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Method for monitoring important parameter change rate and giving alarm in advance

A technology of change rate and parameter change, applied in the direction of comprehensive factory control, instrumentation, comprehensive factory control, etc., can solve the problems of large hysteresis, increase the intensity of operating personnel to monitor disks, and poor real-time performance, and achieve the effect of avoiding non-stop

Pending Publication Date: 2020-05-19
THERMAL POWER TECH RES INST OF CHINA DATANG CORP SCI & TECH RES INST +1
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Problems solved by technology

[0003] Usually the operator checks the temperature within 10 minutes by invoking the historical trend of the parameters, and then calculates the rate of change manually. This traditional method has a large lag and poor real-time performance, and it also increases the operator’s monitoring time. strength

Method used

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  • Method for monitoring important parameter change rate and giving alarm in advance
  • Method for monitoring important parameter change rate and giving alarm in advance

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Embodiment Construction

[0011] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0012] ginseng figure 1 As shown, this embodiment provides a method for monitoring the rate of change of important parameters and giving an early warning, including:

[0013] Step S1, based on the DCS control system, obtain the difference between the current value of the monitored important parameter and the parameter value before T time, and obtain the parameter value within T time based on the difference between the obtained current value of the important parameter and the parameter value before T time rate of change;

[0014] Step S2, comparing the obtained rate of change with the preset rate of change, if the obtained rate of change exceeds the preset rate of change,...

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Abstract

The invention relates to a method for monitoring important parameter change rate and giving an alarm in advance. The method comprises the following steps: step 1, obtaining a difference value betweenthe current value of a monitored important parameter and the parameter value before T time based on a DCS control system, and obtaining the change rate of the parameter in the T time based on the obtained difference value between the current value of the important parameter and the parameter value before T time; and step 2, comparing the obtained change rate with a preset change rate, if the obtained change rate exceeds the preset change rate, judging that the change rate of the important parameter is abnormal, and giving an alarm prompt. The monitored parameter change rate within a certain period of time is calculated in real time through a logic configuration method, an alarm is given in advance to inform the operator, the operation parameters are adjusted in time and non-stop of the operation unit can be avoided.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation, and in particular relates to a method for monitoring the change rate of important parameters and giving an early warning. Background technique [0002] There are certain requirements for changes in the rate of some parameters during the operation of thermal power units, such as the main steam temperature. During the operation of the unit, if the temperature of the main steam drops by 50 degrees within 10 minutes, the cylinder temperature of the steam turbine will drop too quickly after being cooled by the steam that is too low. , resulting in uneven thermal deformation of the steam turbine. In severe cases, the steam may carry water, causing the water impact of the steam turbine. Therefore, the operating personnel must manually open the brake in time to avoid damage to the equipment. [0003] Usually the operator checks the temperature within 10 minutes by invoking the historical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCG05B19/41845G05B2219/33273Y02P90/02
Inventor 朱邦那王凯民李海军杨峰王志良于春辉程利平张俊伟金鑫高宝宏戴祎张继伟
Owner THERMAL POWER TECH RES INST OF CHINA DATANG CORP SCI & TECH RES INST
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