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Fault arc detection method and device

A fault arc and fault detection technology, which is applied in the direction of measuring devices, fault locations, and fault detection according to conductor types, can solve problems affecting current method judgment, fault arc leakage detection, and reduce fault arc detection accuracy to improve safety. and reliability effects

Inactive Publication Date: 2021-05-07
天津市中力神盾电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, the arc characteristics of the motor loads installed in the terminal line, the arc lamp, and the normal opening and closing of the switch will continue to superimpose, which will affect the judgment of the current method and will reduce the detection accuracy of the fault arc, so it will cause a fault arc missing detection

Method used

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  • Fault arc detection method and device
  • Fault arc detection method and device
  • Fault arc detection method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] figure 1 It is a flow chart of the arc fault detection method provided by Embodiment 1 of the present invention. Such as figure 1 As shown, the arc fault detection method provided by Embodiment 1 of the present invention is used for arc fault detection of distribution lines in a power distribution system, and the detection method includes:

[0028] Step 101, determining the positions of both ends of any distribution line in the distribution system as fault arc detection points;

[0029] Step 102, acquiring current and / or voltage parameters at fault arc detection points at both ends of the distribution line;

[0030] Step 103, generating the current and / or voltage characteristics according to the obtained current and / or voltage parameters at the fault arc detection points at both ends of the distribution line;

[0031] Step 104, comparing the current and / or voltage characteristic differences at fault arc detection points at both ends of the distribution line;

[0032...

Embodiment 2

[0039] figure 2 It is a flow chart of the arc fault detection method provided by Embodiment 2 of the present invention. Such as figure 2 As shown, the arc fault detection method provided by Embodiment 2 of the present invention is used for arc fault detection of distribution lines in a power distribution system, and the method includes:

[0040] Step 201, determining the positions of both ends of any distribution line in the distribution system as fault arc detection points;

[0041] Step 202, acquiring current and / or voltage parameters at fault arc detection points at both ends of the distribution line;

[0042] Step 203, generating the current and / or voltage characteristics according to the obtained current and / or voltage parameters at the fault arc detection points at both ends of the distribution line;

[0043] Step 204, comparing the difference in current and / or voltage characteristics at fault arc detection points at both ends of the distribution line;

[0044] Step ...

Embodiment 3

[0050] Embodiment 3 of the present invention provides a method for detecting an arc fault, and the steps of the method for detecting an arc fault provided in this embodiment are the same as those in Embodiment 2.

[0051] Specifically, this embodiment takes the selection of a general road as an example, such as Figure 4 As shown, determine the positions of points A and B in the main circuit as the fault arc detection point, obtain the voltage values ​​of points A and B, and generate the time-domain characteristics of the voltages of points A and B, as shown in Figure 5 As shown, it is a waveform diagram showing the time-domain characteristics of the voltage at two points A and B. By comparing the time-domain characteristic changes of the voltage at the two points of main circuit A and B, it is analyzed whether there is a fault arc on the distribution line and the type of the fault arc.

[0052] Specifically, when a series arc fault occurs on the distribution line, the volta...

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Abstract

The invention provides a fault arc detection method. The fault arc detection method comprises the following steps of: determining two end positions of any one distribution line in a distribution system as fault arc detection points; acquiring current and / or voltage parameters at the fault arc detection points at the two ends of the distribution line; generating current and / or voltage characteristics according to the obtained current and / or voltage parameters at the fault arc detection points at the two ends of the distribution line; obtaining the current and / or voltage characteristic difference at the fault arc detection points at the two ends of the distribution line through comparison; and according to a comparison result, analyzing to obtain whether a fault arc occurs in the distribution line in the distribution system. Through the detection method, the position and the type of a fault arc can be accurately, efficiently and safely detected, so that the distribution line is always in an optimal protection state, and the safety and the reliability of the distribution system are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of electric power protection, and in particular relates to a fault arc detection method and device. Background technique [0002] In the distribution line, due to the aging of the line insulation or the loose connection of the electrical equipment, it is easy to generate a fault arc phenomenon. The fault arc is extremely harmful to the line, and it is also easy to cause an electrical fire, causing damage to people's lives and property. [0003] The existing arc fault detection methods include arc magnetic field detection, arc light detection, video image detection, infrared detection and other methods, but because these detection methods are subject to environmental interference and some interference, it is difficult to apply them in the market. [0004] At present, the widely used high-frequency current detection, low-frequency current detection, and multi-band current characteristic detection arc current ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/12
CPCG01R31/085G01R31/1272Y04S10/52
Inventor 孙巍巍
Owner 天津市中力神盾电子科技有限公司