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Fault detection method for large grounding grid

A fault detection and grounding grid technology, applied in the fault location, measuring electricity, measuring devices, etc., can solve the problems of complex detection process, inability to accurately reflect the fault information of the grounding grid, etc., to achieve a simple detection process, resist interference, and improve resolution. rate effect

Active Publication Date: 2017-02-08
SHIJIAZHUANG HONGYAO ENERGY TECH
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Problems solved by technology

Since the performance of the grounding grid directly affects whether the power supply system and the power generation system can operate safely, it is necessary to ensure the safety of the grounding grid. It is necessary to stop the work of the grounding grid, and then excavate and check the grounding grid, which makes the detection process complicated, and the detected data cannot accurately reflect the fault information of the grounding grid

Method used

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  • Fault detection method for large grounding grid
  • Fault detection method for large grounding grid
  • Fault detection method for large grounding grid

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Embodiment

[0030] Embodiment A fault detection method for a large grounding grid

[0031] A fault detection method for a large-scale grounding grid in this embodiment is to apply current detection point by point to the down conductors of the whole station, and detect each grounding point one by one, so as to finally obtain the fault condition of the entire grounding grid. refer to figure 2 and image 3 , the fault detection platform used in this fault detection method is as follows:

[0032] The fault detection platform is composed of a signal source 2, a data acquisition mechanism 1 and a control terminal; the signal source 2 includes a transformer T, a current transformer CT, a contactor KM, a start switch SH, and a closing switch KH; the transformer T The primary of the contactor KM is connected to the L1 phase and L2 phase of the three-phase AC power supply through the normally open contact KM1, and the current transformer CT is connected in series with the secondary of the transf...

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Abstract

The invention relates to a fault detection method for a large-scale grounding grid. The fault detection method includes the steps of drawing, connecting circuits, carrying out definition and measurement point correspondence, carrying out power-up detection, drawing a conclusion and the like. The method can be used for carrying out accurate and safe detection on the grounding grid and ensure detection accuracy; the detecting process is easy and the detection is easy to operate. Therefore, the fault detection method is suitable for detecting the large-scale grounding grids of various power supply systems or power generation systems.

Description

technical field [0001] The invention belongs to the field of grounding grid safety, and relates to a fault detection method for a large-scale grounding grid, in particular to a fault detection method for a large-scale grounding grid. Background technique [0002] In power plants, substations, electrified railways, and communication systems, in order to ensure the safety of personnel, electric power, and electronic equipment, large-scale grounding grids need to be set up. When the current is high, the above-mentioned current will always flow back to a certain point of the substation along the overhead ground wire, then flow back to the neutral point of the main transformer through the grounding grid, and finally flow into the ground from the neutral point of the main transformer. Since the performance of the grounding grid directly affects whether the power supply system and the power generation system can operate safely, it is necessary to ensure the safety of the grounding ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08G01R31/02
Inventor 李镇胡静赵旭徐玉明高峰王坦甄龙
Owner SHIJIAZHUANG HONGYAO ENERGY TECH
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