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Power switch device operation time prediction equipment and method

A technology of action time and power switch, applied in the direction of electric switch, high-voltage/high-current switch, emergency protection data processing device, etc., can solve the problem of increasing the amount of calculation, and achieve the effect of improving the accuracy of estimation

Active Publication Date: 2013-10-02
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the operating characteristic parameter estimation mechanism included in the operating time prediction device and method in the conventional power switching device as described above, there is a problem that it is difficult to adjust the calculation time without increasing the calculation time according to changes in ambient temperature, changes with time, and the like. Quantitatively and stably estimate operating characteristic parameters

Method used

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  • Power switch device operation time prediction equipment and method
  • Power switch device operation time prediction equipment and method
  • Power switch device operation time prediction equipment and method

Examples

Experimental program
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Embodiment approach 1

[0023] figure 1 It is a block diagram showing the configuration of the operating time prediction device of the power switching device (circuit breaker 1 ) according to Embodiment 1 of the present invention. refer to figure 1 , the action time prediction device and method will be described.

[0024] The circuit breaker 1 is a power switching device of a main circuit 100 and includes various sensors 2 to 6 and a controller 200 . The circuit breaker 1 includes a current sensor 2 , an operating stroke sensor 3 , a temperature sensor 4 as an operating environment condition measuring unit 21 , a control voltage sensor 5 , and a pressure sensor 6 . The current sensor 2 measures the main circuit current and outputs the main circuit current signal 7 representing the main circuit current to the operating time measuring unit 13, and the operating stroke sensor 3 measures the operating stroke of the contacts of the circuit breaker 1 and indicates the movement of the operating stroke. T...

Embodiment approach 2

[0063] Figure 4 It is a figure which shows the structure of Embodiment 2 of this invention. In this embodiment, the feedback correction unit 24 in the first embodiment is replaced with a variable feedback correction unit 30, and the second prediction error 42 is further reduced.

[0064] Compared with the feedback correction unit 24, the variable feedback correction unit 30 further corrects the following error, which is estimated due to the time-dependent change of the circuit breaker (the operating time gradually changes due to the contact loss of the circuit breaker, etc.). An offset error in the first predicted action time 20 occurs as a result of the action characteristic parameter 18 being different from the latest action history.

[0065] Figure 5 It is a figure which shows the example of the temporal change of the circuit breaker 1. Figure 5 The two curves in represent the time-dependent changes for two circuit breakers. Furthermore, the slopes of Examples 1 and ...

Embodiment approach 3

[0083] Figure 8 It is a figure which shows the structure of Embodiment 3 of this invention. The configuration of the present embodiment does not include the nearby movement history data extracting unit 15 in the first embodiment, and instead of the feedback correcting unit 24 , a variable feedback correcting unit 30 is provided as in the second embodiment.

[0084] Also in the present embodiment, the second prediction error 42 can be reduced by using the variable feedback correcting means 30 as in the second embodiment, so that individual differences in the amount of fluctuation and the rate of change over time can be considered for each circuit breaker, and the improvement can be improved. Prediction accuracy of action times. In addition, it is possible to automatically follow changes in the amount of fluctuation or the rate of change over time that occur during operation, thereby improving the prediction accuracy of the operating time.

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Abstract

Provided is equipment with which, when the ambient temperature at which a power switch device is used changes or the device experiences changes over time, etc., operation characteristics parameters can be deduced in a stable manner without increasing the amount of calculation and operation time can be predicted with high accuracy, even under conditions in which it is difficult to deduce the operation characteristics parameters with high precision and in a stable manner. Power switch device operation time prediction equipment, wherein the accuracy of predicting operation time can be improved by a vicinity operation history data extraction means which extracts and inputs, as operation history data to be used by an operation characteristics parameter deduction means, only operation history data relating to the vicinity of the current operation environment conditions.

Description

technical field [0001] The present invention relates to a device and method for predicting operating time in power switching devices such as circuit breakers. Background technique [0002] In power switching devices such as circuit breakers, an operating time prediction device for predicting and controlling operating time is known. For example, in Patent Document 1, as an operating time prediction device and method in a power switching device such as a circuit breaker, the following is disclosed: when the circuit breaker is opened or closed, the operating time and environmental conditions are stored, and the history (history ) to perform function approximation to estimate the action characteristic parameters, and predict the next action time according to the estimated action characteristic parameters and the current environmental conditions. [0003] On the other hand, since SF6 gas generally used in circuit breakers has the property of freezing in a low-temperature region,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/00H01H33/59
CPCH01H9/56H01H33/593H01H2009/566H02H1/0092
Inventor 小林翔一蔦田广幸鹿井正博森智仁
Owner MITSUBISHI ELECTRIC CORP