The PUMP-HEAT (Performance Untapped Modulation for Power and Heat via Energy Accumulation Technologies) project aims to develop the concept of a new advanced energy system, which integrates Combined Cycle Gas Turbine (CCGT) plants and Combined Heat and Power (CHP) plants with fast-cycling highly efficient heat pumps and thermal energy storage for further enhancing the flexibility. The dynamic modeling and simulation tools are essential for investigation of a PUMP-HEAT conceptual design and for analysis of its dynamic characteristics in operation. It is also useful to implement a dynamic simulator as a built-in emulator in a real test facility to confirm the integration characteristics of each equipment and the entire control system.In this study, a dynamic modeling of a real CCGT/CHP power plant, especially targeting a Heat Recovery Steam Generator (HRSG) and Steam Turbine (ST) system, is constructed based on the Modelica-based tool developed by Central Research Institute of Electric Power Industry (CRIEPI). The component models of this tool are developed based on mass and energy conservation equations for the dynamic analysis of thermal power generation systems. The validity of the model is evaluated comparing with operational data for both steady state and dynamic behavior, and the potential as a real-time simulator is also discussed from the viewpoint of simulation accuracy and calculation speed. In addition, the load following characteristics of ST power output by dynamic simulation are investigated.
