Abstract: A case taken from a compressor station in West-to-East Gas Pipeline is given to investigate the application feasibility of gas-vapor combined cycle power generation technology to improve the thermal efficiency of the generating unit. A field test was made to inspect the content of fuel gas components including the index parameters and calculate the exhaust enthalpy of gas turbine. The generated energy from united cycle generating sets was determined according to the average efficiency of the turbine generator set to demonstrate the feasibility and economy of using the gas-turbine waste heat power generation in electric driven compressor sets. The results showed that the generated energy of entire sets can meet the electricity demand of electric driven compressor sets up to 89.37%, featuring a four-year investment cost recovery period and a remarkable energy-saving effect, considerable long-running economic efficiency, and popularization and application value.