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A Fault Diagnosis Method for Main Pressure Distribution Valve of Hydraulic Turbine Governor

A main pressure valve, fault diagnosis technology, applied in mechanical valve testing, electrical testing/monitoring and other directions, can solve the main distribution position contact without installation conditions, different sensitivities to judge the fault, the judgment conclusion is not satisfactory, etc. problem, to overcome the unreliable judgment accuracy, great promotion significance, and comprehensive judgment basis.

Active Publication Date: 2019-08-23
NARI TECH CO LTD +1
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  • Abstract
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  • Application Information

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Problems solved by technology

It can only be judged that the main distribution is stuck in the opening direction, and because the installation position of the position switch and the debugging clearance are not the same, this results in different sensitivities in judging the fault, and the judgment conclusion is difficult to satisfy
It is too hasty to judge whether to stop at overspeed only by a simple position switch, and the trigger conditions are harsh, and the delay time is long. When the fault is reported, the impact of the fault has already expanded
Moreover, the main distribution position contact does not have good installation conditions. The fault triggering accuracy is greatly affected by the level of construction personnel. The actual reported signal is not reliable. In most cases, it is not trusted by engineering personnel. Therefore, the fault judgment is useless. The actual use effect is not ideal

Method used

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  • A Fault Diagnosis Method for Main Pressure Distribution Valve of Hydraulic Turbine Governor
  • A Fault Diagnosis Method for Main Pressure Distribution Valve of Hydraulic Turbine Governor
  • A Fault Diagnosis Method for Main Pressure Distribution Valve of Hydraulic Turbine Governor

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the drawings. The following embodiments are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.

[0021] In the prior art, the governor main pressure distribution valve control loop is that the governor controller sends the proportional servo valve control signal to the proportional servo valve, the proportional servo valve outputs the control signal to drive the main pressure valve, and the main pressure valve then Actuate the servomotor to realize the control function. During actual use, the main pressure valve is prone to jamming and other abnormal actions due to problems such as oil viscosity, impurity particles, and wear.

[0022] Through analysis, it can be seen that the input and output of the main pressure valve are closely related. The input and output voltage signals are equal in vol...

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Abstract

A fault diagnosis method for a main distributing valve of a hydraulic turbine governor, a fault diagnosis device and a computer storage medium, said fault diagnosis method comprising: acquiring a proportional servo valve feedback signal, a main distributing valve position feedback signal and a servomotor travel feedback signal; and determining, according to the proportional servo valve feedback signal, the main distributing valve position feedback signal and the servomotor travel feedback signal, whether the main distributing valve of the hydraulic turbine governor fails and / or the type of the failure. Said method achieves accurate and timely determination, has a comprehensive basis for determination, and can accurately determine location of a failure and give a corresponding maintenance decision.

Description

Technical field [0001] The invention relates to the technical field of control of a main pressure distribution valve of a hydraulic turbine governor, in particular to a fault diagnosis method for a main pressure distribution valve of a hydraulic turbine governor. Background technique [0002] The hydraulic turbine governor is an important equipment of a hydroelectric power plant. It is responsible for the task of adjusting the turbine speed and controlling the output. The main pressure valve is one of its most important actuators. The governor uses an electro-hydraulic converter proportional servo valve. The electrical signal is converted into the oil pressure direction and flow signal, which is amplified by the main pressure distribution valve to operate the guide vane servomotor. The main pressure valve is easy to jam due to oil viscosity, impurity particles, abrasion and other problems during actual use. The working condition of the main pressure valve directly affects the ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/003G05B23/02
Inventor 张雷蔡卫江孙延岭何林波荣红
Owner NARI TECH CO LTD
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