Neutral-Point Potential Balance Control Strategy on Three-Level Active Power Filters

Table 3

Neutral-point current corresponding to different vectors.

Positive small vectors	iNP	Negative small vectors	iNP	Medium vectors	iNP
ONN	ia	POO	−ia	OPN	ia
NON	ib	OPO	−ib	PON	ib
NNO	ic	OOP	−ic	PNO	ic
OPP	ia	NOO	−ia	ONP	ia
POP	ib	ONO	−ib	NOP	ib
PPO	ic	OON	−ic	NPO	ic