As the core component of flexible HVDC transmission converter valves

DC-link capacitors have not yet been tested and verified in valve section operating conditions. Through research on the operation of the converter valve components under current laboratory conditions

it has been determined that the circuit topology of towing operation mode between the test valve section and the accompanying valve section can meet the requirements of constructing the verification test circuit. Through simulation analysis and system testing

it is proved that at least 5 sub modular need to be connected in series for each valve section of the circuit to verify the normal operation

while meeting the requirements of economy and practicality. Considering that the test circuit needs to conduct operational tests on capacitors of different models and specifications

the stacked busbar adopts a special design to facilitate parameter measurement and capacitor replacement.