High-capacity square wave impact current generator

Abstract

The invention relates to a large capacity square-wave impacting current generator, which is particularly applied to a test on a super high voltage lightning arrester. The generator comprises a charging return circuit and a discharging return circuit, wherein the charging return circuit is formed through electrically connecting a voltage regulating device, a high voltage test transformer, a high-voltage silicon stack, a charging protecting electric resistance, capacitance and a wave regulating electric inductance in turn, the discharging return circuit is formed through electrically connectingthe capacitance, the wave regulating electric inductance, a discharging gap G, a tube type diffluence device Rs and a test product Rx in turn, and the capacitance and the wave regulating electric inductance are formed into an L-C energy storing unit. The generator is characterized in that the L-C energy storing unit is a double-chain parallel type or multiple-chain parallel type, which has the advantages of large current amplitude which is generated, easy quality control for unit components, convenient wave regulation and amplitude modulation, long service life of a whole device and the like.

Description

Technical field [0001] The invention patent relates to a large-capacity square wave impulse current generator, in particular to a large-capacity square wave impulse current generator for UHV lightning arrester testing. Background technique [0002] According to the technical specifications for ceramic-coated metal oxide arresters for 1000kV systems, a long-duration impulse current withstand test is a must. The long-duration impulse current is divided into 2ms square wave impulse current and line discharge. The 2ms square wave impulse withstand current can be as high as 8000A, the line discharge level is 5, and the apparent peak duration of the discharge current is 3200μs. [0003] The long-duration impulse current generator is usually realized by an LC intensive parameter single-chain network. This method has a large inductance value of a single inductor. Due to the large current passing through the inductor coil, the generated electromotive force is also large, and it is extremely...

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Problems solved by technology

[0003] The long-duration impulse current generator is usually realized by LC centralized parameter single-chain network. In this method, the inductance value of a single inductor is large. Due to the large current passing through the inductor coil, the electromotive force generated is also large, and it is very easy to break the line and damage it. Phenomenon

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