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A Partial Discharge Characteristic Parameter Extraction Method Based on Recursive Filtering Algorithm

A partial discharge and characteristic parameter technology, applied in the direction of measuring electricity, measuring electrical variables, complex mathematical operations, etc., can solve problems such as difficult to meet requirements, insufficient performance of embedded systems, and reduce the amount of calculations, so as to simplify the amount of calculations and solve problems. Insufficient floating-point computing power and the effect of simplifying the calculation process

Active Publication Date: 2019-03-26
吴笃贵 +1
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Problems solved by technology

[0004] The extraction of probabilistic discharge intensity is generally obtained by probabilistic analysis of data per unit time, but this calculation method needs to store all data per unit time and complete a large number of calculations in real time
At present, the embedded systems commonly used in monitoring terminal equipment are difficult to meet the requirements in terms of memory space and floating-point computing capabilities.
Therefore, a new probability intensity extraction method is proposed here, and the probability discharge intensity is obtained in a recursive manner. It does not need to save data, and can greatly reduce the amount of calculation to solve the problem of insufficient performance of the current embedded system.

Method used

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  • A Partial Discharge Characteristic Parameter Extraction Method Based on Recursive Filtering Algorithm
  • A Partial Discharge Characteristic Parameter Extraction Method Based on Recursive Filtering Algorithm
  • A Partial Discharge Characteristic Parameter Extraction Method Based on Recursive Filtering Algorithm

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Embodiment Construction

[0022] A method for extracting characteristic parameters of partial discharge based on a recursive filtering algorithm, comprising the following steps:

[0023] Step 1: The newly obtained discharge pulse amplitude G k and the probability intensity value Z obtained recursively before k-1 For comparison, if G k k-1 , then no operation is performed, only Z k-1 The value passed to Z k , namely Z k = Z k-1 ;

[0024] Step 2: If G k >Z k-1 , then calculate Z k =αZ k-1 +βG k , α is the recurrence factor, β is the correction factor,;

[0025] Step 3: Repeat until all the discharge pulse amplitudes per unit time are calculated. Z obtained after the recursive calculation k That is, the probability discharge intensity per unit time, which represents the maximum partial discharge value that occurs repeatedly.

[0026] Step 4: Put the Z k =αZ k-1 +βG k Expand to get:

[0027]

[0028] β is a calibration factor, which is adjusted after calculating the value of α accordi...

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Abstract

Provided is a partial discharge characteristic parameter extraction method based on a recursive filtering algorithm. An obtained discharge pulse amplitude Gk and an obtained corresponding probability strength value Zk-1 are compared, if the Gk is greater than the Zk-1, calculation is performed as shown in the description, the calculation is repeated, and Zk is obtained after recursive computation is completed, namely probability discharge strength within unit time, the maximum partial discharge value presented repeatedly is represented. The operation amount is decreased, analysis and recursion are conducted on each new data in real time, and historical data storage is not needed.

Description

technical field [0001] The invention relates to a partial discharge pulse characteristic parameter extraction method based on a recursive filtering algorithm, which is suitable for a partial discharge on-line monitoring device and belongs to the technical field of partial discharge detection of electrical equipment. Background technique [0002] By monitoring the partial discharge pulse intensity of electrical equipment and analyzing the development trend of partial discharge, it is possible to judge whether there are local defects in the insulation and the aging speed of the medium, so as to intervene in time to prevent huge losses caused by destructive discharge and ensure the stable operation of electrical equipment. is of great significance. [0003] Partial discharge is volatile, even if it is caused by the same defect, it is a phenomenon that is both volatile and stable and repeatable. Chapter 4.3.3 of "Measurement of Partial Discharge GB / T 7354-2003" points out that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/18G01R31/12
CPCG01R31/1227G16Z99/00
Inventor 吴笃贵慕鹏凯王磊闫亚飞
Owner 吴笃贵
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