In response to climate change, a basic plan for electricity supply and demand is being established to abolish coal-fired power generation and expand nuclear power plants and renewable energy to achieve carbon neutrality and reduce greenhouse gases. Further expansion of renewable energy is challenging under the current supply conditions. To minimize employment problems due to the abolition of coal power generation. Combined cycle power generation using LNG is expected to increase for the time being as a traditional stage. In this paper, the allowable temperature conditions for the materials of heat recovery boiler tubes are reviewed through the analysis of the operating conditions of combined cycle power plants. The control logic within the control system is improved and tuned. Emergency stop conditions are enhanced. The steam temperature for the operation of a heat recovery steam generator is increased. The theoretical basis for improving the energy efficiency of combined cycle power plants is determined. Major factors are derived through various tests, and improvement results and effects are discussed. © ICROS 2024.
