EXERCISE 2: Closed-Loop Controller Design and Simulation of H-bridge

DC/AC Inverter with PV

Objectives:

- Getting familiar how a PV source operates when interfaced with an H-bridge PV Inverter

Author: Babak Parkhideh, PhD

You need to take the "PV Array" block from the Simulink Library. Choose the SolarWorld Sunmodule

Plus SW 250 mono Black from the Module data drop-down list. We use only one panel throughout the

lab.

First, consider the nominal operating points defined in the PV panel datasheet (mentioned in the Simulink

interface too). Use the nominal parameters you have chosen in Exercise 1. You need to consider a DC

link capacitor in parallel to the PV panel. Make sure the DC link voltage ripple in less than 2V at the

nominal operating point.

Construct the closed-loop feedback simulation model of the inverter interfacing with the PV array. If you

have constructed the model in the previous labs, update the model. You can use the architecture shown

below. Use the PID block in Simulink. Choose a proper Time Domain you have worked with, Continuous

vs. Discrete.

+

Note that the modulation index must be sinusoidal to generate a 60Hz output. Make sure the compensator

output is multiplied by Sin(2pi60t). Or, use the dq transformation or similar to extract the rms or mean

value of the current. Multiply the current controller output by Sin(2pi60t).

DC Link Voltage-

Reference

(PV Voltage)

PID

lac-ret

Revised 10/04/2021

Duty cycle

Page 4 of 6

Current

Controller

PWM

PV Inverter

DC link Voltage, Voc