An active bus conditioner for a distributed power system

In a distributed power system with many power converters on the DC bus, there is always the concern of the possible interactions between the system building blocks, which are designed at the individual box level. This paper presents a novel concept, the DC bus conditioner, which compensates the harmonic and reactive current on the DC bus and actively damps the oscillations in a DC power system. With a certain amount of extra energy storage, the bus conditioner can provide the large signal variable frequency ripple current as required by the load and actively shape the small signal impedance characteristics of the DC bus interface at the mid-frequency range to increase the system stability margin. The breadboard experimental results are presented.