用于电晕放电远距离探测的螺旋天线的研究

为了降低输入噪声水平，实现在自然环境下对高压、特高压输电线上电晕放电的远距离探测。在实验室环境下搭建电晕放电实验平台，观察得到电晕放电信号具有频率分布广、信号幅度小、随机性强等特点。在自然环境下某放电强烈的超高压输电线附近的噪声和电晕信号进行了测试，确定信噪比最大的测试频段为200MHz—300MHz。以此为基础，仿真设计了中心频率为250MHz的高增益螺旋天线。根据仿真参数实际制作的螺旋天线，与仿真相符，并成功探测到实验场环境下约140米左右的电晕放电信号。此天线的设计与研制为进一步研究高压、特高压输电线远距离电晕放电探测技术奠定了基础。文中涉及到的电晕放电信号特征及探测方法对相关领域研究人员，具有重要的参考价值。

Research on Helical Antenna for Long-Range Detection for Corona Discharge

In order to reduce the input noise level, and detect the corona discharge from high and ultra-high voltage transmission lines in remote distance in the natural environment. A corona discharge experiments platform in laboratory environment was built to observe the characteristics of corona discharge signal, which include wide distribution of frequency, small signal amplitude and strong randomness. The noise and corona signal level was tested near the ultra-high voltage line with strong discharge in the natural environment. The maximum signal-to-noise ratio band was found, which is 200MHz-300MHz. On this basis, a high gain helical antenna with a center frequency of 250MHz was simulated and designed. According to the simulation parameters an actual production of the helical antenna was made, which consistent with the simulation, and successfully detected the corona discharge signal about 140 meters away in the experimental environment. The design and development of this antenna laid a foundation for further study of the long-range detection of the corona discharge from high and ultra-high voltage transmission lines. The characteristics of corona discharge signal and the detection method has important reference value to researchers in related fields.