With commissioning of second power generating unit, the Grozny TPP has reached its full design capacity

28 June 2019

At the Grozny TPP, the commissioning of second power generating unit took place (the first was put into operation in December 2018). The new power plant has reached its full design capacity of 360 MW.

Each power generating unit with capacity of about 180 MW consists of SGT5-2000E gas turbine unit (GTU) created on a basis of gas turbine and generator manufactured by Siemens.

It should be noted that on the power unit No. 2 the newest version of the turbine is installed.

During the construction of the power plant, special focus was paid to the introduction of equipment and process systems of Russian manufacturers. Among them automation systems, relay protection, dry fan cooling towers, chimneys with an emission monitoring system, gas treatment units, equipment for water cleaning, electrical components for switchgears.

Designed parameters of fuel gas (on temperature, pressure, and flow rate) and its feeding to the GTU are provided by a booster compressor station consisting of three modular compressor units (CU). The step-by-step commissioning of the BCS (erection supervision, start-up and adjustment works, own testing, comprehensive operability check as a part of the TPP, training of operating personnel) was conducted by leading engineers of the ENERGAS Group.

This equipment is the most powerful among all 233 gas compressor units of screw type, put into operation by ENERGAS specialists.

The capacity of each booster compressor (rated – 34,200 kg / h, maximum – 39,240 kg / h) is up to 100% of the maximum flow of gas fuel per turbine. Two operating units give in total the necessary gas flow to two gas turbine power units. In this case, the third compressor is ready to be switched on by ATS (automatic transfer switch).

Automated control systems are responsible for the monitoring, control and safe operation of compressor units. ACS are placed in separate containers located in the immediate vicinity of the block-modules with process equipment of CU. Local ACS is combined using the group control function and integrated into the APCS of the power plant.

As a result, the compressor station is capable of automatically maintaining the required parameters of gas fuel at the inlet to the GTU control unit. In the event of failure of one of the two operating CUs, the remaining unit is maximally quick (no more than 3-5 seconds) gaining nominal capacity, and the standby unit for no more than 40 seconds ensures the necessary BCS capacity for the operation of power units without reducing the total load of GTU.

The Grozny TPP has become one of the most important elements of the power system of the Chechen Republic. It reduces the problem of electric power shortage in the region, as well as increases the reliability of the Chechen power system and the southeastern part of the UPS of the South as a whole under conditions of an increase in load forecast.

The operating company of new power plant is PJSC Wholesale Generation Company OGC-2. The project has been implemented by the Gazprom Energoholding Group within the framework of a system of capacity supply agreements (CSA). The Grozny TPP is the final CSA project of the Group’s companies.

REFERENCE. Gazprom Energoholding manages the Gazprom Group companies in the electric power industry and is the leader in the production of thermal and electric energy by thermal generation companies in Russia. The plants of Gazprom Energoholding generate about 1/6 of the total electricity of the Unified Energy System of Russia. The main production companies of Gazprom Energoholding are PJSC Mosenergo, PJSC TGC-1, PJSC OGC-2 and PJSC MOEK.

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