SYSTEMS AND METHODS FOR ENHANCED OPERATION AND PROTECTION OF POWER CONVERTERS

摘要

An electrical system includes an AC power source and a power converter including at least one first terminal and at least one second terminal. The first terminal is configured to receive voltages with a DC component and the second terminal is configured to receive voltages that have a non-zero time average value including AC and DC components. The electrical system also includes an AC power transmission subsystem coupled to and extending between the AC power source and the power converter. The electrical system further includes a current diversion system including a plurality of first switching devices coupled to the AC power transmission subsystem. The current diversion system also includes a second switching device including a third terminal coupled to the first terminal and a fourth terminal coupled to the second terminal. The second switching device is configured to transmit current only from the third terminal to the fourth terminal.

主权项

1. An electrical system comprising:
an alternating current (AC) power source; a power converter comprising at least one first terminal and at least one second terminal, wherein said at least one first terminal is configured to receive a voltage having a direct current (DC) component, and said at least one second terminal configured to receive a voltage having a non-zero average value including an AC component and a DC component; an AC power transmission subsystem coupled to and extending between said AC power source and said power converter; and a current diversion system comprising:
a plurality of first switching devices coupled to at least a portion of said AC power transmission subsystem; andat least one second switching device comprising a third terminal coupled to said at least one first terminal and a fourth terminal coupled to said at least one second terminal, wherein the voltage between said at least one first terminal and said at least one second terminal has a positive time average value including an AC component and a DC component, said at least one second switching device configured to transmit electric current only from said third terminal to said fourth terminal.