of April 2024. The outage affected more than 620 million people (9% of the world population at the time[2][3][4] and half of India's population), spread across 22 states in Northern, Eastern, and Northeast India.[5] An estimated 32 gigawatts of generating capacity was taken offline.[6] Of the affected population, 320 million initially had power, while the rest lacked direct access.[7] Electric service was restored in the affected locations between 31 July and 1 August 2012.[8][9]

Background

India is the world's third largest producer and consumer of electricity after the United States and China; but has long suffered from unreliable electrical infrastructure.[10][11] The northern electrical grid had previously collapsed as recently as 2001.[6] Around the time of the blackouts, an estimated 27% of energy generated was lost in transmission or stolen.[12] About 25% of the population, about 300 million people, had no electricity at all.[12] Peak supply fell short of demand by an average of 9%, and the nation suffered from frequent power outages that lasted as long as 10 hours.[12] Efforts were underway (and continue) to reduce transmission and distribution losses, and increase production.[13]

The private sector had spent $29 billion to build their own independent power stations in order to provide reliable power to their factories, and the five biggest consumers of electricity in India had private off-grid supplies. In total, Indian companies had 35 GW of private off-grid generation capacity at the time of the blackouts and planned to add another 33 GW to their off-grid capacity in the aftermath.[14]

Administratively, the Indian electrical power system is divided into Northern, Western (which, despite the name, is south of the Northern region), Southern, Eastern, and Northeastern regions. The Southern region only connects through high-voltage direct current (HVDC) interties, but the other four systems operate in synchrony.[15]: 5  All operate at a nominal 50 Hz.[citation needed] The Northern region also operates an internal HVDC line to transport power from generators in the east to consumers in the west.[15]: 5 

On the days of the blackout, utilities had taken multiple parallel transmission lines out of service for scheduled maintenance, and only a single 400 kV Bina-Gwalior line connected the Western and Northern regions of the grid.[15]: iv–v  However, there was also unusually large electrical demand, and the Northern Region imported 4-6 GW of power from its neighbors.[6][15]: iv–v, 8, 21 

Sequence of events

30 July

In addition to the transmission lines under maintenance, multiple interties between the Western and Northern regions tripped out of service on the evening preceding the blackout, leaving only the 400 kV Bina-Gwalior line connecting the Western and Northern regions. The line was sized to transfer about 700 MW power with optimum efficiency, but could carry substantially more without damage, and at the time of the blackout carried about 1450 MW. The Northern and Western Regions' Load Despatch Centres requested that the Northern region shed load and the Western region reduce generation to unload the power line, but neither utility failed to do so adequately.[15]: 9–10 

At 02:35 a.m. IST (21:05 UTC on 29 July), the high load on the Bina-Gwalior line tripped the line's circuit breakers.[6][15]: 11  Power flowing from the Western region to the Northern region now had to circle through the Eastern region, and transmission losses from the new routing left the Northern region undersupplied. Consequently, it began to lose frequency, and circuit breakers on the Northern-Eastern transmission lines acted to separate the now-out-of-sync grids. Although the Northern region had incorporated underfrequency load shedding devices adequate to compensate for the missing imported power, the scheme failed to perform as designed and the Northern grid collapsed.[6][15]: 11–12  All major power stations were shut down in the affected states, causing an estimated shortage of 32 GW.[6]

Officials described the failure as "the worst in a decade",[16] and a power company director noted that the "fairly large breakdown...exposed major technical faults in India's grid system. Something went terribly wrong which caused the backup safety systems to fail."[17]

More than 300 million people, about 25% of India's population, were without power. The Associated Chambers of Commerce and Industry of India (ASSOCHAM) stated that the blackout had "severely impacted" businesses, leaving many unable to operate.[18] Railways and some airports were shut down until 08:00,[19] although the busiest airport in South Asia, Delhi Airport, continued functioning on backup power.[17][14] The outage caused "chaos" for Monday morning rush hour, as passenger trains were shut down and traffic signals were non-operational.[6] Trains stalled for three to five hours.[19] Several hospitals reported interruptions in health services,[6] while others relied on back-up generators.[16] Water treatment plants were shut down for several hours,[19] and hundreds of thousands of people were unable to draw water from wells powered by electric pumps.[20]

Power Grid Corporation of India's chairman stated that electrical service was restored "at a record time".[6]

Oil refineries in Panipat, Mathura and Bathinda continued operating because they have their own captive power stations within the refineries and do not depend on the grid.[6]

It took 15 hours to restore 80% of service.[17]

31 July

The system failed again at 13:02 IST (07:32 UTC), due to a relay problem near the Taj Mahal.[21] As a result, power stations across the affected parts of India again went offline. NTPC Ltd. stopped 38% of its generation capacity.[22] Over 60 crore (600 million) people (nearly half of India's population), in 22 out of 28 states in India, were without power.[5]

More than 300 intercity passenger trains and commuter lines were shut down as a result of the power outage.[23][24] The worst affected zones in the wake of the power grid's collapse were Northern, North Central, East Central, and East Coast railway zones, with parts of Eastern, South Eastern and West Central railway zones. The Delhi Metro suspended service on all six lines, and had to evacuate passengers from trains that stopped mid-journey, helped by the Delhi Disaster Management Authority.[22]

About 200 miners were trapped underground in eastern India due to lifts failing, but officials later said they had all been rescued.[25]

The National Disaster Management Authority (NDMA), not normally mandated to investigate blackouts, began to do so because of the threat to basic infrastructure facilities like railways, metro rail system, lifts in multi-storey buildings, and movement of vehicular traffic.[26][27]

The following states were affected by the grid failure:[28]

The following regions were not directly affected by the power outage:[29]

  • Narora, Renukoot and Simbhaoli in Uttar Pradesh
  • parts of Delhi such as Badarpur
  • areas served by Sterlite and Ib Thermal Power Station (most of western Odisha)
  • most of the Kolkata municipal area (CESC system)

As of 2 August, Uttar Pradesh was being supplied about 7 GW power, while the demand was between 9 and 9.7 GW.[30]

Reactions

On the day of the collapse, Power Minister Sushilkumar Shinde ordered a three-member panel to determine the reason for the failure and report on it in fifteen days.[31] In response to criticism, he observed that India was not alone in suffering major power outages, as blackouts had also occurred in the United States and Brazil within the previous few years.[32]

Washington Post described the failure as adding urgency to Indian Prime Minister Dr. Manmohan Singh's plan for a US$400 billion overhaul of India's power grid. His plan calls for a further 76 gigawatts of generation by 2017,[17] produced in part by nuclear power.

Rajiv Kumar, secretary general of the Federation of Indian Chambers of Commerce and Industry (FICCI) said, "One of the major reasons for the collapse of the power grid is the major gap between demand and supply. There is an urgent need to reform the power sector and bring about infrastructural improvements to meet the new challenges of the growing economy."[33]

On 1 August 2012, newly appointed Power Minister Veerappa Moily stated, "First thing is to stabilize the grid and it has to sustain. For that we will work out a proper strategy." He declined to blame specific states, saying, "I don't want to start with the blame game."[34]

Team Anna, the supporters of anti-corruption activist Anna Hazare, charged that this grid failure was a conspiracy to suppress the indefinite fast movement started on 25 July 2012 for the Jan Lokpal Bill and targeting Sharad Pawar.[35][36]

Some technology sources and United States Agency for International Development (USAID) proposed that another widespread outage could be prevented by integrated network of microgrids and distributed generation connected seamlessly with the main grid via a superior smart grid technology, which includes automated fault detection, islanding and self-healing of the network.[37][38][39][40]

Investigation

The three-member investigation committee consisted of S. C. Shrivastava, A. Velayutham and A. S. Bakshi, and issued its report on 16 August 2012. It concluded that four factors were responsible for the two days of blackout:[15]

  • Weak inter-regional power transmission corridors due to multiple existing outages (both scheduled and forced);
  • High loading on 400 kV Bina–Gwalior–Agra link;
  • Inadequate response by State Load Dispatch Centers (SLDCs) to the instructions of Regional Load Dispatch Centres (RLDCs) to reduce over-drawal by the Northern Region utilities and under-drawal/excess generation by the Western Region utilities;
  • Loss of 400 kV Bina–Gwalior link due to mis-operation of its protection system.

The committee also offered a number of recommendations to prevent further failures, including an audit of the protection systems.

In their report, the committee noticed that power stations may have had adequate generation capacity to avoid the July 30 blackout, but their governors had not been set aggressively enough.[15]: 12 

See also

References

  1. ^ "Massive power cut hits India". BBC News. 2 January 2001. Retrieved 18 March 2015.
  2. ^ Helen Pidd (31 July 2012). "India blackouts leave 700 million without power". The Guardian. Retrieved 31 July 2012.
  3. ^ Hriday Sarma and Ruby Russell (31 July 2012). "620 million without power in India after 3 power grids fail". USA Today. Retrieved 31 July 2012.
  4. ^ "India's Mass Power Failure Worst Ever in World History". Outlook. Press Trust of India. 1 August 2012. Archived from the original on 1 August 2012. Retrieved 1 August 2012.
  5. ^ a b "Power crisis now trips 22 states, 600 million people hit". Deccan Herald. 31 July 2012. Retrieved 31 July 2012.
  6. ^ a b c d e f g h i j Sujay Mehuddia and Smriti Rak Ramachandaran (30 July 2012). "Worst outage cripples north India". The Hindu. Retrieved 30 July 2012.
  7. ^ Tripti Lahiri (1 August 2012). "How Many People Actually Lost Power?". The Wall Street Journal. Retrieved 5 August 2012.
  8. ^ "Power grids fail: Power restoration complete in Delhi & northeast, 50% in eastern region". The Economic Times. 31 July 2012. Retrieved 31 July 2012.
  9. ^ Gardiner Harris and Vikas Bajaj (1 August 2012). "As Power Is Restored in India, the 'Blame Game' Over Blackouts Heats Up". The New York Times. Retrieved 2 August 2012.
  10. ^ "How businesses pay for India's unreliable power system". SME Mentor. Associated Press. 2 August 2012. Archived from the original on 1 February 2014. Retrieved 3 August 2012.
  11. ^ "Indian Businesses Weather Blackouts, but at a Cost". United States: ABC News. Associated Press. 1 August 2012. Retrieved 3 August 2012.[permanent dead link‍]
  12. ^ a b c Rajesh Kumar Singh and Rakteem Katakey (1 August 2012). "Worst India Outage Highlights 60 Years of Missed Targets". Bloomberg. Retrieved 2 August 2012.
  13. ^ Express News Service (26 July 2013). "Address power transmission and distribution losses". Archived from the original on 31 July 2013.
  14. ^ a b Rajesh Kumar Singh and Rakteem Katakey (3 August 2012). "Ambani, Tata 'Islands' Shrug Off Grid Collapse: Corporate India". Bloomberg. Retrieved 6 August 2012.
  15. ^ a b c d e f g h i "Report of the Enquiry Committee on Grid Disturbance in Northern Region on 30th July 2012 and in Northern, Eastern & North-Eastern Region on 31st July 2012" (PDF). powermin.nic.in. 16 August 2012. Archived from the original (PDF) on 2 November 2012. Retrieved 28 August 2012.
  16. ^ a b Sruthi Gottipatti and Niharika Mandhana (30 July 2012). "Power Restored to Most of north India". The New York Times. Retrieved 30 July 2012.
  17. ^ a b c d Kartikay Mehrotra and Andrew MacAskill (31 July 2012). "Singh's $400 Billion Power Plan Gains Urgency as Grid Collapses". The Washington Post. Archived from the original on 5 August 2012. Retrieved 31 July 2012.
  18. ^ "When the lights went out". Hindustan Times. 31 July 2012. Archived from the original on 30 July 2012. Retrieved 31 July 2012.
  19. ^ a b c "Power cut causes major disruption in northern India". BBC News. 30 July 2012. Retrieved 30 July 2012.
  20. ^ "Power grid failure: FAQs". Hindustan Times. 31 July 2012. Archived from the original on 30 July 2012. Retrieved 31 July 2012.
  21. ^ Gardiner Harris and Heather Timmons (31 July 2012). "Half of India Crippled by Second Day of Power Failures". The New York Times. Retrieved 31 July 2012.
  22. ^ a b Kartikay Mehrotra and Rakteem Katakey (31 July 2012). "India Blacks Out From New Delhi to Kolkata as Grid Fails Again". Bloomberg L.P. Retrieved 31 July 2012.
  23. ^ Saurabh Chaturvedi and Santanu Choudhury (31 July 2012). "India's Power Grid Collapses Again". The Wall Street Journal. Retrieved 31 July 2012.
  24. ^ "Multiple grid collapses hit train services again". First Post. Press Trust of India. 31 July 2012. Retrieved 31 July 2012.
  25. ^ "Hundreds of millions without power in India". BBC News. 31 July 2012. Retrieved 31 July 2012.
  26. ^ Vishwa Moham (31 July 2012). "Blackout expands NDMA's scope". The Times of India. Retrieved 31 July 2012.
  27. ^ "Power supply partially restored; Modi attacks PM". First Post. 31 July 2012. Retrieved 1 August 2012.
  28. ^ "India faces worst blackout as grids collapse hits 20 states, 60 crore people". IBN. 31 July 2012. Archived from the original on 2 August 2012. Retrieved 31 July 2012.
  29. ^ "Preliminary report on grid disturbance in NEW grid on 31st July 2012" (PDF). National Load Dispatch Centre. 31 July 2012. Retrieved 1 August 2012.[permanent dead link‍]
  30. ^ "Northern power grid was again on verge of tripping". Hindustan Times. Indo-Asian News Service. 4 August 2012. Archived from the original on 4 August 2012. Retrieved 5 August 2012.
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  32. ^ "Power grid failure makes 370M swelter in dark as India struggles to meet its vast energy needs". The Washington Post. Associated Press. 30 July 2012. Archived from the original on 22 February 2019. Retrieved 31 July 2012.
  33. ^ Simon Denyer and Rama Lakshmi (31 July 2012). "India blackout, on second day, leaves 600 million without power". The Washington Post. Retrieved 31 July 2012.
  34. ^ "Don't want to start with blame game: Veerappa Moily". IBN. 1 August 2012. Archived from the original on 10 August 2014. Retrieved 30 July 2012.
  35. ^ "Team Anna calls grid failure a conspiracy, targets Pawar". IBN. 30 July 2012. Archived from the original on 1 August 2012. Retrieved 2 August 2012.
  36. ^ "Team Anna sees conspiracy in northern power grid collapse". The Economic Times. Press Trust of India. 30 July 2012. Retrieved 2 August 2012.
  37. ^ "Power crisis and grid collapse: Is it time to think different, small and local?". SME Mentor. 3 August 2012. Archived from the original on 8 August 2014. Retrieved 6 August 2012.
  38. ^ Kevin Bullis (31 July 2012). "How Power Outages in India May One Day Be Avoided". technologyreview.com. Retrieved 9 August 2012.
  39. ^ "The smart grid vision for India's power sector" (PDF). USAID India. March 2010. Archived from the original (PDF) on 16 June 2012. Retrieved 9 August 2012.
  40. ^ "Enabling integrated network of microgrids and distributed power connected to the grid via Smart Grid technology with self-healing". Retrieved 10 August 2012.
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