Rosseti FGC UES upgrades switching equipment at Vladimir power system's biggest utility

03/31/2022

Three modern Russian-made gas-insulated circuit breakers have been installed at the Vladimirskaya 750 kV substation. The new equipment will improve the quality and reliability of the unit that links the Vladimir, Moscow, Ivanovo, and Yaroslavl power systems.

By now, 10 out of 12 air circuit breakers on the 500 kV switchyard have been replaced by modern gas-insulated analogues. Seven circuit breakers were replaced earlier.

Circuit breakers are one of the types of basic switching equipment at substations. They are designed to break the electrical circuit and suppress the resulting arc. The internal cavities of a circuit breaker are filled with non-flammable gas (SF6) that serves as an insulating and arc-quenching medium.

Gas circuit breakers have a number of advantages over air breakers: they are much more reliable in operation, require no continuous maintenance, and can be controlled automatically. Their service life is over 30 years.
In addition, replacing air circuit breakers with gas-insulated circuit breakers makes it possible to remove the "air network" - compressors and air ducts - from the substation. This eliminates the risks associated with operating pressurized equipment.

Vladimirskaya is the largest substation in the Vladimir Region and the most powerful energy facility in Europe. Its installed capacity is 4850 MVA. Twenty 110-750 kV transmission lines branch off from the substation, connecting it to facilities in the Vladimir, Moscow, Ivanovo, and Yaroslavl power systems. The Vladimirskaya substation supplies power to the Unified National Power Grid from Zhiguli HPP and Kalinin NPP, Kostroma GRES, and supplies power to most major district centers in the Vladimir Region: the cities of Vladimir, Aleksandrov, Yuryev, Kovrov, and Gus-Khrustalny. One of the substation's largest consumers is Yandex data center in Vladimir.


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FSK EES JSC published this content on 31 March 2022 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 12 April 2022 12:01:09 UTC.