CONTROL METHODS FOR POWER CONVERTERS

摘要

A method of operating a power converter arrangement, the power converter arrangement includes a dc link and a dc load/source, an active rectifier/inverter having dc terminals connected to the dc link and is adapted to provide a variable dc link voltage between a maximum and a minimum limits, an interleaved buck converter having a plurality of converter circuits connected between the dc link and the dc load/source, wherein each converter circuit includes a first switch, a second switch, and a reactor, the method including determining one or more null values of dc link voltage with reference to the voltage across the dc load/source, and if a null value of dc link voltage is between the maximum and the minimum limits, controlling the active rectifier/inverter to provide a dc link voltage that is substantially the same as the null value of dc link voltage.

主权项

1. A method of operating a power converter arrangement comprising a dc link, a dc load/source, an active rectifier/inverter comprising dc terminals connected to the dc link and configured to provide a variable dc link voltage V1 between a maximum and a minimum limits, and an interleaved buck converter comprising N converter circuits connected between the dc link and the dc load/source, wherein each of the N converter circuits comprises a first switch, a second switch, and a reactor, the method comprising:
determining one or more null values of dc link voltage V1,null with reference to the voltage V2 across the dc load/source according to the equation:V1,null=V2·Na where:
N is a positive integer greater than or equal to 2, anda is a positive integer less than N; and if a null value of dc link voltage is between the maximum and the minimum limits of the dc link voltage, controlling the active rectifier/inverter to provide a dc link voltage that is substantially the same as the null value of dc link voltage.