Rectifier with switches of asymmetric voltage breakdown...

Details Rectifier with switches of asymmetric voltage breakdown... Rectifier with switches of asymmetric voltage breakdown...

H - Electricity

01

L

321/24, 321/91

H01L 21/04 (2006.01) H02M 7/19 (2006.01)

Patent

CA 1060095

RECTIFIER WITH SWITCHES OF ASYMMETRIC VOLTAGE BREAKDOWN STRENGTHS ABSTRACT OF THE DISCLOSURE A rectifier for a medium voltage rectifier system as well as for high voltage-direct current transmission includes a plurality of thyristor switches. The switches have asymmetric voltage breakdown strengths, the asymmetry being at least 10% less for the forward blocking direction compared with the reverse blocking direction. The thyristor switches are dimensioned voltage-wise to safely block even long lasting overvoltages in both the forward and reverse blocking directions occurring during operation and to withstand momentary surge and switching voltages limited by an overvoltage suppressor in the reverse blocking direction.

236969

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