Paralleling of active filters with independent controls

摘要

A parallel filter arrangement with at least two filters supplying current in line side sensing configuration and a number of sensors for measuring current. The sensors are used to determine the amount of current being supplied by the filters and the amount of current being supplied by a source. The filters adjust their supplied current in order to reduce or eliminate the amount of reactive or harmonic current being supplied by a source.

主权项

1. A method of reducing circulating current between two line side sensing electronic active filters in an electrical system including a current source supplying current to a load, the method comprising:
sensing a current from the source; generating a first current component and a second current component; sensing the first current component and the second current component; determining a difference between the first current component and the second current component; comparing the difference, the current from the source and a filter reference signal to arrive at a comparison; adjusting the first current component using the comparison and the sensed first current component; and adjusting the second current component using the comparison and the sensed second current component.