26 October 2012

Since April 2011, a combined cycle gas turbine unit has been operating at the Astrakhan SDPP site (LUKOIL-Astrakhanenergo), which became the first new-generation facility built by PJSC LUKOIL in the South of Russia. CCGT-110 actually replaced the power plant that had worked out its resource, and the obsolete equipment is being dismantled.

Overall, the commissioning of CCGT-110 minimized the negative impact on the environment, increased the generation of electricity in the power grid of the Astrakhan Region, optimized the city heating system, increased the reliability of energy supply to the housing complex and industrial enterprises, which created conditions for the development of infrastructure in regional center.

Combined-cycle plant is equipped with efficient equipment with high technical indicators. Here they operate: two GE gas turbine units of the type LM6000 PF DLE SPRINT with a capacity of 46.64 MW each, waste-heat boilers of two pressures KGT-44/4.6-435-13/0.5-210 with a steam productivity of 58 t / h each (Belenergomash), and steam turbine T-14/23-4.5/0.18 with a capacity of 23.8 MW (Kaluga Turbine Plant).

The technologies used in the combined-cycle plant provide combined energy generation, high fuel efficiency and overall facility efficiency. The designed electric capacity of the CCGT is 110 MW (actual - 121 MW), thermal capacity – 66 Gcal / h.

Local natural gas is used as the fuel. Its pre-set parameters in terms of purity, temperature, pressure and flow rate are guaranteed by the ENERGAS process system: a gas treatment station and a compressor station (high-pressure CS) of two gas booster units.

At present, into this system there is integrated low-pressure CS installed on the backup gas supply pipeline. The standby CS consists of two compressor units (CU) which, if necessary, will compress the low-pressure gas and direct it to the main booster station for subsequent additional compression and feeding into the CCGT-110 turbines.

CUs were made based on screw oil-filled compressors; high-tech equipment provides a high compression ratio: the gas inlet pressure is 0.2 MPa, the delivery pressure is 1 MPa (limited by the settings of main CS). The unit capacity of CU is 13,000 m3 / h.



The design requirements for the purity of fuel gas are ensured by the multistage filtration system – each standby unit is equipped with an outdoor scrubber, an inlet strainer, a gas-oil separator of the 1st stage of purification and a coalescing (safety) filter of the 2nd stage.

CUs are located in their own shelters of container type, equipped with life support systems. According to safety requirements, both units are equipped with fire detection, gas detection, alarm systems, fire-extinguishing systems. Low-pressure compressor station is fully automated, local ACSs of units are integrated with the upper level of the automated process control system of facility.

The comprehensive commissioning of the CS of backup gas supply (erection supervision, start-up and adjustment works, individual and integrated tests), as well as training of the operating personnel were fulfilled by the specialists of the ServicENERGAS (ENERGAS Group).

The project increased the reliability of fuel supply to the CCGT and minimized the risk of unplanned shutdowns of the power unit.

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