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Method for obtaining effective data from turbine actuator parameter measured data

A technology of actuators and measured data, applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve problems such as heavy workload, long time consumption, and affecting the efficiency and accuracy of steam turbine parameter identification, so as to improve efficiency and effect, The effect of improving efficiency and accuracy

Active Publication Date: 2014-08-13
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of data and the subjectivity of manual observation, it often leads to a large workload and long time-consuming consequences
Even so, the obtained data is still doped with a large amount of invalid data, which seriously affects the efficiency and accuracy of steam turbine actuator parameter identification

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] (1), curve fitting: adopt the least square method, carry out conventional fitting operation to the measured data of steam turbine actuator parameters, obtain the smooth data curve of the measured data of the steam turbine actuator parameters;

[0012] (2), Differential processing: Carry out conventional differential operation to the smooth data curve gained in step (1), obtain the data v after the differential processing of the measured data of the above-mentioned steam turbine actuator parameters, the physical meaning of the data v after the differential processing of the gained is each time point The corresponding actuator action speed;

[0013] (3), threshold judgment: set the action speed threshold of the steam turbine actuator to be v 0 , using the threshold v 0 The following judgments are made for each differentially processed data v obtained in step (2): v>v 0 , belonging to the effective data section of the steam turbine actuator to open the step action test, ...

Embodiment 2

[0016] Steps (1)~(2) are with embodiment 1;

[0017] (3), threshold judgment: set the action speed threshold of the steam turbine actuator to be v 0 , using the threshold v 0 The following judgments are made for each differentially processed data v obtained in step (2): v0 , belonging to the effective data section of the step action test of the steam turbine actuator closing, record the start and end time of this section as t 2 , t 2 ';

[0018] (4), select effective data section: to step (3) gained t 2 Subtract 1 second from the value of 2 ' value plus 1 second. Income (t 2 -1), (t 2 '+1) The original measured data in the time zone, including all valid data of the closing step action test of the steam turbine actuator.

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Abstract

The invention discloses a method for obtaining effective data from turbine actuator parameter measured data. The method comprises the following steps: (1) obtaining a smooth data curve through curve fitting; (2) obtaining data v subjected to differential processing through differential processing; (3) performing threshold judging on the data v subjected to differential processing; and (4) selecting effective data segments. By means of the method, curve fitting, differential processing and threshold judgment are performed sequentially in actual measurement of parameters of a turbine actuator, and the effective data in the turbine actuator parameter measured data can be accurately and effectively obtained, so that effectiveness and effect of effective data obtaining in the turbine actuator parameter actual measurement can be improved, efficiency and accuracy of parameter identification of the turbine actuator are improved, and stability analyzing calculation of a power grid is facilitated.

Description

technical field [0001] The invention belongs to the technical field of steam turbines, in particular to the actual measurement, identification and modeling of the parameters of the steam turbine actuators, in particular to a method for obtaining effective data from the actual measurement data of the parameters of the steam turbine actuators. Background technique [0002] The actuator is an important link in the steam turbine model. Therefore, the implementation of parameter measurement, identification and modeling for this part of the steam turbine is an essential step to establish an accurate steam turbine model, which is of great significance to the stability analysis and calculation of the power grid. Generally speaking, the actual measurement of the parameters of the actuator of the steam turbine is completed through the step test of the actuator. The effective data for identification that can be obtained by using this method is only the data of the step opening and step...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D17/10
Inventor 朱晓星盛锴寻新
Owner STATE GRID HUNAN ELECTRIC POWER
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