A hydraulic turbine governor servomotor action speed deviation early warning method and system

Abstract

The invention provides a method and a system for early warning of the deviation of the action rate of a hydraulic turbine governor relay, comprising: collecting data in the early stage of the health state of the governor, and converting the relay stroke according to the guide vane opening, and then obtaining the relay action Rate data; through different guide vane openings, pressure tank pressure, pressure distribution valve position, and the action rate of the relay under the upstream and downstream water levels, a standard model of the action rate of the relay is established based on the deep artificial neural network; the collected working condition data is substituted into In the standard model of the relay action rate, the standard value of the action rate under this working condition is obtained; the ratio of the standard value to the measured relay speed is used to obtain the relay speed deviation; Change trend, if the future deviation exceeds the set threshold, an early warning will be generated. In the present invention, the prediction result of the deviation degree of the action rate has high precision and can provide a reliable early warning.

Description

technical field [0001] The invention belongs to the technical field of hydroelectric unit operation safety maintenance, and more specifically relates to a method and system for early warning of deviation degree of action speed of a servomotor of a governor of a hydraulic turbine. Background technique [0002] The speed control system of the hydro turbine plays an important role in controlling the operation of the hydroelectric unit, maintaining the stable speed of the unit, and ensuring the stability of the output charge. As an important part of the speed control system, the servomotor directly controls the opening of the guide vane; with the increase of the operating time of the unit, the servomotor gradually deteriorates, wears, jams, etc., which will lead to a decrease in the speed of the adjustment action and affect the speed of the governor. The adjustment effect, even threaten the stable operation of the unit. By establishing the standard model of the servomotor actio...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a method and system for early warning of the deviation degree of action speed of the servomotor of the hydraulic turbine governor, aiming to solve the problem that there are few existing studies on the state analysis of the servomotor of the hydraulic turbine governor system, and the failure It is difficult to carry out diagnostic research, and when the servomotor is worn out, jammed, etc., it is impossible to reflect the operating status of the servomotor in real time

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