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Boost Converter (Switching Function)


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.

NOTEIn 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.

I[Iout]

Current signal from the AC side.

A


I[Iin]

Current signal from the DC side.

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.comhttps://www.mathworks.com/help/physmod/sps/powersys/ref/boostconverter.html 

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


See Also

OPAL-RT TECHNOLOGIES, Inc. | 1751, rue Richardson, bureau 1060 | Montréal, Québec Canada H3K 1G6 | opal-rt.com | +1 514-935-2323
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