Cable insulation condition monitoring method and system based on QGA-VMD

A cable insulation and monitoring system technology, applied in the direction of gene model, genetic rule, test dielectric strength, etc., can solve problems such as limitation, spectrum leakage, error, etc., to achieve the effect of improving efficiency, ensuring safe operation, and reducing maintenance costs

CN114384377APending Publication Date: 2022-04-22TAIYUAN XIANGMING INTELLIGENT CONTROL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2022-04-22

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Abstract

The invention discloses a cable insulation condition monitoring method and system based on QGA-VMD, and belongs to the technical field of cable insulation condition monitoring. The technical problem to be solved is to provide the improvement of the cable insulation condition monitoring method based on the QGA-VMD. According to the technical scheme, the method comprises the following steps: sampling original voltage and original current of a cable through a sampling circuit, and carrying out preliminary filtering processing on the collected original voltage and current data; a penalty factor and a decomposition mode number in the variational mode decomposition algorithm are optimized by using a quantum genetic algorithm, and an optimized QGA-VMD algorithm is obtained; performing signal decomposition on the obtained voltage and current signals through an optimized QGA-VMD algorithm, and extracting a voltage fundamental component and a current fundamental component of which the frequencies are close to the power frequency; calculating the extracted voltage fundamental component and current fundamental component by using a sine wave parameter method to obtain a dielectric loss factor; the method is applied to cable insulation monitoring.
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Description

technical field

[0001] The invention discloses a QGA-VMD-based cable insulation condition monitoring method and system, belonging to the QGA-VMD-based cable insulation condition monitoring method and system technical field. Background technique

[0002] The coal mine fully mechanized mining power system contains a large number of capacitive equipment, such as insulating bushings, coupling capacitors, power cables, insulating rods, capacitors, etc. The insulation status of capacitive equipment is directly related to the operating status of electrical equipment and the power grid. Quality of power supply and security of power supply. According to the statistics of the power department, most of the electrical equipment damage is caused by the aging of equipment insulation, which leads to functional failure. Therefore, timely and effective monitoring of equipment insulation status is of great significance to the normal operation of electrical equipment and the safe and high-qual...

Examples

Embodiment Construction

[0048] like Figure 1 to Figure 4 As shown, the present invention relates to a high-precision QGA-VMD-based cable insulation condition monitoring method and system, which can be applied to high voltage field; waveform analysis, filter processing field; on-line insulation monitoring field and insulation fault diagnosis field.

[0049] like figure 1 Shown is the flow chart of the present invention based on the QGA-VMD fully mechanized mining cable insulation condition monitoring method, mainly comprises the following steps:

[0050] S1: Use a sampling circuit composed of voltage transformers and current transformers to sample the original voltage and original current, and perform preliminary filtering processing;

[0051] S2: Utilize the quantum genetic algorithm (QGA) to optimize the penalty factor α and the number of decomposition modes K in the variational mode decomposition algorithm (VMD), and obtain the optimized algorithm QGA-VMD; specifically include the following steps: ...