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Construction of 220/132 KV substation based on Gas Insulated System (GIS) technology has been completed in Markichok of Ambukhareni Rural Municipality of Tanahun. The Markichoke substation constructed under the Marsyangdi-Kathmandu 220 KV transmission line project was put into operation on Tuesday by supplying electricity.
The Marsyangdi-Kathmandu 220kV double circuit transmission line from Markichoke substation to Kathmandu has also been charged to 220kV and put into operation on Tuesday to bring the power of the hydropower project in the Marsyangdi river watershed area to Kathmandu valley.
The 82 km transmission line was charged at 132 kV from 7 June 2079 and put into operation. With the charging of the Markichoke substation, the Marsyangdi-Kathmandu transmission line has been put into operation at 220 KV.
In order to supply the electricity of the hydroelectric projects in the Marsyangdi river watershed area to Kathmandu Valley and to strengthen the integrated power system within the country, the transmission line and 220/132 kV substations have been constructed in Markichoke and Matatirth of Kathmandu as part of the Marsyangdi-Kathmandu 220 KV transmission line project.
Matatirtha substation has been completed and has been operational since last May. Two power transformers of 160/160 MVA capacity have been placed in both the substations. The capacity of both substations is 320/320 MVA.
Executive Director of Nepal Electricity Authority, Kulman Ghising said that with the commissioning of Markichoke substation, infrastructure has been created to bring electricity from the hydroelectric projects of the Marsyangdi River Corridor to the Kathmandu valley through the 220 kV transmission line.
This will improve the voltage of the country's integrated electricity system and the electricity will be more adequate, reliable and quality. Executive Director Ghising said that after the completion of the Markichoke-Bharatpur section under the Marsyangdi Corridor transmission line project, electricity can be sent to Bharatpur as well. Markichoke-Bharatpur section is being worked on with the goal of completing the construction by next May.
Marsyangdi-Kathmandi transmission line from Markichoke to Badbhanjyang in Chandragiri municipality and the Trishuli-Kathmandu 220 kV transmission line built to bring the power of the Trishuli river watershed area to Kathmandu valley has been interconnected at Badbhanjyang. Both the transmission lines of Trishuli and Marsyangdi have been connected to a multi-circuit (four circuits) from Badbhanjang and integrated into Matatirtha substation.
About 1/1000 megawatt electricity coming from Marsyangdi-Kathmandu and Trishuli-Kathmandu transmission line will be connected to Badbhanjyang and from there about 2000 megawatt electricity will be included in Matatirtha substation through multi-circuit transmission line.
As part of the Marsyangdi-Kathmandu transmission line project, the performance of the company that got the contract for the construction of Matatirth and Markichoke substations was not satisfactory, the contract was terminated and a new contract was signed with China Machinery Engineering Corporation in December 2077, and the rest of the construction was moved forward. The estimated cost of both the substations is around two and a half billion rupees, said the head of the project, Laxman Phuyal.
The Marsyangdi-Kathmandu transmission line project was started with the investment of the Nepal government and authorities and the grant of the Norwegian government and the concessional loan of the Asian Development Bank.
