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Measurement method and system of interphase leakage magnetic fields of transformer windings

A transformer winding and measurement system technology, applied in the direction of the magnitude/direction of the magnetic field, electric magnetometer, etc., can solve problems affecting the evaluation of transformers, large errors in transformer leakage magnetic field measurement, etc.

Active Publication Date: 2017-09-26
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0005] This application provides a method and system for measuring the leakage magnetic field between phases of transformer windings, in order to solve the problem that the existing detection method has a large error in the measurement of the leakage magnetic field of the transformer, which affects the evaluation of the transformer

Method used

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  • Measurement method and system of interphase leakage magnetic fields of transformer windings
  • Measurement method and system of interphase leakage magnetic fields of transformer windings
  • Measurement method and system of interphase leakage magnetic fields of transformer windings

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Embodiment Construction

[0025] see figure 1 , is a structural schematic diagram of a measurement system for the interphase leakage magnetic field of the transformer winding 2 provided in the embodiment of the present application. like figure 1 As shown, the measurement system of the transformer winding 2-phase leakage field includes:

[0026] Power supply 1. A transformer winding 2 electrically connected to the power supply 1 . A short-circuit device 3 connected to the line between the power supply 1 and the transformer winding 2 .

[0027] In the embodiment of the present application, the focus is on the distribution of the leakage magnetic field of the transformer winding 2 in the short-circuit state. Therefore, by designing the short-circuit device 3, the transformer winding 2 can be short-circuited, so that the distribution of the leakage magnetic field of the transformer winding 2 in the short-circuit state can be accurately studied. Happening. In addition, the transformer in the embodiment...

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Abstract

The invention discloses a measurement method and system of interphase leakage magnetic fields of transformer windings. The measurement system of the interphase leakage magnetic fields of the transformer windings comprises a power supply, transformer windings electrically connected with the power supply, a short circuiting device communicated with lines between the power supply and the transformer windings, magnetic induction sensors arranged in middle positions of adjacent windings of all transformer windings and used for inducing the leakage magnetic fields between the adjacent windings, an electromotive force measurement device electrically connected with the magnetic induction sensors, as well as a magnetic density calculation device electrically connected with the electromotive force measurement device. By means of the technical scheme, the accuracy of the leakage magnetic fields can be improved.

Description

technical field [0001] The present application relates to the field of electric power technology, in particular to a method and system for measuring the leakage magnetic field between phases of transformer windings. Background technique [0002] As a static electrical device, the power transformer can transform the AC voltage into another voltage with the same frequency or several different values ​​through the law of electromagnetic induction. The power transformer used in the power system has a large capacity, and the voltage transformation capability of the internal winding is generally strong, so it is easy to cause overheating of the clips and magnetic shielding materials caused by the leakage magnetic field. [0003] In order to reduce the overheating of the transformer caused by the leakage field, Hall sensors are usually used in the prior art to obtain the signal of the leakage field, and then the signal is processed by a computer to analyze the magnetic flux density...

Claims

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Application Information

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IPC IPC(8): G01R33/028
Inventor 邹德旭彭庆军孟庆民颜冰钱国超刘光祺
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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