NR’s±535kV/3000MW VSC-HVDC Converter Valve Passed DNV GL Verification and Witness Test

On April 15th 2017, NR has made new breakthrough in VSC-HVDC field, that its ±535kV/3000MW VSC-HVDC Converter valve has passed DNV GL(formerly KEMA) verification and witness test.

This converter valve is highest VSC-HVDC voltage level and largest capacity in the world up to date. The type test is fully compliance with IEC 62501(2014 Edition). The converter valve withstood 37.3kA short circuit current and completed wet DC withstand voltage test on one tower.

Converter valve is key equipment of VSC-HVDC, but the high voltage, mass capacity valve is always limited by application of IGBT, electromagnetic interference under large current condition and etc.

Base on its strong technology background and vast project experience, NR successfully resolved these problems and developed its reliable and state of the art high voltage, mass capacity converter valve.

This breakthrough will give a great push to application of VSC-HVDC and NR will keep on contributing its strength in this field.