Bibliotechnaya 110/35/10 kV substation

Reconstruct an operating 110/35/10 kV substation, replacing the power transformers with 40,000 kVA units, and fully renew the switchgear of all voltage classes.

The substation stands in a built-up area of Tashkent, in the Almazar district, and supplies city consumers over 35, 10 and 6 kV lines. The new transformers increase the capacity available to the district.

110 kV outdoor switchyard to scheme 110-4N on block-type equipment, two new light-gauge steel buildings — 35 kV indoor switchgear and 6–10 kV indoor switchgear combined with the control building — and a new relay protection and automation system. BIONIKA carried out the whole cycle of works on site.

Made and supplied for the site: 110 kV outdoor switchyard blocks (disconnectors, circuit breakers, CTs, VTs, surge arresters, neutral earthing switches), rigid 110 and 10 kV busbars, 10 KYN61-35 kV cells, 36 K-104 6–10 kV cells, relay protection and automation cabinets for transformers and lines, metering, central signalling, auxiliary supply and DC system cabinets.

Replacement of the 40,000 kVA power transformers, installation of 110 kV switchyard blocks and busbars, assembly of indoor switchgear buildings from light-gauge steel, installation of 35 and 6–10 kV cells, relay protection cabinets in the control building and cable structures.

Checks of secondary circuits, setting of protection and automation for transformers, 35 kV lines and 6–10 kV incomers, commissioning of metering and DC supply, energised testing of the scheme.

Acceptance tests of transformers and 110, 35, 10 and 6 kV equipment.

In 2025 the substation was put back into service after reconstruction: 40,000 kVA transformers, a new 110 kV outdoor switchyard, 35 kV indoor switchgear and 6–10 kV indoor switchgear.