APPLICATION OF DYNAMIC SIMULATION TO CAES G/T CONTROL SYSTEM DEVELOPMENT

摘要

This paper presents extensive use of dynamic simulation of Compressed Air Energy Storage Gas Turbine (CAES G/T) for control system design, control logic development and software validation which significantly reduced development time and cost of the control system and contributed to successful demonstration of a 2,000 kW pilot plant with technical risk mitigation. The CAES G/T is one of the electrical load leveling power plants. High-pressure air compressed by motor-driven compressors in nighttime and stored in underground reservoir is provided to the CAES G/T for power generation in day time. Based on extensive simulation, we finalized control system configuration and control component specification. Developed control logic was tested by comprehensive simulation tests covering almost all expected operations such as start, acceleration, load application and rejection, recuperator active/non-active mode transfer etc. Finally, we conducted hardware in the loop simulation test to assure Electronic Control Unit (ECU) function and performance. An actual ECU and a real time simulator with the CAES G/T model, sensor models and actuator models were used in this test. Tests at a 2,000 kW pilot plant started in January 2001. The full load rejection test showed 9.9% overspeed of the rotor, which is 1% less than the simulation predicted value and within the regulation limit. Only minor control parameter and logic adjustments were required during the tests. Regular operation of the plant started in June 2001.