Hydraulic turbine governor servomotor action rate deviation degree early warning method and system

Abstract

The invention provides a hydraulic turbine governor servomotor action rate deviation degree early warning method and system. The hydraulic turbine governor servomotor action rate deviation degree early warning method comprises the steps of collecting the early data of an governor in a healthy state, obtaining the travel of a servomotor through conversion according to the guide vane opening degree,and obtaining action rate data of the servomotor ; establishing a servomotor action rate standard model based on a deep artificial neural network through servomotor action rates under different guidevane opening degrees, different pressures of a pressure oil tank, different positions of a pressure distributing valve and different upstream and downstream water levels; substituting the acquired working condition data into the servomotor action rate standard model to obtain a standard value of the action rate under the working condition; obtaining the servomotor rate deviation degree through the ratio of the standard value to the actually measured servomotor rate; and conducting prediction on the obtained servomotor action rate deviation degree sequence to obtain a future change trend, andgenerating early warning if the future deviation degree exceeds a set threshold value. The precision of the action rate deviation degree prediction result is high, and reliable early warning can be provided.

Description

Technical field [0001] The present invention belongs to the field of operation of the hydropower unit operating safety maintenance technology, and more particularly to a wheeled genus warning method and system for a turbine speed receiving power. Background technique [0002] The turbine speed control system operates in the control of the hydropower unit, maintaining the speed of the unit speed, ensuring the stability of the output charge plays an important role. The relay is an important part of the speed control system, directly controlling the opening degree of the vanes; with the increase of the operation time of the unit, the relay gradually deteriorates, wear, snipping, etc., which will result in a decrease in adjustment operation, affecting the governor. The adjustment effect, even the stable operation of the threat unit. By establishing the power standard model under different working conditions data, and obtains the speed of the power rate of the power supply rate, it is...

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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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