Circuit for monitoring the current distribution in...

Details Circuit for monitoring the current distribution in... Circuit for monitoring the current distribution in...

H - Electricity

02

H

321/24, 324/59

H02H 7/12 (2006.01) G01R 19/10 (2006.01) H02H 3/36 (2006.01)

Patent

CA 1126820

ABSTRACT A circuit arrangement for monitoring the current inbalance in two parallel-connected converter branches, each of which includes at least two series-connected converter valves. The anodes and cathodes, respectively, of adjacent converter valves in a given branch are connected together via cross-connections containing current transformers. A differential current transformer is provided at the output junction point of the two converter branches. Starting with the output signal of the differential current transformer, the exact current misdistribution for each adjacent converter valve pair is determined via summing amplifiers by adding the currents of the transverse transformers. A protective measure is triggered if a current misdistribution occurs.

321734

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