FUZZY POWER-CONTROL ALGORITHM FOR A PRESSURIZED-WATER REACTOR

A fuzzy power control algorithm is presented for automatic reactor pow er control in a pressurized water reactor (PWR). Automatic power shape control is complicated by the use of control rods with a conventional proportional-integral-differential controller because it is highly co upled with reactivity compensation. Thus, manual shape controls are us ually employed even for the limited capability needed for load-followi ng operations including frequency control. In an attempt to achieve au tomatic power shape control without any design modifications to the co re, a fuzzy power control algorithm is proposed. For the fuzzy control , the rule base is formulated based on a multiple-input multiple-outpu t system. The minimum operation rule and the center of area method are implemented for the development of the fuzzy algorithm. The fuzzy pow er control algorithm has been applied to Yonggwang Nuclear Unit 3. The simulation results show that the fuzzy control can be adapted as a pr actical control strategy for automatic reactor power control of PWRs d uring the load-following operations.