Control Strategy of Three-Phase Photovoltaic Inverter under Low-Voltage Ride-Through Condition

Table 1

Parameters of photovoltaic inverter system.

Category	Name	Parameter
System parameters	Maximum DC voltage	1000
	Maximum DC power	560 kWp
	DC voltage range with MPPT	480~880
	Maximum current output	1167 A
	Startup DC voltage	520
	Rated power output	500 kW
	Rated grid voltage	315
	Total harmonic distortion of current	<2% (rated power output)
	DC component of current	<0.5% (rated current output)
Filter parameters	Inductance value of	100 uH
	Inductance value of	50 uH
	Capacitance values for	200 uF (Δ-connected)
	The resonant frequency of LCL	1125 Hz
Other parameters	Capacitance values for	25.12 mF
	Switch frequency of IGBT	3000 Hz
	Sample frequency	10000 Hz