Method for recognizing electrical system non-invasive induction motor dynamic parameter

An induction motor, non-invasive technology, applied in the direction of motor generator testing, etc., can solve problems such as unfavorable on-site measurement, inability to provide special test signals, time-consuming and labor-intensive, etc.

Inactive Publication Date: 2009-02-25
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) The traditional method is time-consuming and laborious, which is not conducive to on-site measurement;
[0006] 2) It is necessary to use special test signals that cannot be conveniently provided on site;

Method used

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  • Method for recognizing electrical system non-invasive induction motor dynamic parameter
  • Method for recognizing electrical system non-invasive induction motor dynamic parameter
  • Method for recognizing electrical system non-invasive induction motor dynamic parameter

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Embodiment Construction

[0035] The method for identifying dynamic parameters of a non-intrusive induction motor in a power system according to the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0036] The non-invasive induction motor dynamic parameter identification method proposed by the present invention is used in the research of accurate load modeling and parameter identification of power system, such as figure 1 with figure 2 As shown, taking the Y100L2-4 induction motor as an example, the detailed description is as follows:

[0037] The first step: without affecting the normal use of power users, monitor the electrical information of the power load, that is, use a non-invasive method to obtain the use of the induction motor of the power user and the corresponding information based on the current and voltage information at the electrical entrance of the load. If an induction motor is put into operation, record the voltage and ...

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Abstract

A dynamic parameter identifying method for electric system non-invasive induction motor, including the steps as below: under no influences to the electric user, monitor and detect the electrical information of electric loads, if any induction motors put into operation, go to the next step, otherwise continue to monitor and detect; record the terminal voltage, and current data during the whole starting process of induction motor under any loads; fulfill the filtering of measured voltage, and current data, and the data smoothing; draw the pie chart of motor according to the smoothed data; and identify the parameters of induction motor according to the basic properties of motor pie chart and combined with the modern mathematic methods to optimize the parameters, and calculate the rotary speed of motor at the steady-state operating point according to the calculated parameters; calculate the deviation indexes of parameters; determine whether the deviation indexes meet with the specified standards, until all deviation indexes up to the relevant standards. The invention adopts the non-invasive parameter identification method, only through the current, and voltage information at the electrical inlet of loads, the service conditions and relevant dynamic parameters of user's induction motor may be obtained.

Description

technical field [0001] The invention relates to a parameter identification method of an induction motor in a power system. In particular, it relates to a non-intrusive induction motor dynamic parameter of a power system in which the power supply party does not need to intrude into the interior of the power user, but can obtain the use of the power user's induction motor and the corresponding dynamic parameters based on the current and voltage information at the electrical entrance of the load. identification method. Background technique [0002] Power system dynamic simulation is an irreplaceable tool for studying the dynamic characteristics of the entire power system, and is the basis for power system design, planning, and operation. The research shows that the load dynamic parameters have an important influence on the dynamic characteristics of the power system, and the excessive roughness of the load model is one of the main factors restricting the improvement of the sim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/34
Inventor 余贻鑫黎鹏郭金川
Owner TIANJIN UNIV
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