System and method for reducing reactive current in power converter burn-in tests

A method for burn-in testing of a power converter, comprising:

• coupling a power converter to the DC output of an emulator configured to simulate a DC power source, the emulator configured to receive an AC input from a transformer and provide a DC output to the power converter, the power converter configured to provide an AC output to the transformer,
• providing AC power to the transformer from an AC feeder line;
• monitoring the current flowing through the AC feeder line;
• controlling one or more of the output of the emulator or the power converter to reduce the reactive current in the AC feeder line;
• and,
• conducting at least one burn-in test of the power converter.

A burn-in test system comprising:

• an emulator and a power converter coupled in a two-unit circulating configuration, said emulator providing a DC output to the power converter, said power converter providing an AC output that is couplable to an AC input of said emulator;
• an AC feeder line configured to supply power to the two-unit circulating configuration;
• and,
• a control system configured to adjust the output of one or more of the emulator and power converter to reduce reactive current flowing in the AC feeder line.