An improvement on LQG controller for liquid level control of separator in an OTEC experimental plant using Uehara cycle

This research proposes an improved controller design methodology for liquid level control of separator in an ocean thermal energy conversion (OTEC) plant using Uehara cycle. In the previous research, the control system design for liquid level control of separator was conducted based on the LQG control theory with state estimation via stationary Kalman Filter. However, it is verified by the simulation of this research that an assumption on an integral degrades the estimation accuracy of a state variable. To cope with this problem, in this research, the reset of integration is introduced to the control system. The usefulness of the proposed method is confirmed through simulation.