Fault finding locator and method for power transmission and distribution system

A system fault and locator technology, applied in fault locations, information technology support systems, etc., can solve problems such as time-consuming and labor-intensive, incompatibility with the requirements of intelligent power grids, and achieve the effects of mature technology, easy field operation, and strong anti-interference.

Inactive Publication Date: 2017-07-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • 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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  • Fault finding locator and method for power transmission and distribution system
  • Fault finding locator and method for power transmission and distribution system
  • Fault finding locator and method for power transmission and distribution system

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Embodiment Construction

[0028] Attached figure 1 , Attached figure 2 , Attached image 3 , To further describe the present invention:

[0029] The fault finding locator of the power transmission and distribution system mentioned in the present invention includes a host, a host accessory and a monitor. The host and the monitor are connected through the host accessory. The host is provided with a power input terminal 1, a signal output terminal 2, a start-stop Button 3, voltage indicator table 4, current indicator table 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 indicator table 4 and current indicator Table 5 is set on the periphery of the voltage regulation button 6; the accessories of the host include the power cord 7, the signal injection terminal line 8, the signal injection ground terminal line 9, the short-circuit ground test terminal line 10, the ground electrode 11, the...

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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 fault finding locator and a finding method for a power transmission and distribution system. 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 transmission and distribution lines in my country, which is the main reason why it is difficult to locate the fault point. There are many reasons for ground faults. Among them, the frequency of ground faults caused by weak insulation is the highest. The impedance of the weak insulation to the ground varies, and some can reach 20kΩ or more; the impedance of some weak insulation to the ground is linear (grounding at low voltage). Faults), others are non-linear (ground faults at high voltages). The appearance of insulation weakness is also diverse, such as insulator flashover ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCY04S10/52
Inventor 杜正旺马广俊贾东高明华宋春霞孙黎新王涛马宏泽肖军华刘云赵雅洁刘清
Owner CHINA PETROLEUM & CHEM CORP
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