Determination method and system of equipment threshold value

A technology for determining methods and equipment, applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve problems such as low accuracy and weak adaptability of equipment thresholds
CN105069296AInactive Publication Date: 2015-11-18ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
Publication Date
2015-11-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The embodiment of the invention provides a determination method and system of an equipment threshold value. The method comprises the following steps: obtaining a data sample of the equipment, wherein the equipment is from the same totality; judging whether the data sample complies with normal distribution or not, and if the data sample complies with the normal distribution, determining an expectation and standard difference of the data sample; and according to the expectation and standard difference of the data sample, calculating a significant difference threshold value of the data sample, and taking the significant difference threshold value as the threshold value of the equipment. The threshold value, which is subjected to substantial change, of the equipment is effectively found out, the fault hidden dangers of various pieces of equipment can be removed in time, and the precision and the adaptability of the equipment threshold value can be improved.
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Description

technical field

[0001] The present invention relates to the technical field of electric power systems, in particular to a method and system for determining an equipment threshold. Background technique

[0002] The power system is composed of various devices, such as power transformers and current transformers, etc. The status of these devices affects the operation of the power system. In order to ensure the safe, economical and stable operation of the power system, it is necessary to regularly monitor the Local maintenance test to judge the state of each equipment, so as to eliminate the potential failure of each equipment in time. Among them, one of the keys to judge the state of each equipment is the determination of the threshold of each equipment. At present, the equipment threshold is mainly estimated based on long-term maintenance experience, and the determined equipment threshold has low accuracy and weak adaptability. Contents of the invention

[0003] In view of ...

Claims

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