Circuit for monitoring the current distribution in parallel-conn

Details Circuit for monitoring the current distribution in parallel-conn Circuit for monitoring the current distribution in parallel-conn

1979-01-31

1980-10-14

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific quantity comparison means

340645, 363 54, 363 69, H02H 328

Patent

active

042284775

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.

REFERENCES:
patent: 3205423 (1965-09-01), Kanngiesser
patent: 3806906 (1974-04-01), Young

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