DC-BUS CONTROLLER FOR GRID-CONNECTED DC/AC CONVERTERS

摘要

Systems, methods, and devices for controlling a DC-bus voltage for a power conditioning system. A control system regulates the DC value of the DC-bus voltage. The control system uses an adaptive DC-value estimator/observer to estimate this DC-value. Instead of having to determine the DC-value of a signal with a low frequency ripple without compromising the signal's dynamic response, a suitably precise estimate for that DC-value is used.

主权项

1. A control system for use in controlling a converter, the control system comprising:
a voltage controller for controlling a voltage of said converter; a current controller for controlling a current of said converter; an observer/estimator for estimating a DC-bus voltage of said converter;wherein
an estimate of said DC-bus voltage is subtracted from a measured DC-bus voltage of said converter; said current controller produces a value used to control a timing of opening and closing of switches in said converter.