Ground grid current monitoring method based on non-magnetic core sensing array

A sensor array and current monitoring technology, which is applied in the direction of only measuring current, voltage/current isolation, measuring current/voltage, etc., can solve problems that affect the safety of equipment operation, inconvenience users, and serious economic losses

Active Publication Date: 2021-06-25
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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  • Ground grid current monitoring method based on non-magnetic core sensing array
  • Ground grid current monitoring method based on non-magnetic core sensing array
  • Ground grid current monitoring method based on non-magnetic core sensing array

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Embodiment Construction

[0032] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0033] Such as figure 1 As shown, the switch cabinets in the existing 10-35kV switchgear in the existing substation are usually connected in rows, and the ground wires of the equipment in the cabinets are all connected to the primary ground wire (copper row) in parallel, and the primary ground wire (copper row) is connected to the cable The ditch is connected to the grounding flat iron in the switch room, and the main ground network formed by the grounding flat iron is connected to the grounding body in the station. This connection method can guide lightning waves into the ground.

[0034] According to the above electrical connection method, when the lightning current invades the switch room through the feeder, the arrester acts to make the lightning wave flow into the primary ground wire, and the sensor array without magnetic core will b...

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Abstract

The invention relates to an earth screen current monitoring method based on a non-magnetic core sensing array. The non-magnetic-core sensing array is installed at the joint of a primary ground wire and grounding flat iron in a switch chamber so as to detect the current value in lightning waves; wherein the non-magnetic core sensing array comprises a printed circuit board, a ground screen copper bar arranged on the printed circuit board, and a magnetic field sensor which is arranged on the printed circuit board and is arranged around the ground screen copper bar. The device can effectively monitor the lightning stroke generation area and whether lightning waves invade the switch room or not, and research the influence of conventional faults on the ground grid.

Description

technical field [0001] The invention belongs to the field of electric power measurement, and in particular relates to a ground grid current monitoring method based on a sensor array without a magnetic core. Background technique [0002] With the continuous development of society, the power system has been widely used in my country's industrial production and daily life. Electric energy has become the main energy and power of 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, the improvement of substation automation has brought about increasingly prominent electromagnetic problems. At the same time, the land acquisition of substations and outlet corridors has become more and more difficult, and the grounding conditions have become mo...

Claims

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Application Information

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Patent Type & Authority Applications(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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