Power Tracking Improvement Control Method for AA-CAES on Generation Side

Advanced adiabatic compressed air energy storage (AA-CAES) is a key technology to support a high proportion of new energy grid-connected, with flexible wide operating conditions and superior dynamic response performance. The current AA-CAES power plant is only in rated operation and cannot fully utilize the above advantages. The AA-CAES system needs to have fast and accurate power tracking capabilities in order to cope with the demands of variable operating scenarios where load levels and storage pressures are constantly changing. In this paper, the power tracking performance of the generation side of the AA-CAES system under variable operating conditions is investigated. Two power tracking control improvement methods (improved throttle valve operating flow characteristics, variable parameter PID control) are proposed for two typical AA-CAES systems: large-capacity gas storage, constant-pressure operation, and small-capacity gas storage, sliding-pressure operation. The simulation results show that the power response rate of the power generation side of the improved AA-CAES system is significantly improved, which lays a theoretical foundation for the construction of grid-friendly AA-CAES power plants.