Control method for parallel redundant power system
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United States of America Patent
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app pub date -
Sep 5, 2008
filing date -
Oct 2, 2003
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Abandoned
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Abstract
A method for controlling the power system is presented. The power system is composed of at least one inverter for supplying AC power to a load through a bus, a phase lock system to synchronize all output voltages of the inverters and a current sharing circuit to properly distribute the load current among all inverters. Each inverter is controlled by an unbalanced power to limit the increase of its cross current. Moreover, the information related to DC bus voltage is further applied to control the inverters, whereby the cross current is mitigated and entire power system is operated steadily.
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