A control method and control device for guide vane opening of a water turbine

A guide vane opening and water turbine technology, which is applied in the control algorithm type, safety device, mechanical equipment, etc., can solve the problems of low accuracy of servomotor stroke control, high guide vane opening setting value and final deviation of its feedback value.

CN108443057BActive Publication Date: 2019-11-08YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-11-08

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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.
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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...

Examples

Embodiment Construction

[0056] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0057] In the process of industrial automation control, when monitoring data, the servomotor is used for data collection, and the relevant parameters of the servomotor stroke are collected, and then the monitoring data is transmitted to the PID control system for processing, and finally the working data is displayed on the monitoring sys...