Converter system having converter modules connected by a DC intermediate circuit, and method for operating such a system
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United States of America Patent
Stats
-
Mar 4, 2003
Grant Date -
Apr 11, 2002
app pub date -
Sep 28, 2001
filing date -
Oct 6, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A converter system has a number of individual converter modules, which are in the form of load converter modules or power supply system converter modules and are connected to one another via a DC voltage intermediate circuit which has two DC voltage busbars and a DC voltage intermediate circuit capacitance arranged between the DC voltage busbars. A defective converter module is isolated from a common intermediate circuit, in which interruption-free further operation of the other modules on the intermediate circuit is possible and in which the isolating means are not destroyed. The DC voltage intermediate circuit capacitance is subdivided into a number of parts corresponding to the number of converter modules. Each of the converter modules is associated with a portion of the DC voltage intermediate circuit capacitance and forms a local intermediate circuit. The converter modules are coupled together with their local intermediate circuits to the DC voltage busbars by at least one protective switch.
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