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A grounding fault discrimination method of a grounding detection device in a power distribution system

A ground detection and power distribution system technology, applied in the direction of fault location, information technology support system, etc., can solve the problems of production continuity impact, time-consuming and laborious, etc., and achieve the effect of avoiding wiring procedures, convenient use, and prolonging the number of uses

Inactive Publication Date: 2012-02-15
BAOWU CHARCOAL MATERIAL TECH CO LTD
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Problems solved by technology

This traditional method of finding faulty feeders is at the cost of production line downtime, coupled with the use of troubleshooting to find faulty feeders, it is not only time-consuming and laborious, but sometimes has a significant impact on the continuity of production

Method used

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  • A grounding fault discrimination method of a grounding detection device in a power distribution system
  • A grounding fault discrimination method of a grounding detection device in a power distribution system
  • A grounding fault discrimination method of a grounding detection device in a power distribution system

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Embodiment Construction

[0043] The specific implementation of a power distribution system ground detection device and fault discrimination method according to the present invention will be described in detail below in conjunction with the accompanying drawings of the embodiments.

[0044] see figure 1 , figure 1 It is a panel diagram of a power distribution system grounding detection device.

[0045] The present invention is equipped with following parts on panel 14:

[0046] n zero-sequence current collectors for n ranges (this embodiment uses n=3) (this embodiment is respectively zero-sequence current collector 1 with a range of 1mA to 20mA; zero-sequence current collector with a range of 20mA to 200mA 2. A zero-sequence current collector with a range of 200mA to 1000mA 3), used for zero-sequence current collection in three-phase feeders of different power distribution systems.

[0047] The battery box 4 is used to place several batteries as the battery power supply of the device.

[0048] Two po...

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Abstract

The invention provides a grounding detection device for a power distribution system and a fault detection method thereof, and aims to solve the problem that the detection operation is not easy and convenient, and the problem that the conventional detection device is not suitable to be used for various power systems existing in the conventional detection device. The device consists of a signal acquisition treatment display device used for acquiring and treating zero sequence current of a feeder line to be detected and a power circuit, wherein the signal acquisition treatment display device comprises n groups of acquisition treatment display devices with the same structure for detecting the signals of the detected zero sequence current in n different measuring ranges respectively; and the power circuit may adopt a mains supply or a battery supply. The method comprises the following steps of: estimating the zero sequence current of the system; measuring the zero sequence current of the feeder line by using the grounding detection device for the power distribution system; and determining and troubleshooting the fault line. By using the device, an operator can quickly, safely and accurately detect the feeder line having the grounding fault in a short time, and the device is suitable to be used for various power systems.

Description

technical field [0001] The invention relates to a grounding detection device of a distribution system and a method for discriminating a grounding fault of a distribution system by using the detection device, which belongs to the field of electric power detection. Background technique [0002] The IT grounding system refers to the system in which the neutral point of the transformer is not directly grounded, commonly known as the small current grounding system. This form of grounding system is generally used in high-voltage power supply systems below 110KV, and is rarely used in 380V power supply systems. However, some industrial and mining enterprises now use the IT grounding system in the 380V power distribution system that only supplies three-phase AC power loads, that is, the neutral point of the transformer is suspended from the ground, the zero line of the transformer is not drawn out, and the unit required for the power load Phase control power is obtained through 380...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCY04S10/522Y04S10/52
Inventor 艾德跃
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD
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