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Method and device for determining operating state of relay protection device

A relay protection device and operating state technology, which is applied to emergency protection circuit devices, emergency protection device components, emergency protection data processing devices, etc., can solve the problems of insufficient accuracy of the operation state analysis of relay protection devices, etc.

Active Publication Date: 2021-01-22
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 operating state of relay protection device
  • Method and device for determining operating state of relay protection device

Examples

Experimental program
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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

The invention discloses a method and a device for determining an operating state of a relay protection device. The method comprises the steps of: acquiring feature index sequences of a to-be-detectedrelay protection device at different observation moments, decoding a pre-constructed hidden Markov model through employing a Viterbi algorithm based on the feature index sequences to obtain an optimaloperation state sequence; and outputting the optimal operation state sequence, wherein the pre-constructed hidden Markov model is obtained by training through adopting a fusion algorithm of a simulated annealing algorithm and a Baum-Welch algorithm. According to the method and the device provided by the embodiment of the invention, the continuous hidden Markov model is used for analyzing the operating state of the relay protection device, so that the comprehensive analysis and detection of the operation state fusing the current and historical information can be realized, the comprehensive description of the operating state process of the relay protection device is realized, and the operation state analysis accuracy of the relay protection device is greatly improved.

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 Applications(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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