Comprehensive Control of PWR Pressurizer Using Typical Fuzzy Controllers

A comprehensive fuzzy control scheme for pressure and water level of PWR pressurizer is presented in this paper, where three typical fuzzy controllers are used to control the electrical heater, spray and relief valves, as well as feed valve, respectively. An integral-separated method is adopted in pressure control system. Computer simulation results in steam load step change, linear change and load-rejection operating conditions have shown that static and dynamic control performance of pressure and water level have been improved greatly, and the TFC based comprehensive fuzzy control scheme is effective and much better than the GA-FC and PID control schemes.