Table 1: Output voltage of different control strategy in linear load state.

Load	Voltage	Double circle control	Compound Control
Impedance	Output value of voltage (V)	218.7V	220.2V
	Output voltage THD (%)	0.85	0.53
Inductance	Output Value of voltage (V)	217.6V	223.2V
	Output value of voltage THD(%) (V)	1.26	0.64
Capacitive	Output voltage (V)	216.8V	223.7V
	Output voltage THD(%)	1.33	0.56