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Device and method for testing noise of power capacitor unit

A technology for power capacitors and capacitors, which is used in measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problems of difficult test and high test cost, and achieve the effects of easy maintenance, cost saving and simple structure

Inactive Publication Date: 2018-03-16
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current measurement of capacitor noise is carried out in semi-anechoic chambers, and there are very few laboratories that are able to test experimental conditions. This is very difficult for enterprise capacitor noise research, and the test cost is particularly high.

Method used

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  • Device and method for testing noise of power capacitor unit
  • Device and method for testing noise of power capacitor unit
  • Device and method for testing noise of power capacitor unit

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Embodiment Construction

[0029] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0030] see figure 1 , a device for testing the noise of a power capacitor unit, including a number of microphones arranged on two concentric semicircles, the capacitor under test is arranged at the center of the two concentric semicircles, and the number of microphones on the two concentric semicircles is equal, and each semicircle The number of microphones to be set is 1 to 20, the microphones on the inner semicircle are set on the quarter arc of the inner semicircle, the microphones on the outer semicircle are set on the quarter arc of the outer semicircle, and the microphones on the inner semicircle The acute angle between the line connecting the microphone and the center of the circle and the horizontal plane is equal to the acute angle between the line connecting the corresponding microphone and the center of the circle and the horizontal plane on the outer semic...

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Abstract

The invention discloses a device and a method for testing the noise of a power capacitor unit. The method comprises the steps of applying a dual-spherical method to rotationally scan for measuring, utilizing a single frequency or a multifrequency for providing a loading harmonic wave to a capacitor to be tested, then utilizing a structure device for measuring the noise of the power capacitor, rotating a microphone used for measuring through the device, transmitting a noise signal acquired by the microphone to a noise tester for carrying out spectral analysis, and finally obtaining a noise parameter through calculated analysis. By using the device provided by the invention, not only can the laboratory cost be greatly saved, but also the required test conditions are relatively simple and easy to maintain, and most importantly, the noise parameter basically approximate to the noise under a real operation condition of the capacitor can be measured, so that a scientific basis is provided for capacitor noise level estimation and treatment.

Description

technical field [0001] The invention relates to the field of power capacitor noise measurement, in particular to a device and method for testing the noise of a power capacitor unit. Background technique [0002] With more and more EHV and UHV DC transmission projects, the noise of power capacitors in HVDC converter stations has attracted more and more attention, especially the noise of AC filter capacitor banks is more serious, which has become a difficulty in environmental governance . Since the occurrence of capacitor noise is related to many factors, especially the harmonics injected into the capacitor are closely related. At present, there have been many studies on harmonic injection, including single-frequency power injection and multi-frequency simultaneous injection. These methods provide a strong basis for capacitor noise testing. However, most of the current measurement of capacitor noise is carried out in a semi-anechoic chamber, and there are very few laboratori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 林丽妲尤鸿芃姚成信建伟
Owner CHINA XD ELECTRIC CO LTD
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