Hi,
You can use control and control function library to generate 6 pulses required for the converter.
Also, we have developed 3-phase inverter model including its controller. This model is added to Microgrid library which is available on our website (http://www.emtp-software.com/site/file.php?id=134).
The inverter model includes both detailed and average model. You can select the detailed model and have a look at subcircuit for the pulse generator.
Thanks
Regards
Boopathi