“Even if the islanding systems had been activated by an electrician in Mumbai, it would have been impossible to meet the electrical needs of Mumbai. The city’s current power demand is 2400MW due to the Covid-19 pandemic. However, it can reach 3200MW at times so islanding would not have been possible. The islanding system would have provided an additional 800-1600MW of power.
Why did the city’s islanding system to provide uninterrupted electricity go down?
Motorcyclists pass the Chhatrapati Shivaji Terminus railway station (CST), an electrician in mumbai. India’s financial capital experienced its worst power outage for decades due to a grid fault. This disrupted transport networks and impacted trading volumes in equities as well as bond markets. (Bloomberg)
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Mumbai’s power outage: Why did Mumbai’s islanding system that provides uninterrupted electricity go down?
Nitin Raut, energy minister, said that islanding was not possible due to grid failures at multiple centers.
Hindustan Times, electrician in mumbai | By Surendra P Gangan
UPDATED OCT 13, 2020, 06:11 AM IST
The four-decade-old islanding system was supposed to provide uninterrupted electricity supply to the city. But it failed to function on Monday, when the power grid went down.
The islanding system was developed by Tata Power in 1981 as a way to manage disturbance. It is intended to ensure that power systems at Adani and Tata plants are isolated from the external grid. This allows the power from the plants to be concentrated and is able to be distributed to specific areas. It also allows the authorities to supply essential customers. Out of the approximately 2400MW-2600MW power supply for electrician in Mumbai, 1600MW will be islanded with Tata’s Trombay Thermal Plant’s 500MW, 600MW hydrogenation units at Khopoli, and 500MW from Adani’s Dahanu. It was impossible to work because the Tata plants were unable to isolate the grid. Adani Power’s Dahanu power plant has 385MW. The supply of 500MW has been cut by Covid.
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According to industry insiders, the Mumbai islanding system has been successful on 27 out of 37 grid disturbances since 1981.
Nitin Raut, energy minister, said that islanding was impossible because of multiple grid failures at different centres. “Besides the trip of circuit-2 at Kalwa Padghe centre, Kharghar transformer also tripped, Urangas power plant experienced a technical problem. He said that this led to overload at Tata and Adani plants, resulting in the failure of the islanding systems.”
Tata Power Company stated in a statement that Mumbai’s islanding system, which saves the city of major power outages, was not separated. Adani Electricity Mumbai Limited said in its statement that the “Islanding Dahanu” saved essential supplies. As the grid inputs become available from the state system, rest supplies will be restored.
Ashok Pendse, an energy expert, says that the islanding system wouldn’t have worked in the face of rising demand.
A committee of experts was established by the state, headed by Professor SA Khaparde from IIT Bombay. It was to examine a similar incident in Mumbai in November 2010. In June 2011, the committee submitted its report.
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