3/27/2023 0 Comments National grid electric![]() ![]() The union territories of Andaman and Nicobar Islands and Lakshadweep are not connected to the National Grid. The sole remaining regional grid, the Southern Grid, was synchronously interconnected to the Central Grid on 31 December 2013 with the commissioning of the 765 kV Raichur-Solapur transmission line, thereby establishing the National Grid. The Northern grid was also interconnected in August 2006, forming a Central Grid synchronously connected operating at one frequency. The Western Grid was interconnected with the aforementioned grids in March 2003. The first interconnection of regional grids was established in October 1991 when the North Eastern and Eastern grids were interconnected. The links were subsequently upgraded to high capacity synchronous links. Regional grids were initially interconnected by asynchronous HVDC back-to-back links facilitating limited exchange of regulated power. In the 1990s, the Indian government began planning for a national grid. These regional links were established to enable transmission of surplus electricity between States in each region. The grids were the Northern, Eastern, Western, North Eastern and Southern Grids. Individual State grids were interconnected to form 5 regional grids covering mainland India. India began utilizing grid management on a regional basis in the 1960s. A proposed interconnection between Myanmar and Thailand would facilitate the creation of a power pool and enable trading among all BIMSTEC nations. An undersea interconnection to Sri Lanka ( India–Sri Lanka HVDC Interconnection) has also been proposed. There are also synchronous interconnections to Bhutan, and asynchronous links with Bangladesh, Myanmar, and Nepal. The Union Government regulates grid frequency by requiring States to pay more when they draw power at low frequencies. The permissible range of the frequency band is 49.5-50.5 Hz, effective 17 September 2012. India's grid is connected as a wide area synchronous grid nominally running at 50 Hz. It is one of the largest operational synchronous grids in the world with 371.054 GW of installed power generation capacity as of 30 June 2020. The National Grid is owned, and maintained by state-owned Power Grid Corporation of India and operated by state-owned Power System Operation Corporation. The National Grid is the high-voltage electricity transmission network in India, connecting power stations and major substations and ensuring that electricity generated anywhere in India can be used to satisfy demand elsewhere. The 5 regional power grids in India, which were interconnected to establish the National Grid. ![]()
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