Intelligent Diagnosis and Treatment Method for Faults of Governor Main Matching and Proportional Valve Hydraulic Following System

Abstract

The invention provides an intelligent fault diagnosis and treatment method of a governor main allocation and proportional valve hydraulic following system. The intelligent fault diagnosis and treatment method includes the steps that a governor electronic control system is initialized, and an initial value of K1<*> is assigned; the governor electronic control system collects a main allocation position given M<given> output by a guide vane opening control module of a governor hydraulic servo system, a main allocation position feedback M, a proportional valve position given B<given>output by a main allocation control module, a proportional valve position feedback B and other data in real time; whether |B<given>-B| is greater than a threshold b or not is judged, if the holding time of |B<given>-B|>b is greater than t1, a proportional valve hydraulic following fault is reported, and fault treatment is executed; whether |M<given>-M| is greater than a threshold m or not is judged; the main allocation position moving speed V<M> is calculated; a characteristic value K1 is calculated, wherein K1=V<M> / (M<given>-M); the K1 is compared with a standard characteristic value K1<*>, if K1 / K1<*> isless than or equal to 0.01 and the holding time is greater than t2, the proportional valve hydraulic following fault is reported, and fault treatment is executed, and otherwise, K1<*>=(K1+K1<*>) / 2; and if a standby machine is arranged and has no fault, the standby machine is cut off, and if the standby machine has a fault or no standby machine exists, the machine is cut off and manual operation isexecuted. According to the intelligent fault diagnosis and treatment method of the governor main allocation and proportional valve hydraulic following system, a series of problems of the unit load cannot be adjusted normally or even the load appears drastic fluctuation due to accident expansion and the like can be solved.

Description

technical field [0001] The invention belongs to the field of automatic control of hydropower stations, and relates to an intelligent fault diagnosis and processing method for a hydraulic follower system of a speed governor main configuration and a proportional valve. Background technique [0002] During the normal load adjustment process of the grid-connected operation of the hydro-generator set, if the proportional valve, the main pressure distribution valve and other actuators fail intermittently and refuse to move, or the control oil circuit has oil leakage and pressure relief, etc., the fault diagnosis and treatment have not been carried out in time , will lead to a series of problems such as the failure to adjust the load of the unit normally, and even a large fluctuation in the load of the unit, which will seriously affect the safe and stable operation of the unit and cause an accidental shutdown. At present, the hydraulic follow-up system fault diagnosis technology of...

AI Technical Summary

Problems solved by technology

Avoid a series of problems such as the failure to adjust the load of the unit due to the expansion of the accident, or even a large fluctuation in the load

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