Real-time automatic diagnosing and intelligent correcting method for main distributor electric neutral position of speed adjustor

Abstract

A real-time automatic diagnosing and intelligent correcting method for a main distributor electric neutral position of a speed adjustor is composed of an automatic diagnosing method for drifting of the main distributor electric neutral position of the speed adjustor and an intelligent correcting method for the main distributor electric neutral position of the speed adjustor. The automatic diagnosing method for drifting of the main distributor electric neutral position of the speed adjustor includes the steps that a speed adjustor electronic control system acquires a given guide vane opening degree Y output by a hydraulic servo system PID module of the speed adjustor, a given main distributor position M, an adjusting period and other data in real time. Whether relevant data meet the drifting criterion of the main distributor electric neutral position of the speed adjustor or not is judged; if the relevant data meet the criterion, diagnosing stops, and the intelligent correcting link forthe main distributor neutral position is started; and if the relevant data do not meet the criterion, operation returns, and the data continue to be acquired in real time to diagnose drifting of themain distributor electric neutral position. The method aims to solve the problem that a speed adjustor main distributor and a guide vane are frequently adjusted because of drifting of the main distributor electric neutral position of the speed adjustor in the grid-connected operation process, and real-time automatic diagnosing and intelligent correcting of the main distributor electric neutral position of the speed adjustor of a grid-connected operation unit are achieved.

Description

technical field [0001] The invention belongs to the field of automatic control of hydropower stations, in particular to a real-time automatic diagnosis and intelligent deviation correction method for the main power distribution center of a governor. Background technique [0002] During the grid-connected operation of the hydro-generator set, due to the influence of the main distribution position sensor by temperature changes, unstable power supply voltage and other factors, the output main distribution position feedback signal inevitably has a zero drift phenomenon, which leads to the main distribution of the governor. The median produces an offset. The drift of the neutral position of the main distribution electrical system is serious to a certain extent, which will lead to small and frequent fluctuations in the opening of the guide vane, frequent twitching of the position of the main distribution spool, abnormal increase in fuel consumption of the hydraulic follower system...

AI Technical Summary

Problems solved by technology

It aims to solve the problem of frequent adjustment of the main distribution and guide vanes of the governor caused by the drift of the neutral position of the main power distribution of the governor during the grid-connected operation of the unit, and realize the real-time automatic diagnosis of the neutral position of the main power distribution of the speed governor of the power grid-connected unit and intelligent correction

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