フライングキャパシタ形マルチレベルインバータを用いた直流給配電方式の基礎検討

抄録

In modern electrical power system, a lot of apparatus themselves are using or supplying dc power. However, conventional power networks are based on ac power and each apparatus has its optimal dc voltage level for better performance. Therefore, we now employ various types of converters in the network, such as ac/dc or dc/dc converters. Those power converters cannot avoid conversion loss inherently. This paper proposes a configuration of dc power network using a flying capacitor multilevel inverter. The multilevel inverter has an ac terminal and some dc terminals. It used to be considered as some applications where almost sinusoidal ac output is required without a bulk ac passive filter. The different dc voltage terminals are utilized as multiple dc terminals in the dc power supply network. It is also considered that each dc voltage level can be settled at the different value. A typical case operation is confirmed by simulation studies.