The Full-bridge converter (Switching Function) 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
1	Network connector on the AC side (supports only 1-phase connections)
2	Network connector on the AC side (supports only 1-phase connections)
DCplus	Network connector on the DC side. The sign "+" indicates the positive side (supports only 1-phase connections)
DCminus	Network connector on the DC side. The sign "-" indicates the negative side (supports only 1-phase connections)

Inputs

Name	Description
P	Vectorized signal containing four firing pulses to control the converter

Outputs

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

Sensors

Name	Description	Unit
P[P1]	Gating signal to control Q1.
P[P2]	Gating signal to control Q2.
P[P3]	Gating signal to control Q3.
P[P4]	Gating signal to control Q4.
V[Vac]	Tension signal on the AC side from the converter.	V
V[Vdc]	Tension signal on the DC side from the converter.	V
I[Iac]	Current signal from the AC side.	A
I[Idc]	Current signal from the DC side.	A

Additional Information

The converter is modeled by a switching function model. The switches are replaced by two voltage sources and two diodes 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 firing pulses produced by a PWM generator or by firing pulses averaged over a time step of the simulation (1 / Ts), providing signals between 0 and 1 (see PWM Average Generator for Full-Bridge Converter (Switching Function)). Both operating modes produce harmonics. This converter model correctly simulates the operation as a rectifier as well as the blanking time.

Limitations

This model must be used with the PWM Average Generator For Full-Bridge Converter component available in the Control Sources library of HYPERSIM 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, Full-Bridge Converter Mathworks.com. https://www.mathworks.com/help/physmod/sps/powersys/ref/fullbridgeconverter.html

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

HYPERSIM Documentation

Full-Bridge Converter (Switching Function)