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Method and device for determining the operating state of a relay protection device

A relay protection device, operating state technology, applied in emergency protection circuit devices, parts of emergency protection devices, emergency protection data processing devices, etc., can solve the problem of insufficient accuracy of operation state analysis of relay protection devices

Active Publication Date: 2021-03-26
CHINA ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention proposes a method and device for determining the operating state of a relay protection device, aiming to solve the problem of insufficient accuracy in analyzing the operating state of a relay protection device in the related art

Method used

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  • Method and device for determining the operating state of a relay protection device
  • Method and device for determining the operating state of a relay protection device
  • Method and device for determining the operating state of a relay protection device

Examples

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Effect test

Embodiment 1

[0160] Selecting 6 indicators of aging degree, temperature increment, working voltage deviation, sampling deviation, number of alarms, and reliability of the same type of relay protection device, 5 groups of data samples of the degradation process of a certain type of relay protection device in the whole life stage of the degradation process were obtained. The protection device is observed once a year for a total of 10 years. The state number of the device is 3, that is, healthy, abnormal, and seriously abnormal. If the protection device is in a healthy state, no maintenance is required; If the protection device is in a serious abnormal state, the performance of the device will be seriously degraded, the function of the device will be weakened, and the device will be unhealthy and must be maintained. Among them, the observed values ​​of the characteristic indexes of sample 1 and sample 2 are shown in Table 1. Training sample 1 is a device with defects, and training sample 2 i...

Embodiment 2

[0276] Selecting 6 indicators of aging degree, temperature increment, working voltage deviation, sampling deviation, number of alarms, and reliability of the same type of relay protection device, 5 groups of data samples of the degradation process of a certain type of relay protection device in the whole life stage of the degradation process were obtained. The protection device is observed once a year for a total of 10 years. The state number of the device is 3, that is, healthy, abnormal, and seriously abnormal. If the protection device is in a healthy state, no maintenance is required; If the protection device is in a serious abnormal state, the system performance will be seriously degraded, the system function will be weakened, and the system will be unhealthy and must be maintained. Among them, the observed values ​​of the characteristic indexes of sample 1 and sample 2 are shown in Table 4. Training sample 1 is a device with defects, and training sample 2 is a device wit...

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Abstract

A method and device for determining the operating state of a relay protection device, the method comprising: obtaining the characteristic index sequence of the relay protection device to be detected at different observation times, based on the characteristic index sequence, using the Viterbi algorithm to compare the pre-built The hidden Markov model is decoded to obtain the optimal running state sequence; the optimal running state sequence is output; among them, the pre-built hidden Markov model is trained by the fusion algorithm of simulated annealing algorithm and Baum-Welch algorithm. Through the method and device provided by the embodiment of the present invention, by using the continuous hidden Markov model for the analysis of the operation state of the relay protection device, the comprehensive analysis and detection of the operation state of the current and historical information can be realized, and the relay protection device can be realized. The comprehensive description of the operation state process of the electric protection device greatly improves the accuracy of the analysis of the operation state of the relay protection device.

Description

technical field [0001] The invention relates to the field of electric power system relay protection, in particular to a method and device for determining the operating state of a relay protection device. Background technique [0002] With the construction of ultra-high voltage AC-DC hybrid power grid and the access of high proportion of new energy power sources, major changes have taken place in the power structure and power grid characteristics, and the safe operation of the power grid is more dependent on secondary system equipment such as relay protection and safety automatic devices. , the device failure, failure to cause the harm of refusal to move will be more serious. At the same time, the ability of relay protection devices to collect and analyze their own status and operating data has been continuously enhanced, and the development of big data and artificial intelligence technology has laid a good foundation for the comprehensive application of various information. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H1/00
CPCH02H1/0092
Inventor 郭鹏王文焕杨国生张烈张瀚方李妍霏闫周天康逸群王丽敏胡海燕任庆雷
Owner CHINA ELECTRIC POWER RES INST
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