Research on the Comparison Analyses of Three-Phase Discrete and Integrated LC Filters in Three-Phase PV Inverter

Table 1

The comparison of the discrete filter inductors and integrated filter inductors.

	The volume of magnetic core	The cost	The three phase coupling	Current ripple influenced by the other two phases
Discrete filter inductor	Large	Large	Decoupling	Not influenced
Integrated filter inductor (five limbs)	Medium	Medium	Can be adjusted to decoupling	Can be adjusted to not influenced
Integrated filter inductor (three limbs)	Small	Small	Coupling	Influenced