220kV «Mezhdurechenska» SS Complex Reconstruction

The Project Technical-Economic Indices

• Total area, m² - 22780.
• 220 kV switchgear:
  - Typical scheme No.220-17 «1 1/2 circuit breaker scheme– three circuit breakers per two connections» with three 1 1/2 circuit breaker lines.
  - Quantity of connections, pc– 1, including 4 reserve connections.
  - Design version– GIS.
• 110 kV switchgear:
  -Non-typical scheme «Two working busbars sectionalized by the circuit breakers with two transformers to be connected via the circuit breakers junction and by two busbar circuit breakers» (non-typical).
  - Quantity of connections, pcs– 24, including 4 reserve connections.
  - Design version– GIS.
• 35 kV switchgear:
  - Non-typical scheme «One working busbar sectionalized by the circuit breakers with the third transformer to be connected via the circuit breakers junction carrying out the functions of the sectionalizing circuit breaker».
  - Quantity of connections, pcs– 11, including 4 reserve connections
  - Design version– indoor switchgear.
• 6 kV switchgear:
  - Non-typical scheme «One working busbar sectionalized by two sectionalizing circuit breakers».
  - Quantity of connections, pcs – 24 pcs, including 6 reserve connections
  - Design version – indoor switchgear.
• Power auto transformers:
  - Rated voltage, kV– 220/110/6,
  - Unit capacity, МVА– 200,
  - Quantity, pcs.– 3
  - Quantity of stages / voltage control limits:
       For 220 kV – 12 / 202,4-257.6 kV,
       For 110 kV – 12 / 106.5-135.5 kV.
• Power transformers:
  - Rated voltage, kV – 110/35/6,
  - Unit capacity, МVА – 63,
  - Quantity, pcs. – 3.
  - Quantity of stages / voltage control limits:
      For 110 kV – / 96.6-133.4 kV;
      For 35 kV – 12 / 36.6-40.4 kV.
• Reactive capacity compensation means:
  - Static condensers batteries, pcs – 2, Unit capacity – 25 МVar.

Brief Description of Main Solutions

The 220/110/35/6 kV Mezhdurechenskaya SS serves for power conversion and electric power distribution between the consumers of Mezhdurechensk district of Kemerovsky region.

The main power supply source of Mezhdurechenskaya SS is Tom-Usinsk GRES (City District Power Plant) of the 1272 MW installed capacity.    The power is supplied via 220 kV double-circuit OVL of Tom-Usinsk GRES – Mezhdurechenskaya SS.

Besides the main power supply source there is the reserve power supply source at Mezhdurechenskaya SS –110 kV double-circuit OVL of Tom-Usinsk GRES – Myskovskaya and 110 kV OVL Myskovskaya – Mezhdurechenskaya.

The main electric power consumers are the enterprises-coal producers, railway, housing and communal enterprises of Mezhdurechensk town and Mezhdurechensk district.

To the existing 220/110/35/6 kV Mezhdurechenskaya SS are connected the following consuming SS:

• For 110 kV voltage: Kariernaya, Raspadskaya, Krasnogorskaya, Tomusinskaya, Myskovskaya, Mezhdurechenskaya - traction;
• For 35 kV voltage: Zapadnaya, Vostochnaya; for 6 kV voltage: of the Tomusinsk power administration, the Works KPDS, Works TRMZ, market «Yuzhny».

Regarding the fact that as a result of reconstruction the 220 kV OVL Mezhdurechenskaya – Теbа will be a separate OVL, Mezhdurechenskaya SS will serve for electric power of 220 kV voltage transmission between Kuzbas and Khakassk power systems: ensure the power flow, the voltage levels control in the 110, 220 kV networks; participate in the system emergency automation control effects.

Total transformer capacity of Mezhdurechenskaya SS after the reconstruction having been completed will be 789 МVА (3 х 200 МVА + 3 х 63 МVА).

The construction started in 2013. The construction was delayed in 2014.

The renewed construction is scheduled in 2017.