Abstract: The basic structure of 7200kV/480kJ impulse voltage generator used in the UHVDC test base of SGCC is presented in the paper. The output performance of lightning impulse, standard operating impulse and 500μs and 1000us long wave front operating impulse voltage are tested. Test results show that the voltage amplitude of lightning impulse reaches 6271kV; withstand and breakdown voltage amplitudes reach 3844kV and 4845kV respectively. The 7200kV/480kJ impulse voltage generator can satisfy the requirements for ±800kV UHVDC and even higher stage UHVDC research work.
Key words: impulse voltage generator, lightning impulse, operating impulse, long wave front
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