Hydropower station unit temperature out-of-limit protection method

A technology for hydropower stations and units, applied in emergency protection circuit devices, emergency protection devices for automatic disconnection, electrical components, etc., can solve problems such as non-stopping of units, sudden changes in signals, and inability to accurately judge the temperature change of units, and achieve comprehensive logic Effect

Pending Publication Date: 2022-07-29
HUANENG GRP R&D CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, during the normal operation of the unit connected to the grid, the temperature measuring thermal resistance element is easily affected by external interference, loose wiring, card failure and other factors, resulting in a sudden signal change. , thus affecting the normal and safe production of the unit
Therefore, the existing temperature protection method alone cannot accurately judge the temperature changes of all units, and further optimization is needed

Method used

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  • Hydropower station unit temperature out-of-limit protection method
  • Hydropower station unit temperature out-of-limit protection method
  • Hydropower station unit temperature out-of-limit protection method

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Embodiment Construction

[0029] The present invention will be further described below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0030] like image 3 As shown in the figure, a temperature over-limit protection method for a hydropower station unit is applied to the temperature protection system of the unit by combining the temperature over-limit judgment logic with the state judgment of whether the outlet circuit breaker of the unit is closed, so as to determine whether the unit system enters the temperature protection logic. Make a judgment, which includes the following steps:

[0031] S1. Set the temperature to an ultra-high fixed value Ti_HH and collect the real-time temperature Ti of the i-th line of the unit.

[0032] S2. Determine the over-limit state of the i-th temperature, if it is over the limit, go to step S3, and if it is normal, go to step S4.

[0033] S3. Determine whether the breaker at the outlet of...

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Abstract

The invention relates to a hydropower station unit temperature out-of-limit protection method, which optimizes a temperature out-of-limit judgment process, makes the judgment more comprehensive and accurate, and judges the process of the next action of a unit by combining a temperature out-of-limit state with a state of whether a unit outlet circuit breaker is closed or not, so as to realize the overall optimization of the temperature out-of-limit protection method. And the risk of tile burning caused by temperature rise and the possibility of abnormal shutdown of a unit caused by sudden temperature change can be avoided.

Description

technical field [0001] The invention relates to the technical field of automatic monitoring of hydropower generation, in particular to a temperature over-limit protection method for a hydropower station unit. Background technique [0002] In the temperature protection configuration of the existing hydropower station units, the temperature over-limit protection usually adopts such as figure 1 The method flow shown is carried out, the real-time temperature of any channel of the unit is collected, and when the collected temperature Ti of the i-th channel is greater than the temperature ultra-high fixed value Ti_HH, the i-th channel is over-temperature alarmed, and the unit temperature protection logic is entered. Among them, the ultra-high temperature fixed value Ti_HH is comprehensively set in combination with the position of the bearing bush of the unit, normal operating conditions, etc., and is generally much higher than the normal operating temperature of the unit. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H5/04H02H7/06
CPCH02H5/042H02H7/06
Inventor 叶剑杨欢舒浩范小波朱在兵金存义
Owner HUANENG GRP R&D CENT CO LTD
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