Control method and control device for guide vane opening of water turbine

Abstract

The invention discloses a control method and control device for the guide vane opening of a water turbine. Integral output amplitude limits (DB1,DB2) are determined through a water turbine speed governor disturbance test; servomotor stroke parameters are collected, and a feedback value H is determined according to the servomotor stroke parameters; a guide vane opening fixed value M is input, and acontrol voltage output value u is determined through a series integral control standard; the feedback value H and the guide vane opening fixed value are substituted into an integral zero clearing control standard for judgment, and whether integral zero clearing is needed or not is determined according to a judgment result; and the control voltage output value u is transmitted to a data transmission control unit, and a servomotor is moved. Thus, effective output of control voltage can be improved, and when the output voltage is too small, the accuracy of guide vane opening control can be improved, the stroke speed of the servomotor is controlled, and the stability of the guide vane opening is ensured.

Description

technical field [0001] The invention relates to the field of automatic control of hydropower stations, in particular to a method and a control device for controlling the opening of guide vanes of a water turbine. Background technique [0002] A hydroelectric generating set consists of a hydroturbine, a connecting shaft and a generator. The key to controlling its speed and power lies in the adjustment of the output of the hydroturbine. The control and adjustment of the speed and output of the water turbine are related to the opening of the guide vane. When the water turbine is started, the guide vane of the water turbine is opened, and the water at a high place passes through the guide vane of the water turbine and pushes the impeller turntable of the water turbine. By converting the potential energy into mechanical energy, it drives power generation. The machine rotates and converts the mechanical energy into the rotational kinetic energy of the unit. When the hydro-generat...

AI Technical Summary

Problems solved by technology

[0008] The invention provides a method and a control device for controlling the opening of the guide vane of a hydraulic turbine, which solves the problems in the prior art that when the output voltage is small, the final deviation between the fixed value of the guide vane opening and its feedback value is relatively high, and the stroke control of the servomotor Problems with lower accuracy

Images