用于测量工频和雷电流罗氏线圈的研制

发布时间：2018-10-13 14:42

【摘要】：针对带磁芯的罗氏线圈测试大电流时候出现磁饱和现象导致线性度差以及空心罗氏线圈测量小电流时候增益不大、测试不准等问题,利用柔性罗氏线圈、积分电阻、高输入阻抗有源放大器等部件研制出了一种用于检测雷电流与工频电流的宽带有源柔性线圈。当存在雷电电流或工频大电流作用于测试通道时,将直接由采集示波器采集通道中电流的幅值以及波形;当存在微小工频电流信号作用于测试通道时,线圈与外积分电路配合使用可用于检测微弱的工频电流。做实验之前,先用multisim软件对罗氏线圈等效电路进行仿真,根据仿真结果来制作、测试线圈。线圈研制完成之后,分别使用短路电流波以及不同大小的工频电流来测试线圈测量的误差率,柔性罗氏线圈对工频小电流和雷电流的测量起到一定的工程应用价值。
[Abstract]:In view of the problem that the magnetic saturation phenomenon of the Roche coil with magnetic core leads to the difference of linearity, the gain of the hollow Roche coil is not large when measuring the small current, and the measurement is not correct, the flexible Roche coil is used to integrate the resistance. A wideband active flexible coil used to detect lightning current and power frequency current is developed for high input impedance active amplifier. When there is lightning current or high power frequency current acting on the test channel, the amplitude and waveform of the current in the channel will be collected directly by the acquisition oscilloscope, and when there is a tiny power frequency current signal acting on the test channel, The coil can be used to detect weak power frequency current when combined with external integral circuit. Before the experiment, the equivalent circuit of Roche coil is simulated by multisim software, and the coil is made and tested according to the simulation results. After the development of the coil, short-circuit current wave and power frequency current of different sizes are used to measure the error rate of the coil, and the flexible Roche coil plays a certain engineering application value in the measurement of the low power frequency current and the lightning current.
【作者单位】：南京信息工程大学中国气象局气溶胶-云-降水重点开放实验室;南京信息工程大学电子与信息工程学院;
【基金】：国家自然科学基金项目(编号:41175003) 江苏高校优势学科建设工程资助项目(编号:PAPD)
【分类号】：TM933.1

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