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Mumbai power cut [UPDATES]: ‘Power supply restored substantially …

Mumbai: Large parts of Mumbai and the Mumbai Metropolitan Region of Thane, Raigad and Palghar witnessed a major power cut on Monday morning due to grid failure.
As per Maharashtra Energy Minister Nitin Raut, some regular maintenance work was going on at the 400KV lines at Kalwa, Thane. “All the load had been shifted to the other circuit, which faced some technical issues and broke down, hitting power supply to large parts of Mumbai-Thane. Work is underway on a warfooting to restore power,” said Raut in a statement.
Within almost 15 minutes of the fault, ‘#powercut’ started trending on Twitter. Traffic signals on the roads stopped working, water supply schedules were hit, lifts got stuck in some buildings, among others, due to power outage.
The lifelines of Mumbai, i.e. Central Railway and Western Railway, were hit too. Commuters, who were stranded due to sudden electricity failure, jumped down at many locations and began walking down to the nearest suburban railway station.
However, things have begun going back to normal. Here are the updates:
• Tata Power has issued a fresh statement on the Mumbai power outage: “Based on the preliminary assessment of the situation, Tata Power would like to inform that today many parts of Mumbai experienced an unforeseen electricity failure starting at 10 am in the morning due to tripping of MSETCL’s 400 KV transmission system at Kalwa which supplies to Mumbai and adjoining areas. MSETCLs 400kV Pune-Kalwa line was under forced shutdown since yesterday due to R-Y phase fault. It is understood that MSETCL had taken emergency shutdown for 400 KV Kalwa-Padghe line-1 at 6.54 hrs today morning to attend fault and was expected to be revived by 09:30 hrs, but could not revive it. As understood, at 09:58 hrs 400kV Kalwa-Padghe-2 carrying 633 MW tripped. The flow on Pune-Kharghar rose upto 900MW and tripped at 10:00 hrs resulting in load drop in Mumbai system. “Mumbai’s islanding system that saves the city from major power outages was separated, however it could not hold as additional 900MW load dropped at 10:05 hrs. Tata Power swiftly began restoration work to bring back supply from the 3 Hydro units and Trombay gas and coal units as soon as the MSETCL transmission lines were connected. Tata Power started restoring supply to its consumers progressively from 12 noon onwards. Tata Power regrets the inconvenience caused to its consumers due to this unforeseen event in power failure due to the transmission system failure leading to the cascading impact to all downstream suppliers of electricity including Tata Power, BEST and its consumers.”
• Adani Electricity has, meanwhile, tweeted: “The AEML system experienced grid disturbance due to a fault outside of it. Islanding of Dahanu saved the essential supplies. The rest of the supplies are being restored as grid inputs get available from the Maha system. Please bear with us as we await the Maha grid restoration.”
• The power supply (in Mumbai) has been restored substantially. Out of 2000 MW which went off, about 1900 MW has been restored, the remaining will be restored soon. The national grid is fine, the problem happened in some parts of the state grid: Union Power Minister RK Singh
• Taking serious cognisance, Maharashtra Chief Minister Uddhav Thackeray has ordered an immediate probe into power outage in the Mumbai Metropolitan Region (MMR). He further directed the state chief secretary to ensure that the control rooms and fire brigades are alert to see there are no other mishaps due to power cut.
• Power supply to railways has been restored. Power to other emergency services like hospitals is also being restored: Maharashtra Power Minister Nitin Raut
• As the power supply is restored in Western Railway’s Mumbai suburban section, all overhead equipments (OHE) have been charged at 12.20 hours and Western Railway’s suburban train services are restored – Sumit Thakur, CPRO, Western Railways
• Trains between CSMT-Panvel on Harbour Line have resumed. We’re trying to restore services between CSMT-Kalyan, CSMT-Karjat/Kasara. Long-distance trains from Mumbai rescheduled, and incoming trains regulated at interchange points – CPRO, Central Railway
• The BMC has said in an update that power supply has been restored at Municipal Head Office, A ward , B ward, C Ward, D ward, H/W ward, R/C, S ward, K/E & K/W ward. Further, services have been restored on Western, Central and Harbour Railway lines as of 12:26 hours.
• BMC has tweeted to inform that it was monitoring the situation in hospitals amid the power outage. “Dear Mumbaikars, BMC is personally & closely monitoring the status at all private & government hospitals, to ensure that their services continue unhindered, even in the dearth of power supply. No untoward incident has been reported so far.”
• Maharashtra Energy Minister Nitin Raut has explained how the power outage in Mumbai happened: “Repair and maintenance work was underway at Circuit 1 of 400 KV GIS centre and the entire load was put on Circuit 2. A sudden technical failure in Circuit 2 resulted in power supply being affected in most parts of Mumbai and Thane.”
• Maharashtra CM Uddhav Thackeray has spoken to State Power Minister Nitin Raut and the BMC Commissioner over grid failure in Mumbai and gave directions for its restoration as soon as possible, the CMO said.
• “The Bombay Stock Exchange is functioning normal. The listing ceremony was concluded successfully for Mazagon Shipbuilders this morning,” a BSE Spokesperson told news agency IANS.
• News agency PTI has mentioned a source as saying that power supply in Mumbai will be fully restored in an hour. The source added that power outage in the financial capital was chiefly due to a failure in the state grid. Notably, Mumbai is supplied electricity under islanding system – the system in which an area is supplied electricity in such a manner that it is insulated from any grid failure or other technical issues occurring outside that. The source further said that Power System Operation Corporation Limited (POSOCO) has already charged up various electricity supply lines of Mumbai and its suburbs. The Power Grid Corporation Ltd has no role to play in the power outage being witnessed by the city today as its main inter-state transmission lines were working perfectly, added the source.
• “Due to Grid failure at Padgha – Kalwa there is total failure of electricity in Mumbai. The restoration work is in progress,” tweeted BEST Electricity.
• The BMC has tweeted emergency numbers. “Due to power supply failure in Mumbai region, residents of Mumbai are requested to call on 022-22694727, 022-226947725 and 022-22704403 in case of emergencies,” read the BMC tweet.
• The Central Railway Harbour Line services were restored at 10.55 am. “Engineers are in constant touch with Grid experts. We will update about mainline soon,” tweeted the CR, urging people to not panic. “Please don’t walk on track,” added the tweet.
• In a statement, Tata Power has said that at 10:10 am, “there were simultaneous substation tripping in MSETCL’s Kalwa, Kharghar causing a huge dip in frequency in Mumbai transmission system which led to tripping of power supply. Restoration work in progress to bring supply from the 3 Hydro units & Trombay units.”
• Bollywood megastar Amitabh Bachchan urged people to stay clam. “Entire city in power outage .. somehow managing this message .. keep calm all shall be well ..”
• Brihanmumbai Municipal Corporation (BMC) commissioner Iqbal Singh Chahal has urged hospitals to keep diesel generator sets ready. “All the hospitals to contact their respective SWM transport GARAGE officers to get enough supply of diesel for at least eight hours so that there is no power failures in hospitals especially ICUs. In case of any issues please contact disaster control room for help. CE SWM to coordinate this. Disaster control and CE M&E To keep stand bye private MOBILE DG SET vehicles handy within next one hour in case power failure continues beyond two hours. Please report to Shri. Narvekar or smt. Sangita Lokhande at DM Control about this every half an hour.”
• The Brihanmumbai Electricity Supply and Transport (BEST) informed that the power outage in the financial capital is due to the failure of TATA’s incoming electric supply. “Inconveniences is regretted,” the tweet read further.
• In the meantime, Adani Electricity tweeted: “There is a major power grid failure due to which supply is affected in most areas of mumbai. As per grid safety protocols, Adani Power System has been able to sustain and islanded.”
“AEML is currently supplying to critical services in Mumbai Around 385MW through AEML Dahanu generation. Our teams are working to restore the supply in the affected areas at the earliest. We regret the inconvenience caused,” said Adani Electricity in another tweet.
• Government sources suggest, there is multiple tripping of lines and transformer (Kalwa-Padghe and Khargar ICTs) which was supplying power to Mumbai system. Reports suggested a 400 KV line has tripped.
• Meanwhile, trains running on Churchgate-Borivali section have been shut. The Western Railway has urged commuters not to panic and maintain social distancing.
• In the meantime, Central Railway tweeted: “Mumbai Suburban trains on CR held up due to grid failure. We will update ASAP. Kindly bear with us.” At present, suburban local train services are operating only for essential workers.
• Entire Maharashtra Industrial Development Corporation (MIDC), Palghar, Dahanu lines have been affected. It will take one hour to restore the supply, as per EHV Power team.
• Notably, multiple operators, including the state-run BEST, Tata Power, Adani Electricity supply power to Mumbai. Read from source….