Active Elimination of DC Bias Flux in Series DC Active Filter Coupling Transformer

摘要

The Medium-voltage DC amplifier is a thyristor based power converter with a series DC active filter that provides a highly controllable and responsive platform to establish a high power dc bus. Having bulk power flow through the thyristor converter offers an economical and high power density solution over PWM converters. By designing the system to meet standards requested by the US Navy for the Next Generation Intelligent Power System, this paper will show a platform applicable to many high power DC microgrid fields. In particular, there are promising applications in mobile mining equipment, electric aircraft and ships. This paper proposes a novel control technique to actively mitigate the DC flux that is generated by the load current. This control approach yields significant reductions in the core volume and required transformer turns. The proposed solutions will be evaluated in a 4 kVA 400 V_(DC) laboratory scale test-bed.