The DC output voltage from PV is boosted up to desired level using Boost converter. This DC voltage is converted into three phase AC using PWM based inverter. How do I compute or justify the energy loss in the converters (boost converter, inverter)?
Dear Pavan,
In order to compute the overall efficiency, you can use an efficiency of 85% for the boost converter and 93-97% for the inverter, but it depends on the equipment you intend to use in your facility.
To develop a more accurate calculation of power losses, remember to add the power loss due to solar cables, AC cables and any other equipment to be included in your design.
Some examples:
http://www.ti.com/lit/an/slva372c/slva372c.pdf
http://pdf.wholesalesolar.com/inverter%20pdf%20folder/MS-PAE-Sheet.pdf?_ga=1.184912169.1628533089.1445321628
http://files.sma.de/dl/21567/SB5000SE-DEN1441web.pdf
Best regards and hope it helps,
Ganimedes
have new ideias
dont use inverter. use new 380Vdc bus system:
http://www.starlinepower.com/busway/uploads/docs/en/380V%20DC%20eco-system%20development%20present%20status%20and%20future%20challenges%20submission.pdf
its a very good system 380V dc bus system Ricardo de campos Barreto. Thanks for sharing the information currently my work status is in such position that i cannot reframe it. I can still use the idea you have shared... Thank you
You have a two stage topology of grid connected inverter. In order to justify the efficiency of the whole system you can study each converter separately. It is worth to obtain conduction and Switching losses to have an acceptable estimation of the efficiency.
The following is the link to download my PhD thesis were you can find some ideas and references to compute and justify the losses of a two stage PV generation topology. This work is devoted to a two stage microinverter.
https://tel.archives-ouvertes.fr/tel-01146805/
Best regards.
to calculate the conversion efficiency you need firstly to determine the average isolation per the period of study let us say one year . this factor depends on the location and weather the PV modules are fixed or they are managed by tracking system. you can use the http://rredc.nrel.gov/solar/calculators/PVWATTS/version1/ to calculate this factor. Then, the overall efficiency = the AC output energy (Ea.c) / extracted energy PV (Epv) .
- Badges
- Science topic
- Similar topics
- Engineering
- Electrical Engineering