Documentation Home Page HYPERSIM Home Page
Pour la documentation en FRANÇAIS, utilisez l'outil de traduction de votre navigateur Chrome, Edge ou Safari. Voir un exemple.

3-Level NPC Converter (Switching Devices)


The 3-Level NPC Converter (Switching Devices) component is a three-phase power converter model developed from IGBT and diode elements. The converter is modeled with GTO/diode pairs controlled by firing pulses produced by a PWM generator. Normally used with time steps of 100 to 200 times smaller than the period of the carrier of the PWM generator, this component provides precise off-line simulation results. 

NOTEIn order to obtain accurate results, the option Activate iterative method in Simulation Settings must be selected when using this component.

Mask and Parameters

Parameter Name

Description

Unit

Variable = {Possible Values}

DescriptionUse this field to add all kinds of information about the component
Description = {'string'}
Diode on-state resistanceInternal resistance of the internal GTO/diodesOhmRclose  = { [1e-12, 1e12] }

Diode snubber resistance

Snubber resistance of the internal GTO/diodes

Ohm

Rsnubber = { [1e-12, 1e12] }

Diode snubber capacitance

Capacitance of the internal GTO/diodes

F

Csnubber = { [1e-12, 1e12] }

Ports, Inputs, Outputs and Signals Available for Monitoring

Ports

Name

Description

net_1

Network connector on the AC side (supports only 3-phase connections)

DCplus

Network connector on the DC side. The symbol + shows that this is the positive end (supports only 1-phase connections)

DCminus

Network connector on the DC side. The symbol - shows that this is the negative end (supports only 1-phase connections)

DCneutral

Neutral network connector (supports only 1-phase connections)

Inputs

Name

Description

P

Vectorized signal containing twelve firing pulses to control the converter

Outputs

Name

Description

V

Vectorized voltage signal containing the phase-to-ground voltages on the AC side (Va, Vb, and Vc) and the DC link (Vdc).

I

Vectorized current signal containing phase currents on the AC side (Ia, Ib and Ic) and the current of the DC link (Idc).

Sensors

Name

Description

Unit

P1

Gating signal controlling Q1.













P2

Gating signal controlling Q2.

P3

Gating signal controlling Q3.

P4

Gating signal controlling Q4.

P5

Gating signal controlling Q5.

P6

Gating signal controlling Q6.

P7

Gating signal controlling Q7.

P8

Gating signal controlling Q8.

P9

Gating signal controlling Q9.

P10

Gating signal controlling Q10.

P11

Gating signal controlling Q11.

P12

Gating signal controlling Q12.

Va

Voltage signal of phase A on the AC side of the converter.

V


Vb

Voltage signal of phase B on the AC side of the converter.

Vc

Voltage signal of phase C on the AC side of the converter.

Vdc

Converter DC link voltage signal.

Ia

Phase A current signal on the AC side.

A


Ib

Phase B current signal on the AC side.

Ic

Phase C current signal on the AC side.

Idc

Current signal of the DC link.

Additional Information

The converter is modeled by 12 IGBT/diodes controlled by firing pulses produced by a PWM generator. The figure below shows the internal circuit of the 3-Level NPC Converter (Switching Devices) using IGBT and diode elements.


The PWM generator outputs a vectorized gating signal to control the converter. The gating signal contains 12 firing pulses. The first four pulses control the Q1 to Q4 switching devices (phase A of the converter), pulses five to eight control the Q5 to Q8 switching devices (phase B of the converter), and the last four pulses control the Q9 to Q12 switching devices (phase C of the converter).


Limitations

This component must be used with the PWM Generator for 3-Level Converter (Switching Devices) 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, Three-Level NPC Converter Mathworks.com. https://www.mathworks.com/help/physmod/sps/powersys/ref/pvarray.html

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
Follow OPAL-RT: LinkedIn | Facebook | YouTube | X/Twitter