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Transformer on-load tap-changer state monitoring device

A monitoring device and on-load tap-off technology, applied in measurement devices, circuit breaker testing, instruments, etc., can solve the problems of low efficiency, large workload, and low measurement accuracy.

Inactive Publication Date: 2021-08-31
PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantages of offline regular maintenance are heavy workload, low efficiency and low measurement accuracy

Method used

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  • Transformer on-load tap-changer state monitoring device
  • Transformer on-load tap-changer state monitoring device
  • Transformer on-load tap-changer state monitoring device

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with embodiment. Apparently, the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0034] The operating status of the tap changer during operation includes shifting not in progress, shifting in progress, shifting switching, shifting completed, and shifting abnormal, etc. During the operation of the tap changer, a certain vibration signal will be generated, the current on the drive motor will also change, and the angular velocity on the transmission shaft will also change. The transformer on-load tap changer state monitoring device provided by the present invention is proposed based on these characteristics in the operation process of the tap changer.

[0035] The ...

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Abstract

The invention discloses a transformer on-load tap-changer state monitoring device. The device comprises a vibration acquisition unit arranged on a tap-changer top cover, a current acquisition unit arranged on a driving motor and an angular velocity acquisition unit arranged on a transmission shaft, wherein the vibration acquisition unit is used for acquiring a vibration signal of the top cover, the current acquisition unit is used for acquiring a current signal of the driving motor, the angular velocity acquisition unit is used for acquiring an angular velocity signal of the transmission shaft, the vibration acquisition unit, the current acquisition unit and the angular velocity acquisition unit are respectively connected with a signal analysis unit through a signal conditioning module, and the signal analysis unit is used for judging a running state of the tap switch. According to the transformer on-load tap-changer state monitoring device provided by the invention, the running state of the tap-changer is judged by adopting a mode of mutually verifying three parameters, so accuracy of judging the state of the tap-changer is improved, risk pre-control is realized, the influence of power failure caused by overhauling after the tap-changer is abnormal is avoided, and time cost and equipment maintenance cost are reduced.

Description

technical field [0001] The invention relates to the technical field of transformer monitoring, in particular to a state monitoring device for an on-load tap changer of a transformer. Background technique [0002] With the rapid development of my country's power industry, the capacity of power equipment and the scale of power networks are increasing day by day, which poses higher requirements and unprecedented challenges to the quality of power supply. The state monitoring and fault diagnosis of power equipment is mainly to find out the fault law of the early stage and latent faults of the current equipment through various technical means. The diagnosis of such faults is one of the hot spots in the current power system research. This and instantaneous fault judgment after protection action are two aspects of the same problem. Relay protection cannot solve hidden and latent early faults, so it is of great significance to study the state monitoring and fault diagnosis of power ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327G01D21/02
CPCG01R31/327G01D21/02
Inventor 梁璐张琦司雪峰王锦博王迪蒋延磊张世坤王春强张宁曹心怡王莹秋高琳翔
Owner PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
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