Sergey Sobyanin opened the Medvedevskaya Substation constructed by STG

On June 4, 2018 Moscow mayor Sergey Sobyanin opened the first in Moscow region digital substation (SS) Medvedevskaya with a capacity of 110 kW located at the Skolkovo Innovation Center. The substation was designed and constructed by JSC Stroytransgaz by the order from JSC Moscow United Electric Grid Company (MOESK - Rosseti (Russian Electric Networks branch)).

“This is a unique facility being the first digital substation in Moscow. Besides, the substation is the first one for the last decades to be fully completed with Russian equipment”, – Sergey Sobyanin mentioned. Opening of the modern power feeding centre for metropolitan area was as well attended by General Director of PAO Rosseti Pavel Livinsky, General Director of PAO MOESK Petr Sinyutin and General Director of JSC STG Mikhail Khryapov.

Medvedevskaya SS is the third power feeding centre for the Skolkovo Innovation Center. It was built to cover the growing energy shortfall and is now providing the power supply reserve for nearby facilities under construction. There is a possibility to replace the existing substation transformers for the ones with higher capacity  (for 2x100 MVA). At the moment two power transformers are installed at the substation (2x80 MVA).

The IEC 61850-9.2 standard is implemented at the substation, meaning that measurements will be transmitted from conventional measuring transformers to the relay protection and automation device via analogue signal transducers (MU).  Power industry’s transit to digital techniques allows reducing capex for construction of facilities, thus reducing opex as well.

The main advantages of digital substation are as follows:

• reduction of costs for cables and cable structures
• reduction of costs for terminals
• reduction of area occupied by equipment
• increased service life of power equipment
• facilitation of both operation and maintenance
• reduction of abrupt failures in primary equipment
• reduction of disruptions, malfunctions and faults in Relay Protection and Emergency Automation.

The substation is unmanned as controlled remotely from the unified central control room, with no operating personnel involved. Since the substation is digital being controlled from a remote control room, special attention was paid to informational safety during its design and construction.

The substation construction commenced in October, 2016 and completed in May, 2018.