Substation Magnetic Field Measurement System For Transient

There is complicated transient electromagnetic interference in substation, whose pulse can rise along in ns, its frequency band is in the rang of hundreds of MHz.it is important to understand the distribution of substation transient disturbance and the amplitude of the numerical characteristics. The paper based on Faraday law on electromagnetic induction, with small and optical fiber transmission technology, developed a set of broad-spectral-bandwidth, amplitude, magnetic pulse measurement system responsing in ns;And putted forward the application of CT measurement with indirect closed coil induced current measurement of the magnetic field strength design, researched and developed a new magnetic detector. And introduced the design principle of the measurement system and components, focused on the mechanism of magnetic field of the transformation, amplitude frequency characteristics, dynamic response sensitivity, as well as geometric structure to probe the influence, and verified by experiments. By electromagnetic pulse generator, the measurement system of testing sensitivity for 160V/T, band for 15k-200MHz, which can meet the substation transient field measurement requirements.