Piecewise LQR/H_∞ control for water level of steam generator

The steam generator, an important heat transfer device in nuclear power plant that connects primary loop and secondary loop, and its water level control of steam generator is very important to the safety and the economic operation of nuclear power plant. In order to control the water level effectively, in this paper, the linear parameter varying model of steam generator was considered as the model to design the LQR/H∞ controller, the solution problems of the controller is transformed into the equivalent linear matrix inequality feasible solution problem to design a output feedback controller. The effectiveness is evaluated by simulation and the simulation results show that the controller has the tracking ability and the anti-disturbance ability. (authors)