The boost converter (Switching Function) can be used in applications such as the integration of renewable energy sources. It models of a single-phase power converter of the VSC (Voltage Source Converter) type. This converter is modeled using a switching function suitable for real-time simulation. The switching function offers a good compromise between the real-time performance of an average model and the accuracy of using detailed switches by preserving the harmonic content of a switching device.

NOTE: In order to obtain accurate results, the options Activate iterative method and Solve control inputs before solving power in Simulation Settings must be selected when using this component.

Mask and Parameters

Parameter Name	Description	Unit	Variable = {Possible Values}
Description	Use this field to add all kinds of information about the component		Description = {'string'}
Diode on-state resistance	Internal resistance of diodes	Ohm	Rclose = { [1e-12, 1e12] }
Diode snubber resistance	Snubber resistance of the diodes	Ohm	Rsnubber = { [1e-12, 1e12] }

Ports, Inputs, Outputs and Signals Available for Monitoring

Ports

Name	Description
In	Network connector on the AC side (supports only 1-phase connections)
Out	Network connector on the DC side. This is the positive end (supports only 1-phase connections)
COM	Network connector on the DC side. This is the negative end (supports only 1-phase connections)

Inputs

Name	Description
P	Signal containing a firing pulse to control the converter

Outputs

Name	Description
V	Vectorized voltage signal containing the voltage from the AC (Vac) side and the DC link (Vdc).
I	Vectorized current signal containing the current from the AC (Iac) side and the DC link (Idc).

Sensors

Name	Description	Unit
P	Gating signal to control Q1.
V[Vout]	Voltage signal from the AC side of the converter.	V
V[Vin]	Voltage signal from the DC side of the converter.	V
I[Iout]	Current signal from the AC side.	A
I[Iin]	Current signal from the DC side.	A

Additional Information

The converter is modeled by a switching function model. The switches are replaced by a voltage source and a diode on the AC side and a current source on the DC side.

The figure below shows the internal circuit of the converter that can be accessed by opening the subcircuit.

The converter is controlled by pulses produced by a PWM generator or by pulses averaged over a calculation step of the simulation (1 / Ts) (see PWM Average Generator for Full-Bridge Converter (Switching Function)), providing signals between 0 and 1. Both operating modes produce harmonics (which is the case when a converter is controlled by a PWM generator). This converter model correctly simulates the operation as a rectifier as well as the blocking time.

Limitations

This model must be used with the P1 gating signal of the PWM Average Generator for Full-Bridge Converter (Switching Function) component or with an input FPGA module (contact our technical support for an example).

This model does not participate in the load flow solution.

References

MathWorks, Boost Converter Mathworks.com. https://www.mathworks.com/help/physmod/sps/powersys/ref/boostconverter.html

M. H. Rashid, Power electronics handbook, 4^th ed. Butterworth-Heinemann, 2017

HYPERSIM Documentation

Boost Converter (Switching Function)