29 November 2021

Usa auxiliary power supply complex, the largest APSC in the fields of the Komi Republic passed 5-year milestone of reliable operation.

On November 25, 2016, LUKOIL-Komi commissioned a GTU-CHPP at the Usinsk oil field. Construction was carried out by the LUKOIL-Energoengineering LLC. Application of the main equipment of domestic production and the use of innovative technologies at all construction stages have allowed complete the project in 14 month. The main and reserve fuel for APSC is associated gas. The capability of the power facility are designed to consume 170 million cubic meters of APG per year.



The project has been implemented with the aim of developing production activities at Denisovskiy license area. Usa power supply complex solves several problems:

- Electricity base-load provision in conditions of transmission constraints;
- Thermal power generation for different facilities of the fields;
- Provision hot water for process needs of injection into formation;
- Shortening energy resources consumption costs;
- Decrease depending of the enterprise on the tariff policy in the electricity market;
- Reduction of stress on the environment and improvement of ecological situation at the fields.

Therefore, the possibilities of the APSC, along with an increase in the volume of APG useful use, ensure the growth of hydrocarbon production and the energy independence of the Usinsk, Bayandyn and Eastern-Lambeyshor fields.

Installed electric capacity of GTU-CHPP is 100 MW (rated - 125 MW), thermal capacity is 152.1 Gcal / h. APSC comprises five cogeneration power unit each of which is based on a GTE-25PA gas turbine unit with generator with a capacity of 25 MW. Generation of electricity takes place on scheme "four GTU in operation - one in standby" that guarantees reliable supply.

The GTE-25PA gas turbine unit was devised by UEC-Aviadvigatel JSC (Perm). Since 2013, the unit has been mass-produced by the UEC-Perm Motors enterprise. The design is based on the PS-90GP-25A turbine, the most efficient Russian-made power drive, created on the basis of the PS-90A2 aircraft engine.

For issuance of the thermal power, five waste-heat boilers are installed here, conjugated with GTU. They heat the water using the high temperature of the turbines exhaust gases. Heat supply is carried out similarly to the generating of electricity – on scheme 4+1 with redundancy of one waste-heat boiler. As a result, the cogeneration cycle provides combined energy generation, high fuel effectiveness, environmental friendliness and efficiency of the facility.

In addition to the power units, the structure of the APSC includes an auxiliary boiler house, which also runs on associated gas.

For the reliable operation of the power supply complex, a high-quality treatment of APG before supplying it to the turbines and boiler house is of practical importance. The required fuel parameters on purity, temperature, pressure and flow rate are guaranteed by the ENERGAS multifunctional process system, which is composed of an associated gas treatment station and a booster station of three gas compressor units.

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