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On-line detection loop, system and method for insulation of high-low voltage electrical equipment

A technology for electrical equipment and detection loops, which is used in the field of repeated grounding power systems and insulation on-line detection loops of high and low voltage electrical equipment. Effect

Pending Publication Date: 2020-04-10
天津安源科技发展有限公司
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Problems solved by technology

However, there are shunt and circulation problems in the partial discharge detection technology of the repeated grounding system, which makes the partial discharge detection technology unable to be applied in this system

Method used

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  • On-line detection loop, system and method for insulation of high-low voltage electrical equipment
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  • On-line detection loop, system and method for insulation of high-low voltage electrical equipment

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Embodiment Construction

[0032] In order to better understand the present invention, the present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0033] first:

[0034] Such as figure 1 with figure 2 As shown, the present invention provides an on-line detection circuit for the insulation of high and low voltage electrical equipment. The detection circuit is installed in the primary circuit of the electrical equipment to be tested. The primary circuit is a repeated grounding power system. A high-frequency pulse current sensor is connected to the loop to detect the high-frequency pulse signal in the primary loop.

[0035] One end of the primary circuit is a power supply, the other end is connected to electrical equipment, and one end of the electrical equipment is repeatedly grounded. In a system with repeated grounding, if the high-frequency current signal in the grounding loop is detected, problems of shunt and circulation will occur. ...

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Abstract

The invention provides an on-line detection loop, system and method for insulation of high-low voltage electrical equipment. A partial discharge detection loop of a repeated grounding power system isinstalled in a primary loop of electrical equipment to be detected, the primary loop is the repeated grounding power system, and a high-frequency pulse current sensor is connected into a single-phaseor three-phase loop of the primary loop to detect a high-frequency pulse signal in the primary loop; and when the high-frequency pulse current sensor is connected into a three-phase loop of the primary loop, a ground wire reversely penetrates into the high-frequency pulse current sensor. According to the invention, the problem of shunting and circulating current detection of a partial discharge detection technology in the repeated grounding power system is solved, so that the partial discharge detection technology can be applied to enterprise-level 400V, 6KV, 10KV and 35KV power systems, and the application range of the partial discharge detection technology is enlarged. Meanwhile, the development trend of insulation is predicted through an insulation prediction algorithm of the partial discharge capacity change rate, and the detection precision and applicability of partial discharge are improved.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of electrical insulation, in particular to an on-line detection circuit, system and method for the insulation of high and low voltage electrical equipment, and the technology is applied to a repeated grounding power system. Background technique [0002] In recent decades, with the rapid economic development and the steady advancement of industrial modernization, large-scale industrial and mining enterprises have higher and higher requirements for the stability of power systems, especially for oil, petrochemical, steel, pharmaceutical, and advanced manufacturing industries. For industries with strong requirements, the stability of the power system plays an important role in the stable operation of enterprises. In the power system, the damage of the insulation of electrical equipment will cause the short circuit of the equipment, which is the main reason for the fluctuation of the power s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
CPCG01R31/1272
Inventor 田付强肖建张良国萧一凡
Owner 天津安源科技发展有限公司
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