Intelligent diagnosis and treatment method for faults in the main connection, main distribution and proportional valve hydraulic follower system of the governor

Abstract

The fault intelligent diagnosis and treatment method of the main connection, main distribution and proportional valve hydraulic follower system of the governor, including: the electronic control system of the governor, K1 * 、K12 * Assign initial value. The real-time feedback of the guide vane opening is Y, and the guide vane opening output from the PID module of the governor electrical control system is given as Y 给定 , the main distribution position setting M output by the guide vane opening control module of the hydraulic servo system of the governor 给定 , the main distribution position feedback M, the proportional valve position output output by the main distribution control module is given as B 给定 , the proportional valve position feedback is B and other data. Judgment︱B 给定 Whether ‑B︱ is greater than the threshold b, if︱B 给定 ‑B︱>b holding time is greater than t1, report proportional valve hydraulic pressure follow fault, enter fault treatment. If there is a backup machine and there is no fault, then switch to the standby machine; if the backup machine is faulty or there is no backup machine, then switch off the machine manually, and if the fault is reset manually, switch to the non-machine manual state. The method of the invention can quickly and accurately diagnose the failure of the main connection, the main distribution, and the hydraulic follower system of the proportional valve, and avoid a series of problems such as the failure to expand the accident and cause the load of the unit to be unable to be adjusted normally or even the load to fluctuate greatly.

Description

Intelligent diagnosis and treatment of faults in the main connection, main distribution and proportional valve hydraulic follow-up system of the governor method technical field The invention belongs to the automatic control field of hydropower station, be specifically related to a kind of governor main connection, main distribution and proportional valve hydraulic pressure Follow the intelligent diagnosis and processing method of system faults. Background technique In the normal load regulation process of the grid-connected operation of the hydro-generator set, if the proportional valve, the main pressure distribution valve, the relay etc. Failure of components, intermittent jamming and refusal to move, or oil leakage and pressure relief in the control oil circuit, etc., the fault diagnosis is not carried out in time It will lead to a series of problems such as the unit load cannot be adjusted normally, and even the unit load will fluctuate greatly, which will seriou...

AI Technical Summary

Problems solved by technology

[0003] The invention provides an intelligent diagnosis and processing method for faults in the main connection, main distribution and proportional valve hydraulic follow-up system of a speed governor, which can quickly and accurately diagnose the faults of the main connection, main distribution and proportional valve hydraulic follow-up system, and improve the accuracy and real-time accuracy of fault diagnosis. In order to avoid a series of problems such as the failure to adjust the load of the unit due to the expansion of the accident and even the large fluctuation of the load

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