300kv Lightning Impulse Withstand Voltage Test Generator
I. Brief introduction
Multistage impulse generator is a test equipment to simulate the high voltage of pulse. In real life, pulse high voltage is often encountered. For example, in nature, lightning strikes, the lightning will appear very high pulse current and voltage, the surrounding will also sense a very high pulse voltage, and in the power system, the switching equipment in the joint operation will also lead to transient pulse voltage. These transient pulse voltage amplitudes are often in the tens of thousands of kV or more, which will cause equipment damage and endanger personal safety, so it is necessary to conduct test studies on shock voltage. On the other hand, it is very meaningful to simulate the natural lightning phenomenon to carry out the study of discharge mechanism.
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II.Waveforms of various shapes
The impulse voltage generator can emit pulse waveforms of various shapes, but according to the needs of the test study, according to the relevant international standards and national standards, the main generation of the following impact voltage waveforms:
1.standard lightning impact waveform
2.standard operating impact waveform
3.other special impact voltage waveforms, such as special operation shock waves.
III.Main components of multistage impulse generator
1.SCR pressure regulating device
2.DC charging device
3.Impulse voltage generator
4.Multi-ball truncation device (optional)
5.Steep voltage device (optional )
6.Coupling divider
7.Tested object
8.Isolation impedance(optional)
9.Combined power supply(optional)
10 Current diverter
11.Control system
12. Measuring system
IV.Technical Parameter
1.Nominal stage : Can be customized,such as 300kV, 600kV, 1200kV, etc.
2.Rated voltage stage: Normally ±100kV
3.Rated Charging voltage: Normally ±100kV
4.Nominal energy: Can be customized,such as 10KJ, 20KJ, 30KJ, etc.
5.Total impact capacitance: Can be customized according to tested object
6.Impulse voltage waveform parameters
1) Standard lightning impulse voltage full wave:1.2±30%ms /50±20%ms,The amplitude is ±3%, The oscillation at the wave head is not more than 5% of the amplitude
2) Standard operating impact waveform
250±20%ms /2500±60%ms;Chopper waveform time :2~6mS
3)Impulse voltage waveform: Impulse voltage waveform>10%Un, synchronizing range ≤20%,Instability rate of output voltage ≤1.5%,Error rate of synchronous discharge <2%
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