Speed controller hydraulic slave system median self-diagnosis self-positioning self-adaptive method

Abstract

Provided is a speed controller hydraulic slave system median self-diagnosis self-positioning self-adaptive method. The method comprises: a speed controller electrical control system acquiring main distribution position feedback M, main distribution position set Mset and other data; detecting whether a speed controller hydraulic slave system is in a static balance, criterion including main distribution position set Mset being constant, if the criterion being satisfied, performing speed controller proportional valve median self-diagnosis, if not, waiting the criterion condition to be satisfied;performing speed controller proportional valve median drifting self-diagnosis, criterion including the main distribution position feedback M not being equal to the main distribution position set Mset;if M=Mset, setting of a proportional valve median set value B0 being rational, the proportional valve median set value B0 being equal to a proportional valve actual median value B0actual, entering amain distribution electrical median diagnosis step; if M is not equal to Mset, median of a proportional valve drifting, and setting of the proportional valve median set value B0 being not rational, performing proportional valve electrical median positioning correction. The method solves problems that a speed controller hydraulic slave system frequently adjusts and guide vane opening cannot be adjusted in place and other adjusting quality caused by drifting of the speed controller main distribution and the proportional valve electrical median, so as to adapt to current operating working conditions.

Description

technical field [0001] The invention relates to a self-diagnosis and self-positioning self-adaptive method for a neutral position of a hydraulic servo system of a governor, which belongs to the field of automatic control of hydropower stations. Background technique [0002] During the grid-connected operation of the hydro-generator set, the position sensor of the actuator hydraulic servo system of the governor (such as the main distribution) and the output module of the electronic control system of the governor (such as the proportional valve drive module) are subject to temperature changes, and the power supply voltage is inconsistent. Due to the influence of stable factors, there is inevitably a zero drift phenomenon, which leads to the deviation of the electrical neutral position of the hydraulic actuator of the governor. The drift of the main distribution electrical neutral position is serious to a certain extent, which will lead to small and frequent fluctuations in the...

AI Technical Summary

Problems solved by technology

Solve the adjustment quality problems such as the frequent adjustment of the hydraulic servo system of the governor and the inability to adjust the opening of the guide vane due to the drift of the electrical neutral position of the main distribution of the governor and the proportional valve, so as to adapt to the current operating conditions

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