Transformer state online monitoring system and method based on OFDM carrier signals

A carrier signal, transformer technology, applied in the field of transformers, can solve the problem of inability to realize online detection and so on

Active Publication Date: 2020-01-14
SPL ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method is generally considered to be an effective transformer fault detection method, it can only be used for maintenance after the transformer is shut down, and cannot realize online detection.

Method used

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  • Transformer state online monitoring system and method based on OFDM carrier signals
  • Transformer state online monitoring system and method based on OFDM carrier signals
  • Transformer state online monitoring system and method based on OFDM carrier signals

Examples

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Embodiment Construction

[0053] The present invention is an on-line monitoring system for transformer operating status based on OFDM carrier signals, wherein: a concentrator and its carrier communication module CCO are installed on the secondary side of the transformer, and a three-phase transformer is installed on the primary side of the transformer after passing through a voltage transformer PT and a current transformer CT. Carrier communication equipment, the three-phase carrier communication equipment includes a primary side three-phase carrier communication module STA-P3H and a power supply module;

[0054] The corresponding pin of the carrier communication signal output end of the PLC chip passes through the power amplifier, the independent output controllable channel corresponding to the A / B / C phase and the coupling circuit, and is connected to the corresponding phase line of the power line; the corresponding phase line of the power line also passes through the corresponding phase line at the sam...

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Abstract

The invention discloses a transformer state online monitoring system and a transformer state online monitoring method based on OFDM carrier signals. The transformer state online monitoring system comprises a concentrator and a carrier communication module CCO thereof which are installed on a secondary side of a distribution transformer, and three-phase carrier communication equipment installed ona primary side of the distribution transformer after passing by means of a voltage transformer and a current transformer, wherein the three-phase carrier communication equipment comprises a primary side three-phase carrier communication module STA-P3H and a power supply module. The transformer state online monitoring system and the transformer state online monitoring method adopt the OFDM carriersignals to realize measurement, recording, tracking and comparison of on-line frequency characteristics of the primary side and the secondary side of the transformer, thus defects of the transformer can be found in time under the condition that the transformer does not need to be shut down, and fault early warning is provided.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a system and method for on-line monitoring of transformer operation status based on OFDM carrier signals. Background technique [0002] The normal operation of transformers is the basic guarantee for power users to use electricity safely and reliably. Distribution transformers will suffer from faults such as coil deformation and insulation damage due to surges, lightning strikes, and inherent defects. The continuous temperature rise of the fault point will cause the transformer to catch fire and explode, resulting in vicious accidents. The power company usually conducts power outage inspections on the operation of transformers once or twice a year, but this method of power outage inspection not only affects normal power consumption, but also makes it difficult to find hidden problems in time. For this reason, distribution transformers need online monitoring equipment to tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 庞浩
Owner SPL ELECTRONICS TECH CO LTD
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