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Power transmission and transformation system fault searching locating instrument and searching method

A system fault, power transmission and distribution technology, applied in fault locations, information technology support systems, etc., can solve the problems of unsuitable requirements for intelligent power grids, time-consuming and laborious, etc., and achieves easy field operation, mature technology, strong anti-interference. Effect

Inactive Publication Date: 2014-01-15
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional grounding or short-circuit faults are determined by manual line inspection and visual inspection, which is time-consuming and labor-intensive, and is extremely incompatible with the requirements of smart grids

Method used

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  • Power transmission and transformation system fault searching locating instrument and searching method
  • Power transmission and transformation system fault searching locating instrument and searching method
  • Power transmission and transformation system fault searching locating instrument and searching method

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Embodiment Construction

[0028] combined with figure 1 , attached figure 2 , attached image 3 , to further describe the present invention:

[0029] The fault finding and locating instrument of the power transmission and distribution system mentioned in the present invention includes a host, an accessory of the host and a monitor. The host and the monitor are connected through the accessory of the host. Button 3, voltage indication meter 4, current indication meter 5, voltage adjustment button 6, voltage adjustment button 6 is set in the center of the host, power input terminal 1, signal output terminal 2, start-stop button 3, voltage indication meter 4 and current indication Table 5 is set on the periphery of the voltage adjustment button 6; the host accessories include a power cord 7, a signal injection terminal line 8, a signal injection ground terminal line 9, a short-circuit ground test terminal line 10, a ground electrode 11, an insulating rod 12 and a ground clip 13, and all Said host a...

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Abstract

The invention relates to an electric power circuit fault detect device and detecting method, in particular to a power transmission and transformation system fault searching locating instrument and a searching method. The locating instrument comprises a host, a host accessory and a monitor. The host and the monitor are connected through the host accessory. In a test, a signal source outputs high-voltage signals to an electric power circuit grounding phase to break down a grounding point, and the grounding point is maintained in a grounding state through constant currents. The currents flow along the grounding phase of a grounding circuit and enter the ground through the grounding point, and a closed loop is formed with the ground. The signal monitor tracks the signal currents of the grounding circuit. Several important points are measured along the circuit with a bipartition method, and by detecting changing of the injected signals, the accurate positions of a grounding branch and the grounding points can be determined smoothly. The power transmission and transformation system fault searching locating instrument and the searching method have the advantages the positions of fault points can be accurately determined, rod ascending checking rod by rod is of no need, working efficiency is improved, and labor intensity is lowered.

Description

technical field [0001] The invention relates to a power line fault detection device and a detection method, in particular to a power transmission and distribution system fault finding locator and a finding method. Background technique [0002] There are basically two types of faults in the transmission and distribution network: one is grounding and the other is short circuit. There are many branches of power transmission and distribution lines in our country, which is the main reason why it is difficult to locate the fault point. There are many reasons for ground faults, among which the frequency of ground faults caused by weak insulation points is the highest. The resistance of weak insulation points to ground varies, and some can reach 20kΩ or greater; some weak points of insulation have linear impedance to ground (grounding at low voltage fault), others are non-linear (earth fault at high voltage). The appearance of insulation weakness is also varied, such as insula...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCY04S10/52
Inventor 孙双春陈文民高明华马广俊马宏泽肖军华盖学海杨义志
Owner CHINA PETROLEUM & CHEM CORP
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