Table 3 Simulation parameters.

S_w (Freq)

Switching frequency

10,000 Hz

S_w (Period)

Switching period

0.0001 s

T_s (Control)

Control sampling time

20 µs

T_s (Power)

Power simulation step size

5 µs

V_mp

Voltage at max power of 1 panel

29.7 V

I_mp

Current at max power of 1 panel

6.73 A

Npp

Number of parallel panels

10

Nss

Number of series panels

7

V_mpp

Total voltage at max power

207.9 V

I_mpp

Total current at max power

67.3 A

P_mpp

Max power of PV array

13,992 W

P_nom

Nominal power

13,992 W

U_nom

Line-to-line voltage (RMS)

400 V

V_nom

Phase voltage (RMS)

230.94 V

V_peak

Phase voltage (peak)

326.6 V

F_nom

Grid frequency

50 Hz

R_{f_pu}

Filter resistance in p.u.

0.0015

L_{f_pu}

Filter inductance in p.u.

0.15

P_base

Base power for p.u. system

11.435 kW

R_f

Filter resistance

0.017153 Ω

L_f

Filter inductance

0.00546 H

mi

Modulation index

0.85

V_dc^*

DC-link voltage reference

769 V

C_link

DC-link capacitance

709.8 µF

V

Input voltage

207.9 V

I

Input current

67.3 A

P

Input power

13,992 W

D

Duty cycle

0.73

R

Load resistance

42.375 Ω

I_{L_max}

Max inductor current

67.125 A

I_{L_ripp}

Inductor ripple current

0.02 A

Delta_I_L

Peak-to-peak ripple current

1.3425 A

F_sw

Switching frequency

5000 Hz

L

Inductance

22.61 mH

r_L

Inductor resistance

0.015 Ω

V_ripp

Output voltage ripple

0.05 V

Delta_V

Peak-to-peak output ripple

38.45 V

C_in

Input capacitance

350.07 µF

C_out

Output capacitance

68.998 µF

V_dc

k_p

DC voltage controller proportional gain

2

k_i

DC voltage controller integral gain

400

I_dq

k_p

Current controller proportional gain

0.3

k_i

Current controller integral gain

20

PLL

k_p

PLL proportional gain

180

k_i

PLL integral gain

3200