高压输电线路电晕放电可听噪声信号检测系统设计与实现

针对电晕放电初期会产生可听噪声，而这种可听噪声受环境干扰不易检测，设计了高压输电线路电晕放电可听噪声信号检测系统。系统硬件以STM32芯片为基础，通过射频电路和GPRS模块无线传输数据，软件中设计了结合自适应噪声对消原理和神经网络的去噪算法，实现了对8kHz-20kHz频率的电晕放电可听噪声信号的检测。通过对10kV-100kV电压的电晕放电可听噪声进行多次实验验证，该系统运行良好，能够准确检测电晕放电。

Design and Implementation of Corona Audible Noise Signal Detecting System of High Voltage Transmission Line

For the initial corona discharge will produce audible noise and these noise along with the environment noise are hardly to detect, a audible corona noise signal detecting system of the high voltage transmission line is designed. The hardware of this system is based on chips of STM32,and it transmits data through wireless network by RF circuit and GPRS.In the software of this system,a denoising algorithm combined adaptive noise cancellation principle with neural network is designed.So this system can be used to detect the audible noise signal of corona discharge among the frequency of 8kHz-20kHz.We have done several experiments which include detecting the audible noise of corona discharge under voltage of 10kV-100kV,and the results verify that this system runs well and can be used to detect corona discharge accurately.