Control Systems Department Project Management Division Mitsubishi Power Ltd.
Control valves using high-pressure electric hydraulic (EH) oil and a servo valve are used as fuel control valves for gas turbines, as well as for steam control valves for steam turbines in power plants. Due to the recent adoption of the linear variable differential transmitter (LVDT), which is an accurate and durable position sensor, for the servo valve, these control valves have a complicated mechanism and many adjustment items unlike pneumatic control valves, etc., so high-level skills are required for their various settings and sensitivity adjustments. The product presented in this report uses learning circuits, etc., to program such expertise and techniques and has made it possible to automatically and quickly achieve results equal to or better than those of adjustment by engineers with high-level skills.
