Abstract: A power plant for a compressor station of a gas pipeline system comprises an electric generator intended to meet the compressor station's power requirements and coupled to the shaft of an expansion engine provided with a collection chamber, the inlet of the expansion engine being connected through a heater to a gas main, whereas the outlet of the expansion engine is connected to the combustion chambers of gas turbine installations. The collector chamber of the expansion engine communicates through a cooler for the medium discharged from that collector chamber with another portion of the gas main. The power plant of this invention can be employed at compressor stations of gas pipeline systems having gas mains operating at the same or different design pressures. The power plant is intended to meet power and fuel gas requirements of a compressor station.