Research on Switching Technology of Single Shunt Valve for 2×330 MW Unit
In order to reduce the throttling loss of the unit and improve the thermal efficiency of the unit,valve steam distribution characteristic tests and research on single valve and sequence valve switching technology were conducted on the unit.The valve flow characteristic curve,overlap degree,and unit coordinated control parameters were modified to achieve single sequence valve switching of the unit,ensuring no disturbance to the unit load during the switching process,and achieving the goal of optimizing the turbine governing characteristics and improving the unit operating efficiency.