A Ground Grid Current Monitoring Method Based on Coreless Sensing Array

A sensing array and current monitoring technology, applied in the direction of only measuring current, measuring current/voltage, voltage/current isolation, etc., can solve problems such as affecting the safety of equipment operation, serious economic losses, and user inconvenience

Active Publication Date: 2022-06-03
STATE GRID FUJIAN ELECTRIC POWER CO LTD +1
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Problems solved by technology

[0004] In the southern region where lightning occurs frequently, when the substation is attacked by lightning, lightning strikes through the primary / lightning protection equipment and then flows into the ground network, resulting in lightning counterattack accidents, which greatly affects the operation safety of equipment
Power outages caused by lightning strikes not only cause inconvenience to users, but also often cause damage to equipment in the station, resulting in serious economic losses

Method used

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  • A Ground Grid Current Monitoring Method Based on Coreless Sensing Array
  • A Ground Grid Current Monitoring Method Based on Coreless Sensing Array
  • A Ground Grid Current Monitoring Method Based on Coreless Sensing Array

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Embodiment Construction

[0032] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] like figure 1 As shown in the figure, the 10~35kV switchgear in the existing substation is usually connected in an arrangement, and the grounding wires of the equipment in the cabinet are connected to the primary grounding wire (copper bar) in parallel, and the primary grounding wire (copper bar) is connected to the cable. The ditch is connected with the grounding flat iron in the switch room, and the main ground network formed by the grounding flat iron is connected with the grounding body in the station. This connection method can lead the lightning wave into the earth.

[0034] According to the above-mentioned electrical connection method, when the lightning current penetrates into the switch room through the feeder, the arrester acts to make the lightning wave flow into the primary ground wire. The connection between irons is used...

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Abstract

The invention relates to a ground grid current monitoring method based on a sensor array without a magnetic core. Install the non-magnetic core sensing array on the connection between the primary ground wire and the grounding flat iron in the switch room to detect the current value in the lightning wave; the non-magnetic core sensing array includes a printed circuit board, located on the printed The ground grid copper bar on the circuit board, and the magnetic field sensor arranged on the printed circuit board and ringed around the ground grid copper bar. The invention can effectively monitor the area where the lightning strike occurs and whether the lightning wave invades the switch room, and can study the influence of conventional faults on the ground network.

Description

technical field [0001] The invention belongs to the field of electric power measurement, in particular to a ground grid current monitoring method based on a non-magnetic core sensing array. Background technique [0002] With the continuous development of society, the power system has been widely used in industrial production and daily life in my country. Electric energy has become the main energy and power for modern industrial production. Ensuring high-quality and stable power supply is one of the priorities of power companies. . [0003] Grounding is the basis for ensuring the reliable operation of the power system and personal safety. With the development of large-capacity power grids in my country, electromagnetic problems have become increasingly prominent due to the improvement of the automation of substations. At the same time, the land acquisition of substations and outlet corridors has become more and more difficult, and the grounding conditions have become more and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00G01R15/18G01R29/08
CPCG01R19/0092G01R29/0842G01R15/181
Inventor 项宇锴叶杰黄鸿标叶桂中陈苏芳林桥玉郑茂华肖荣洋翁先福吕阳星吴勇海
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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