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Device and method for coherent separation of noise of equipment of direct-current convertor station

A technology of DC converter station and separation device, which is applied to measurement devices, ultrasonic/sonic/infrasonic waves, instruments, etc., can solve problems such as difficulty in accurate measurement and noise interference from other equipment operation, so as to avoid the danger of high voltage and ensure safety. Effect

Inactive Publication Date: 2010-08-04
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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Problems solved by technology

Since each device has high voltage, it is not allowed to be close to the measurement, and it is very susceptible to interference from the operating noise of other devices when it is far away from the device
[0004] Therefore, it is very difficult to accurately measure the noise of a certain equipment in the converter station

Method used

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Embodiment Construction

[0017] see figure 1 , 2 , a coherent separation device for equipment noise in a DC converter station, including a device under test 1, a directional sound transmission device 2 and a laser vibrometer 3 are respectively arranged outside the device under test 1, and the directional sound transmission device 2 includes a cup Shaped sound cover 4, one end of the cup-shaped sound cover 4 is a large-diameter open end, and the other end is a small-diameter closed end; the outer shell of the cup-shaped sound cover 4 is a metal body with better sound insulation performance, which is close to the inner wall of the cup-shaped sound cover 4 A layer of sound-absorbing material 5 is laid on the closed end of its small diameter; an amplifier 7 is installed along the inner axis of the cup-shaped sound cover 4, and one end of the amplifier 7 is fixedly connected to a microphone 8, and the receiving surface of the microphone 8 faces the cup-shaped sound cover 4 The other end of the amplifier 7...

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Abstract

The invention discloses a device and a method for the coherent separation of the noise of the equipment of a direct-current convertor station. A sound transmission device and a laser vibration measurer are respectively arranged outside equipment to be measured, a noise signal and a vibration signal of the equipment to be measured are respectively measured by the sound transmission device and the laser vibration measurer, and coherence analysis is carried out on the noise signal and the vibration signal by a computer, i.e. the noise at the position of a frequency with large coherence value is generated by the equipment when working, and the noise at the position of a frequency with small coherence value (such as smaller than 0.8 under a given confidence) is not caused by the vibration of the equipment to be measured. The invention does not need to contact with the equipment to be measured, can remotely measure the vibration and the noise of the equipment to be measured, avoids high-voltage danger and guarantees the safety of instruments; and by utilizing the coherence between the vibration and the noise, the noise spectrum and the noise magnitude of certain equipment can be separated from a complicated place with the together radiating noise of various kinds of equipment.

Description

technical field [0001] The present invention relates to the technical field of noise coherent separation, in particular to a device and method for noise coherent separation of DC converter station equipment. Background technique [0002] The HVDC converter station (hereinafter referred to as the converter station) is a place with high noise pollution. Controlling the noise of each equipment in the converter station is the main measure to prevent and control noise pollution. When controlling equipment noise, it is necessary to know the size and characteristics of the noise radiation of each equipment, which requires accurate measurement of the noise radiated individually by each equipment. [0003] There are many different types of equipment in the converter station. Even if it is the same type of equipment, there are many equipments running at the same time, which makes the noise in the HVDC converter station overlap and interfere with each other. The noise measured at any ...

Claims

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Application Information

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IPC IPC(8): G01H9/00
Inventor 黄莹李志远黎小林魏浩征黄国兴朱功辉
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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