Distribution transformer running noise active noise reduction system

Abstract

The invention belongs to the technical field of active noise reduction, and discloses a distribution transformer running noise active noise reduction system. The key problem above control over the running noise of a distribution transformer is solved. The system is mainly technically characterized in that running state signals in a distributor transformer running in a power distribution cabinet are collected through a noise microphone, a vibration sensor, a voltage and current sensor and the like, analog signals are converted into digital signals, the running noise spectrum of the distribution transformer is recognized on line through signal amplification and sampling, control signals are formed through an active noise control algorithm, the digital signals are converted into analog signals, a control sound source is driven to produce sounds or a vibrator is motivated to vibrate through a power amplifying circuit, and the purpose of eliminating the control sound source and distribution transformer running noise at the same time is achieved by overlaying the control sound source and distribution transformer running noise. The system has the remarkable advantages of eliminating distribution transformer running noise through the active noise reduction technology, and being capable of being widely applied in building power distribution rooms and the like.

Description

technical field [0001] The present invention relates to active noise control technology. It specifically relates to an active noise reduction system for distribution transformer operating noise. Background technique [0002] Noise pollution has become the third largest source of pollution after air pollution and water pollution. When people are exposed to the noise environment for a long time, it may lead to the damage of human hearing, and cause various neurological diseases, such as dizziness, headache, insomnia, memory loss, fear, irritability, low self-esteem and even insanity, etc., more serious, May induce high blood pressure and heart disease, etc. [0003] A large number of power distribution rooms are located in residential buildings, and the operation of distribution transformers brings low-frequency roar, which greatly affects the daily life and sleep of residents, and causes group petitions and complaints. It is very important to explore methods and measures t...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to address the low-frequency noise in the operation of distribution transformers, to overcome the key technical problems of complex design, high cost, difficult construction, high cost and high safety risk of transmission passive noise reduction methods, and through active noise reduction technology , to achieve active noise reduction control of distribution transformer low-frequency operating noise

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