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Looped network fault searching method, device and system

A ring network fault and fault finding technology, which is applied in the direction of measuring devices, instruments, and measuring electronics, can solve the problems of power system safety hazards, independent power system ring network hazards, and the failure point of the ring network cannot be determined, so as to prevent safety Hidden dangers, the effect of improving efficiency and reliability

Active Publication Date: 2021-06-04
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the continuous reliability of power supply, the station AC system does not have fault monitoring and protection such as leakage protection and insulation monitoring. The ring network is more harmful, and it is necessary to find out the fault of the ring network in time
[0003] At present, the existing ring network fault finding method usually monitors the unbalanced current in the line, or injects a voltage signal into the line, and finds the fault point of the ring network by tracking the signal, but the injected signal will cause certain hidden dangers in the power system , and there may be no unbalanced current in the line when a ring network fault occurs, that is, the fault point of the ring network cannot be determined, which affects the efficiency and reliability of ring network fault finding

Method used

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  • Looped network fault searching method, device and system
  • Looped network fault searching method, device and system
  • Looped network fault searching method, device and system

Examples

Experimental program
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Effect test

Embodiment 1

[0041] figure 1 It is a flow chart of a ring network fault finding method provided by Embodiment 1 of the present invention. This embodiment is applicable to ring network fault finding for substations, etc. The method can be executed by a ring network fault finding device, which can Realized by means of software and / or hardware, the device can be integrated in an electronic device such as a computer with a ring network fault finding function, and the method specifically includes the following steps:

[0042] Step 110, acquiring the operating parameters of the first transformer and the operating parameters of the second transformer in the substation.

[0043] Among them, the working parameters include parameters such as frequency, voltage and current. The substation is generally equipped with two or more substation transformers. After the two transformers are stepped down, they can form two 400V AC power supply buses that operate independently. figure 2 It is a schematic diag...

Embodiment 2

[0050] Figure 4 It is a flow chart of a ring network fault finding method provided by Embodiment 2 of the present invention. This embodiment is applicable to ring network fault finding for substations, etc. The method can be performed by a ring network fault finding device, which can Realized by means of software and / or hardware, the device can be integrated in an electronic device such as a computer with a ring network fault finding function, and the method specifically includes the following steps:

[0051] Step 210, acquiring the operating parameters of the first transformer and the operating parameters of the second transformer in the substation.

[0052] Among them, the working parameters include parameters such as frequency, voltage and current. The working parameters of the transformer can be stored in the control system of the substation, and the ring network fault finding device can obtain the working parameters of each transformer in the substation through the port...

Embodiment 3

[0068] Figure 7 It is a structural block diagram of a ring network fault finding device provided in Embodiment 3 of the present invention. The ring network fault finding device includes a parameter acquisition module 310, a signal generation module 320 and a fault determination module 330; wherein, the parameter acquisition module 310 is used to obtain The operating parameters of the first transformer and the operating parameters of the second transformer in the substation; the signal generating module 320 is used to generate a characteristic signal according to the operating parameter of the first transformer and the operating parameter of the second transformer, and pass the characteristic signal through the first inductor Applied to the grounding position of the first transformer; the fault determination module 330 is used to detect whether there is a characteristic signal at the grounding position of the second transformer through the second sensor, and if a characteristic...

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Abstract

The embodiment of the invention discloses a looped network fault searching method, device and system. The looped network fault searching method comprises the following steps: acquiring working parameters of a first transformer and working parameters of a second transformer of a substation; generating a characteristic signal according to the working parameters of the first transformer and the working parameters of the second transformer, and applying the characteristic signal to the grounding position of the first transformer through a first inductor; and detecting whether the grounding position of the second transformer has a characteristic signal or not through a second sensor, if the characteristic signal is detected, determining that the looped network exists between the first transformer and the second transformer, searching and tracking the characteristic signal in each line in the looped network, and determining a looped network fault point. According to the looped network fault searching method, device and system provided by the embodiment of the invention, the efficiency and reliability of looped network fault searching can be improved.

Description

technical field [0001] The invention relates to a ring network fault finding technology, in particular to a ring network fault finding method, device and system. Background technique [0002] In the power system, in order to improve the power supply reliability of the AC power supply for the station, the substation is generally equipped with two or more transformers for the station. In order to ensure the continuous reliability of power supply, the station AC system does not have fault monitoring and protection such as leakage protection and insulation monitoring. The ring network is more harmful, and it is necessary to find out the fault of the ring network in time. [0003] At present, the existing ring network fault finding method usually monitors the unbalanced current in the line, or injects a voltage signal into the line, and finds the fault point of the ring network by tracking the signal, but the injected signal will cause certain hidden dangers in the power system ...

Claims

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Application Information

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IPC IPC(8): G01R31/56
CPCG01R31/56Y04S10/52
Inventor 杨文芳肖梓康罗韩华林立蔡松昆林慧敏黄凯龙廖惠琴李彦孙奇
Owner GUANGDONG POWER GRID CO LTD