High-stability lightning impact simulator

Abstract

The invention discloses a high-stability lightning impact simulator. The high-stability lightning impact simulator comprises a charging unit, an energy storage unit, a gap switch unit, at least one first wave modulating resistor, a second wave modulating resistor, an inductor, a non-gap self-adaptive Crowbar switch unit and a to-be-measured loading stage, wherein the charging unit is connected tothe energy storage unit, and the non-gap self-adaptive Crowbar switch unit and the second wave modulating resistor which are in series connection are in parallel connection with the energy storage unit and located between the inductor and the gap switch unit and the first wave modulating resistor which are in series connection; the gap switch unit comprises a high-voltage capacitor side conductiveplate, a high-voltage inductor side conductive plate and a low-voltage conductive plate which are arranged at intervals. The high-stability lightning impact simulator can utilizes a smaller capacitorto achieve the output of the long wave-tail waveform and can be applied to I-type lightning waveforms, the long wave tail impacts current wave to form peak value shock, and the waveform is smoother.

Description

technical field [0001] The invention relates to the technical field of surge protector testing, in particular to a high-stability lightning impulse simulator. Background technique [0002] Lightning is a natural discharge phenomenon in nature. After lightning occurs, through the action of electrostatic induction and electromagnetic induction, lightning overvoltage will be formed in the communication line. The high-stability lightning impulse simulator is mainly used in simulating lightning current generators to generate pulsed current waveforms with large currents and long durations. It is mainly used to simulate Class I lightning (direct lightning) current waveforms of 10 / 350μs, and the direct lightning effect of aircraft. Generator for test waveform A component, D component, and power supply 10 / 1000μs long wave tail waveform. [0003] At present, there are two main types of high-stability lightning impulse simulators on the market. One is the CRL discharge circuit based ...

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Problems solved by technology

[0006] (1) The control of the generator is more complicated, and it is necessary to control the triggering systems of two sets of generators (high-stability lightning impulse simulator and impulse voltage generator) at the same time, so that the impulse voltage generator can delay the impulse current for a certain period of time. The control must be accurate, otherwise it is prone to discharge failure and the control is difficult;

[0007] (2) For multiple ball distance control, the whole system needs to control the three-ball motion of G2 and the coupling ball gap of G3, as well as the trigger ball gap of the impulse voltage generator body, in addition to this set of triggers, which is difficult to coordinate;

[0008] (3) It is difficult to debug the waveform. The length of the wave tail is controlled by the size of the crowbar energy storage inductor L1, but the load impedance of different tested products is different, resulting in large fluctuations in the duration of the wave tail

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