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Interturn fault detection method and device, storage medium and processor

A technology of inter-turn fault and detection method, applied in the field of transformers, can solve the problems of no solution, inter-turn short-circuit fault, and difficulty in detection of transformer inter-turn fault, so as to avoid extremely difficult detection.

Active Publication Date: 2019-03-22
STATE GRID BEIJING ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Power transformers are extremely prone to short-circuit faults, especially inter-turn short-circuit faults, which may lead to accidents and power outages of the transformer, resulting in catastrophic accidents
[0003] Early detection of inter-turn short-circuit faults is crucial to prevent catastrophic accidents caused by transformers, but inter-turn short-circuit faults are extremely difficult to detect in the early stages due to the small number of short-circuited turns
[0004] Aiming at the problem that the inter-turn fault of the transformer is difficult to detect in the prior art, no effective solution has been proposed so far

Method used

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  • Interturn fault detection method and device, storage medium and processor
  • Interturn fault detection method and device, storage medium and processor

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Experimental program
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Effect test

Embodiment 1

[0035] An embodiment of the present invention provides a method for detecting a turn-to-turn fault of a transformer.

[0036] figure 1 It is a method for detecting a turn-to-turn fault of a transformer according to an embodiment of the present invention. Such as figure 1 As shown, the method includes the following steps:

[0037] Step S102, acquiring the first negative sequence current of the primary winding and the second negative sequence current of the secondary winding of the transformer at the fundamental frequency.

[0038] In the technical solution provided by the above step S102 of the present invention, the transformer can be a power transformer, which is used to increase or decrease the voltage of electric energy without changing the frequency, so as to facilitate the distribution, transmission and use of electric energy, and further greatly Reduce the loss of electric energy and improve energy utilization efficiency.

[0039] In this embodiment, the fundamental ...

Embodiment 2

[0072] The technical solution of the present invention will be illustrated below in combination with preferred embodiments.

[0073] Fig. 2(a) is a schematic diagram of a geometric model of a turn-to-turn short circuit of a transformer according to an embodiment of the present invention. As shown in 2(a), the circuit of the transformer in this embodiment consists of an iron core 1 , a low voltage winding 2 and a high voltage winding 3 . in. There is a short-circuited turn 4 on the high-voltage winding 3 , that is, an inter-turn short-circuit fault occurs on the high-voltage winding 3 .

[0074] Fig. 2(b) is a schematic circuit diagram of a turn-to-turn short circuit of a transformer according to an embodiment of the present invention. As shown in Figure 2(b), the transformer consists of phase A, phase B, and phase C, where the winding corresponding to B has a short-circuited turn.

[0075] In this embodiment, the current of the primary winding of the power transformer and t...

Embodiment 3

[0090] The embodiment of the invention also provides a transformer inter-turn fault detection device. It should be noted that the device for detecting an inter-turn fault of a transformer in this embodiment can be used to implement the method for detecting an inter-turn fault of a transformer in an embodiment of the present invention.

[0091] Image 6 is a schematic diagram of a transformer turn-to-turn fault detection device according to an embodiment of the present invention. Such as Image 6 As shown, the device includes: an acquisition unit 10 and a determination unit 20 .

[0092] The acquiring unit 10 is configured to acquire the first negative sequence current of the primary side winding and the second negative sequence current of the secondary side winding of the transformer at the fundamental frequency.

[0093] The determination unit 20 is configured to determine that an inter-turn short-circuit fault occurs in the transformer when the first negative-sequence cur...

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Abstract

The invention discloses an interturn fault detection method and device, a storage medium and a processor. The method includes the following steps that first negative sequence current of a primary winding of a transformer and second negative sequence current of a secondary winding of a transformer at fundamental frequency are obtained; when the first negative sequence current and the second negative sequence current meet a target condition, it is determined that the transformer has an interturn short circuit fault. The detection effect of the interturn short circuit fault of the transformer isachieved.

Description

technical field [0001] The present invention relates to the field of transformers, in particular to a method, device, storage medium and processor for detecting inter-turn faults of transformers. Background technique [0002] At present, transformers are extremely numerous and extremely important electrical equipment in power systems, used to transmit power to energy-consuming areas. Power transformers are prone to short-circuit faults, especially inter-turn short-circuit faults, which may lead to accidents and power outages of the transformer, and then cause catastrophic accidents. [0003] Early detection of inter-turn short-circuit faults is crucial to prevent catastrophic accidents caused by transformers, but inter-turn short-circuit faults are extremely difficult to detect in the early stage due to the small number of short-circuited turns. [0004] Aiming at the problem that the inter-turn fault of the transformer is difficult to detect in the prior art, no effective ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02
CPCG01R31/50G01R31/62
Inventor 齐伟强任志刚周松霖张玉佳聂卫刚桂媛徐兴全马锋
Owner STATE GRID BEIJING ELECTRIC POWER
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