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Speed controller proportional valve median adjusting method based on hydraulic slave system static balance

A follow-up system and static balance technology, applied in the direction of control system type, engine control, engine components, etc., to achieve fast speed, wide applicability, accurate and reliable results

Active Publication Date: 2018-08-31
CHINA YANGTZE POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method aims to accurately determine the neutral position of the proportional valve of the governor, and solve the adjustment quality problem of the hydraulic servo system of the governor caused by the inaccurate setting of the proportional valve neutral position of the governor.

Method used

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  • Speed controller proportional valve median adjusting method based on hydraulic slave system static balance
  • Speed controller proportional valve median adjusting method based on hydraulic slave system static balance
  • Speed controller proportional valve median adjusting method based on hydraulic slave system static balance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0060] Take the median adjustment of the proportional valve of a unit governor in Xiangjiaba Hydropower Station as an example:

[0061] This section takes the neutral position adjustment of the governor proportional valve of a certain unit of Xiangjiaba Hydropower Station as an example to illustrate the application of the static balance principle of the hydraulic servo system in the neutral position adjustment of the governor proportional valve. This method can be widely used in the use of proportional valves. , or proportional valve + stepping motor and other redundant configurations, together with the main distribution and servomotor as the hydraulic turbine generator set in the form of an actuator.

[0062] During the test of the governor without water, the control mode of the governor of a certain unit of Xiangjiaba Hydropower Station was changed to A set of controller online, electric manual operation mode, proportional valve and main distribution, servomotor as the actuat...

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Abstract

Provided is a speed controller proportional valve median adjusting method based on hydraulic slave system static balance. The method comprises: step 1, keeping given power of a unit speed controller in a grid connected power mode constant, or switching a speed controller to an electric manual state, to make a speed controller hydraulic slave system in static balance; step 2, a speed controller electrical control system acquiring main distribution position feedback M, main distribution position set Mset data; determining whether the main distribution position feedback M is equal to the main distribution position set Mset; if M<Mset, using the highest unit precision i of a proportional valve median set value as step length, gradually increasing the proportional valve median set value B0, returning to the step 2; if M>Mset, using i as the step length, gradually reducing the proportional valve median set value B0, returning to the step 2; if the main distribution position feedback M is equal to the main distribution position set Mset, the B0 value being a proportional valve actual median value B0actual, an adjusting process ending. The method can accurately determine the speed controller proportional valve median, and solves a problem of adjusting quality of a speed controller hydraulic slave system caused by inaccurate setting of the speed controller proportional valve median.

Description

technical field [0001] The invention relates to a method for adjusting the neutral position of a proportional valve of a governor, in particular to a method for adjusting the neutral position of a proportional valve of a governor based on the static balance of a hydraulic servo system. Background technique [0002] Currently, the proportional valve (or redundant configuration such as proportional valve + stepping motor) is used together with the main distribution and the servomotor as the governor of the hydro-generator unit in the form of the actuator. The setting of the neutral position of the proportional valve is usually done through manual experimentation, with a certain step length, the set value of the proportional valve is increased and decreased back and forth, and the critical point at which the guide vane starts to increase and decrease is determined, and the proportional valve at this time is recorded. Take the average value of the median setting value as the med...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B15/00
CPCF03B15/00F05B2270/402F05B2270/604Y02E10/20
Inventor 涂勇帅小乐池成虎皮萃刘欢杨刚卢舟鑫罗崇洋黄小波
Owner CHINA YANGTZE POWER
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