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 Post subject: Power Factor Support in PVsystPostPosted: Tue Jul 25, 2017 7:08 pm

Joined: Wed Mar 01, 2017 10:45 pm
Posts: 3
I wanted to get an understanding of how power factor support is provided in PVsyst. I ran 2 cases (for same system design and loss assumptions with only difference being, case 1: had leading power factor of 0.98 and case 2 had leading power factor support of 0.95) to check the power factor feature in PVsyst and found that the apparent power output in both cases is different, which I would have thought to be same. I have attached the waterfall page for both cases for reference. Please let me know why is the apparent power difference in both cases and is PVsyst accounting for power factor support correctly.

 Attachments: File comment: Case 1: 0.98 pf Waterfall for 0.98 pf case.JPG [ 71.29 KiB | Viewed 5823 times ] File comment: Case 2: 0.95 pf Waterfall for 0.95 pf case.JPG [ 75.66 KiB | Viewed 5823 times ]
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 Post subject: Re: Power Factor Support in PVsystPostPosted: Wed Sep 13, 2017 6:52 pm

Joined: Tue Oct 16, 2012 11:37 am
Posts: 83
Location: Spain
It seems that in the 2nd case you don't have AC losses...

Anyway, I think that PVsyst only considers power factor in terms of Active = Aparent * cos (Phi). It does not take into account how the equipments, cables, etc... affect to reactive power.

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 Post subject: Re: Power Factor Support in PVsystPostPosted: Mon Sep 18, 2017 12:47 pm

Joined: Mon Apr 16, 2012 7:29 pm
Posts: 1686
This is quite normal. The produced energy at the output of the inverter is the Active energy.

The treatment of the Power factor is explained in detail in the Help, or in the FAQ Can I define a Power Factor in PVsyst ?

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 Post subject: Re: Power Factor Support in PVsystPostPosted: Tue Nov 05, 2019 1:08 am

Joined: Tue Oct 18, 2016 3:31 am
Posts: 340
Hello, I have a question on PF implementation and thought I would keep it in this post.

I have a Power Electronics central inverter which requires a 0.97 lagging PF. In PVsyst, do I select "limit in active power", or "limit in apparent power" on the "Grid Power Limitation" tab? Inverter Pnom is defined as apparent power.

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 Post subject: Re: Power Factor Support in PVsystPostPosted: Sun May 24, 2020 11:35 pm

Joined: Mon Apr 16, 2012 7:29 pm
Posts: 1686
This is a property of the inverter.

If the PNom is specified as apparent power [kVA], you should define "Inverter PNom defined as Apparent Power" in the Miscellaneous tools of course.

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