河北省及邻区数字电扰动干扰分析

通过对河北省及邻区数字电扰动观测资料进行分析和环境调查,发现主要干扰因素为供电或漏电干扰。如:昌黎地震台地电阻率整点测量受到供电干扰,三河地震台受到恒远自动化仪表厂工作时段供电干扰,高碑店地震台受到商场大型设备供电干扰,广平地震台受到UPS交流电源漏电干扰,昌平地震台受到地铁运行漏电干扰等。电扰动干扰形态相似,均为超过本底值几倍、数十倍乃至上百倍的高值脉冲变化。

Digital electrical disturbance interference analysis of Hebei Province and its adjacent area

Through investigation on the observation environment of electromagnetic disturbance at stations in Hebei Province and its adjacent area, it is found out that the main interference factors are power supply and leakage disturbance. For example, power supply interference exists in hourly value of earth resistivity measures at Changli Seismic Station. Power supply interference of the working period of Hengyuan automation meter factory exists in the observations at Sanhe Seismic Station. There is leakage interference of the great power supply equipment in the megamall at Gaobeidian Seismic Station. There is leakage interference of UPS AC power supply at Guangping Seismic Station. And subway circulation interference exists at Changping Seismic Station. The morphological characteristics of interference are similar, as pulses with high value that higher than the background value by several times, dozens of times, even hundreds of times.