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On-line monitoring and fault diagnosis system for power distribution network PT

A fault diagnosis system and technology of distribution network, applied in the field of power equipment and 3-35kV distribution network, can solve problems such as fault expansion, and achieve the effects of high reliability, high measurement accuracy and low power consumption

Active Publication Date: 2014-07-23
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Claims
  • Application Information

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Problems solved by technology

Since the phenomena of these types of faults are very similar, operators can only analyze based on experience, and it is often difficult to accurately diagnose the type of fault. If the operator makes a wrong judgment and takes the wrong operation, it may cause the fault to expand

Method used

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  • On-line monitoring and fault diagnosis system for power distribution network PT
  • On-line monitoring and fault diagnosis system for power distribution network PT
  • On-line monitoring and fault diagnosis system for power distribution network PT

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Embodiment Construction

[0032] The technical solutions of the present invention will be further described in detail through specific embodiments below in conjunction with the accompanying drawings.

[0033] The application discloses a distribution network PT online monitoring and fault diagnosis system. The system can measure three phase currents, three phase voltages, three line voltages and zero-sequence voltage data of a distribution network PT. The measured data can accurately determine whether the system has a single-phase ground fault, a ferromagnetic resonance fault, or a PT disconnection fault. The system consists of three parts: current measurement terminal, collector and background server. The current measurement terminal is installed on the PT three-phase line of the distribution network, and uses the principle of electromagnetic induction to measure the three-phase current of the PT in the distribution network. The collector is installed on the panel of the PT cabinet, receives the data ...

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Abstract

Provided is an on-line monitoring and fault diagnosis system for a power distribution network PT. The system can be used for measuring three phase currents, three phase voltages, three line voltages and zero sequence voltage data of the power distribution network PT. Whether the system has a single-phase grounding fault, a ferromagnetic resonance fault and a PT line breakage fault can be accurately judged through actually-measured data. The system is composed of a current measurement terminal, a collector and a background server. The current measurement terminal is arranged on a three-phase line of the power distribution network PT, and the three phase currents of the power distribution network PT are measured according to the electromagnetic induction principle. The collector is arranged on a panel of a PT cabinet, receives data of the terminal, meanwhile, measures the phase voltages, the line voltages and a zero sequence voltage of the PT, and uploads the data to the background server. The background server is arranged inside a transformer substation, receives the data of the collector, and conducts on-line monitoring and fault diagnosis on the power distribution network PT. According to the on-line monitoring and fault diagnosis system for the power distribution network PT, technology is mature, and reliability is high.

Description

technical field [0001] The invention belongs to the technical field of electric power monitoring, and in particular relates to electric power equipment, which is suitable for a 3-35kV distribution network. It can monitor PT three-phase voltage and current online, and can accurately judge whether the system has a single-phase ground fault, ferromagnetic resonance fault, or PT disconnection fault through the measured data based on rough set theory. Background technique [0002] my country's 3-35kV distribution network is prone to single-phase ground faults, ferromagnetic resonance faults, and PT disconnection faults. Because the phenomena of these types of faults are very similar, operators can only analyze based on experience, and it is often difficult to accurately diagnose the type of fault. If the operator makes a wrong judgment and takes the wrong operation, the fault may expand. [0003] In order to more accurately analyze the type of system faults, practical technologi...

Claims

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Application Information

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IPC IPC(8): G01R19/25G01R31/08
Inventor 齐郑张慧汐饶志李志李砚蔡志伟
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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