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Method for measuring impact grounding impedance on site based on large impact current

A technology of impact grounding impedance and on-site measurement, applied in the direction of grounding resistance measurement, etc., can solve problems such as difficult on-site measurement, and achieve the effect of improving the overall safety and reliability of the project

Active Publication Date: 2015-04-29
STATE GRID CORP OF CHINA +1
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  • Abstract
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  • Claims
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Problems solved by technology

However, the field measurement is limited by conditions such as the need for a high-power impulse current generator and a large field of measurement, and the need to invest a lot of manpower and material resources. Therefore, the research of scholars at home and abroad is mostly theoretical research, which is difficult to measure on the spot.

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  • Method for measuring impact grounding impedance on site based on large impact current
  • Method for measuring impact grounding impedance on site based on large impact current

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] In order to thoroughly understand the embodiments of the present invention, the detailed structure will be set forth in the following description. Obviously, the practice of the embodiments of the invention is not limited to specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments besides these detailed descriptions.

[0026] refer to figure 1 , figure 1 It is a schematic wiring diagram of the field measurement device for the impulse grounding impedance based on the impulse large current of the present invention. The measuring device shown in the figure includes a grounding device, a moving impulse current generator, a Rogowski coil, a voltage divider, an oscilloscope and a curre...

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Abstract

The invention discloses a method for measuring impact grounding impedance on a site based on large impact current. The method comprises the following steps: wiring a current electrode, wiring an impact current generator, wiring an injection point voltage signal measuring wire, and wiring an injection point current signal measuring wire. By the method provided by the invention, a dispersing property of the impact current in soil can be really reflected, actual measurement on an impact grounding property of impedance under the large impact current can be achieved, the impact grounding impedance can be accurately measured, an impact property of a grounding body can be easily mastered, design, construction and running of lightning protection engineering can be instructed and inspected, the integral safety and the integral reliability of the engineering are improved, and the operability is good.

Description

technical field [0001] The invention relates to an impedance measurement method, in particular to an on-site measurement method of the impact grounding impedance based on the impact large current. Background technique [0002] With the rapid development of the national economy, the scale of power transmission and distribution lines and electrified railway power supply systems have become larger and more complex, coupled with abnormal climate and environmental changes in recent years, and lightning activities have become increasingly frequent, so it is very concerned about the impact of lightning strikes on system safety. endangered. Power transmission and distribution and railway and other fields continue to strengthen or pay attention to lightning protection work, and invest a lot of manpower and financial resources in the research of lightning protection technology and measures. However, lightning protection safety has not been completely resolved, both technically and ec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/20
Inventor 陈维江康鹏殷禹时卫东沈海滨李中新
Owner STATE GRID CORP OF CHINA
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