Power engineers of the Suna HPPs Cascade of TGC-1 improve operational reliability of power equipment

Power engineers of the Suna HPPs Cascade completed an overhaul of the transformer with the capacity of 31.5 MVA at Kondopozhskaya HPP.

- We have installed breakers with remote drives, SF6 circuit breakers, renovated the relay protection of the transformer, control cables and the bus system - Alexander Sedelnikov, Chief Engineer of the Suna HPPs Cascade noted. - In the course of the repairs high-voltage bushings of 110 kV being the crucial structural elements of the transformer were replaced. The new bushings with RIP insulation have higher thermal and mechanical resistance as compared to their predecessors.

The overhaul was intended to improve the reliability of the main power plant equipment and ensure continuous power supply to the grid connecting Kondopozhskaya HPP with the energy system of the Republic of Karelia.

Reference

Kondopozhskaya HPP is the electrification pioneer of Karelia, which was built under Lenin's GOELRO plan. The building of Kondopozhskaya HPP was recognised as an architectural monument. The HPP's installed capacity is 25,6 MW.

TGC-1 is the leading producer and supplier of electricity and heat in the North-West of Russia. TGC-1 comprises 53 electric power plants within four constituent entities of the Russian Federation: St. Petersburg, the Republic of Karelia, and Leningrad and Murmansk Oblasts.