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An Online Monitoring Method for Turbine Load Fluctuation by Adjusting Steam Valve Jamming Judgment

A technology that adjusts valve and load fluctuations. It is used in engine starting, machine/engine, mechanical equipment, etc. It can solve problems such as generator power fluctuation, oscillation, divergence, etc., to improve safety and stability, prevent abnormal shutdown or cause The effect of low frequency oscillation of power grid

Active Publication Date: 2018-06-22
ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the response of other valves is positively coupled with the abnormal action of the faulty valve, it will cause fluctuations, oscillations or even divergence of the generator power

Method used

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  • An Online Monitoring Method for Turbine Load Fluctuation by Adjusting Steam Valve Jamming Judgment

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Experimental program
Comparison scheme
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Embodiment 1

[0019] Embodiment 1: An online monitoring method for steam turbine load fluctuations for adjusting the determination of steam valve jamming, the method includes the following steps:

[0020] Step 1. Obtain the relationship between the oil motor stroke and the valve opening of the steam turbine regulating valve through a static test;

[0021] Step 2. Real-time monitor the operating status of the steam turbine regulating valve through the bad quality judgment function of the DEH system to ensure that the control command and actual feedback are true and accurate. If it is judged to be in good condition, perform step 3. Otherwise, end the judgment and give an alarm;

[0022] Step 3, obtain the position command of the regulating valve in real time, and obtain the opening degree command sent by the DEH system to each regulating valve in real time through the DEH system;

[0023] Step 4, obtain the actual stroke opening of the regulating valve in real time, and obtain the actual stro...

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PUM

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Abstract

The invention discloses an online monitoring method of turbine load fluctuation for jamming judgment of an adjusting valve. The online monitoring method comprises the following six steps of: (a) acquiring relationship between the stroke of an oil-driven machine and the openness of a valve of the adjusting valve of a turbine; (b) monitoring the operating state of the adjusting valve of the turbine in real time; (c) acquiring a position instruction of the adjusting valve in real time; (d) acquiring actual stroke openness of the adjusting valve in real time; (e) comparing the position instruction and the actual stroke openness of the adjusting valve, and judging whether jamming is caused; and (f) if the jamming is caused, alarming immediately to prevent the turbine load fluctuation from causing accidents of a unit or a power grid. The online monitoring method disclosed by the invention has the advantages that the in-advance prejudgment for the turbine load fluctuation accident can be realized, so that the safety and the stability of the unit and the power grid can be improved.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation, and in particular relates to an on-line monitoring method for steam turbine load fluctuations for adjusting steam valve jamming judgment. Background technique [0002] The study found that the abnormal fluctuation of the load of the turbo-generator unit is one of the main causes of the low-frequency oscillation of the power grid. It is an important means to ensure the safe and stable operation of the power grid to detect and suppress the abnormal load fluctuation of the turbo-generator set as early as possible. [0003] There are many reasons for the abnormal fluctuation of the load of the turbogenerator set, and the jamming of the adjustment gate under the power closed-loop control is an important reason. Under normal circumstances, the power closed-loop control loop will adjust each regulating valve to stabilize the generator power adjustment at the target value. When a key i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D19/00F01D21/00
CPCF01D19/00F01D21/00
Inventor 文贤馗钟晶亮邓彤天王家胜王锁斌
Owner ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD