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New 'Koltsevaya' Substation Commissioned in Tashkent and Region to Enhance Power Supply Reliability
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Gazeta.uz
gazeta.uz

New 'Koltsevaya' Substation Commissioned in Tashkent and Region to Enhance Power Supply Reliability

On November 7, the 'Koltsevaya' substation with a voltage of 500 kV was launched in Tashkent region. This facility is designed to improve the reliability of electricity supply to the capital and certain districts of Tashkent region, as well as ensure more efficient load distribution across existing electrical grids.

According to information provided by the press service of the Ministry of Energy of Uzbekistan, the total cost of the entire project, implemented with the assistance of the World Bank, reached 171.4 million US dollars. The 'Koltsevaya' substation has a capacity of 1602 MVA and is considered one of the most modern and largest high-voltage infrastructure facilities in Uzbekistan.

Air power transmission lines were constructed as part of this project. The length of 220 kV lines is 213 kilometers, and 500 kV lines is 72 kilometers, totaling 285 km of new high-voltage lines. Currently, the process of integrating these new elements into the country's overall power system is underway.

The Ministry of Energy noted that due to the redistribution of load in the capital region, the load on the Tashkent Thermal Power Plant will decrease, which will allow for the discontinuation of fuel oil burning. The World Bank previously indicated that 'Koltsevaya' is the first substation in the country where control and monitoring are conducted using advanced digital technologies. The facility will receive energy from both power plants in the Syrdarya region and wind farms located in the southwestern parts of the country.

This project is part of a larger initiative called 'Transformation of the Electric Power Sector and Sustainable Power Transmission.' It is being implemented by 'National Electric Networks of Uzbekistan' with financial support from the World Bank and has a total cost of 380 million dollars. This project was approved in 2021 and includes not only the construction of the 'Koltsevaya' substation but also the modernization, reconstruction, and expansion of twenty-two outdated high-voltage substations, as well as the laying of power lines in almost all regions of Uzbekistan, and the introduction of modern solutions for energy transmission management and monitoring.

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Within the framework of a major investment project to develop Uzbekistan's power transmission system, construction work has been completed in the Syrdarya and Tashkent regions. The new facilities are currently being connected to the Unified Energy System of Uzbekistan, and commissioning work is underway.

The project included the construction of the 'Khalqa' substation with a capacity of 1602 MVA, as well as the construction of 220 kV and 500 kV overhead power lines. The 213 km of 220 kV lines and the 72 km of 500 kV lines provide a total length of 285 km for the new network infrastructure.

The total cost of this investment project is 171.4 million US dollars, and it was implemented with the participation of the World Bank. The new infrastructure is expected to increase the capacity of the national power grid, improve electricity flow efficiency, and strengthen grid stability.

Furthermore, the project aims to ensure reliable electricity supply to the regions, optimize the load on existing networks, and create the possibility for connecting new generation capacities in the future. The final integration of the constructed facilities into the Unified Energy System of Uzbekistan is currently ongoing.

Modernization of Ten Substations Underway in Tashkent to Increase Power System Capacity
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Modernization of Ten Substations Underway in Tashkent to Increase Power System Capacity

The modernization of ten electrical substations is being carried out in the city of Tashkent with the aim of increasing their throughput capacity and ensuring more stable electricity supply. The replacement of power transformers will lead to an increase in total additional capacity by 333.2 megavolt-amperes, allowing the entire system to cope with increased loads.

The work covered the following substations: 'Risovaya', 'SAZIIT', 'Istikbol', 'Yangi Tuzel', 'Tuzel', 'Karasu', 'Charogon', 'Gornaya', 'Bibliotechnaya', and 'Vystavochnaya'. More powerful transformers were installed at each of these stations, which contributed to the increase in throughput capacity and the creation of additional reserve.

The most significant increase in capacity was recorded at the 'Karasu' substation, where the indicator rose from 53.6 to 138.6 megavolt-amperes. Additionally, the capacity at 'Yangi Tuzel' increased almost fourfold—from 12.6 to 50 megavolt-amperes. At the 'Istikbol' station, after the completion of the work, the capacity will reach 126 megavolt-amperes, exceeding the previous 80 megavolt-amperes.

Overall, this modernization will enable Tashkent's energy infrastructure to better withstand loads, minimize the probability of outages, and improve the overall quality of electricity supply for all consumers. It should be noted that as of the end of 2025, Uzbekistan has commissioned 11 substations with a total capacity of 1,614 megavolt-amperes and 420 kilometers of electrical networks.

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