Please refer the 'Three-Level IGBT PV Inverter Reference Design' from link below,
Design Examples are available in Intel Design Store,
If you have any different issue, please let me know.
URL provided in attached file will work on Quartus version 14.1 & later, it`s clearly mentioned in installation package description, also mentioned that download design templates from Design store.
'Moreover, how do I find a template of FPGA program for 'Three-Level IGBT PV Inverter Reference Design'?
Could you send me the direct URL?' ---------- It is also mentioned over there refer the below link :To request this reference design, contact your local sales representative.
Please refer the link below for Intel Authorized Distributors and Approved Suppliers & filter it out for your location,
let me know, if this has helped to resolve your issue.