From 1443223595b2dab68f586cdcc2f5bb06cbbf8a68 Mon Sep 17 00:00:00 2001 From: Michael Wetter Date: Wed, 3 Jan 2024 13:39:35 -0800 Subject: [PATCH] Revised documentation, fixed capitalization of image --- IBPSA/Electrical/DC/Sources/PVSingleDiode.mo | 55 ++++++++++++------ ...ode_scheme.PNG => single_diode_scheme.png} | Bin 2 files changed, 37 insertions(+), 18 deletions(-) rename IBPSA/Resources/Images/Electrical/DC/Sources/{single_diode_scheme.PNG => single_diode_scheme.png} (100%) diff --git a/IBPSA/Electrical/DC/Sources/PVSingleDiode.mo b/IBPSA/Electrical/DC/Sources/PVSingleDiode.mo index 5624413327..551b713d7c 100644 --- a/IBPSA/Electrical/DC/Sources/PVSingleDiode.mo +++ b/IBPSA/Electrical/DC/Sources/PVSingleDiode.mo @@ -58,33 +58,52 @@ equation annotation (Icon(coordinateSystem(preserveAspectRatio=false)), Diagram( coordinateSystem(preserveAspectRatio=false)), Documentation(info=" -

This is a photovoltaic generator model based on a single diode approach with replaceable thermal models accounting for different mountings.
-The solar cell is approximated as a simplified diode circuit following the scheme illustrated in the following:

-

Single Diode Scheme

-

In the figure, Iph denotes the photocurrent and Id is the dark current.

-

Id is opposed to Iph

-

Id derives from the Shockley equation

+

+This is a photovoltaic generator model based on a single diode approach with replaceable thermal models accounting for different mountings. +

+

+The solar cell is approximated as a simplified diode circuit following the scheme illustrated in the following: +

+

Single Diode Scheme +

+

+In the figure, Iph denotes the photocurrent and Id is the dark current. +

+

+Id is opposed to Iph

+

+Id derives from the Shockley equation

-Id = -Is(e((U+IRs) ⁄ a)-1)

-

that bases on the saturation current Is.

-

The Shockley equation uses the modified ideality factor

+Id = Is(e((U+IRs) ⁄ a)-1)

+

+that is based on the saturation current Is. +

+

+The Shockley equation uses the modified ideality factor +

a =(Ns nI k Tcell ⁄ q).

-

The modified ideality factor a results from the number of serial cells Ns, +

+The modified ideality factor a results from the number of serial cells Ns, the ideality factor nI, the Boltzman constant k, the elementary charge q,and the cell temperature Tcell. -Rs is the serial resistance that results in a voltage loss.

-

The parallel resistance Rsh accounts for the leakage currents along the cell's side +Rs is the serial resistance that results in a voltage loss. +

+

+The parallel resistance Rsh accounts for the leakage currents along the cell's side and Ish is the resulting leakage current. The result is the I-V-curve

-I = -Iph - Id - Ish
+I = +Iph - Id - Ish = Iph - Is (e((U+IRs) ⁄ a)-1) - (U+IRs) ⁄ Rsh

-

that bases on five unknown parameters (Iph, Is, a, Rs, and Rsh) only.
-Hence, the name 5-p approach is common.

-



For a definition of the parameters, see the IBPSA.BoundaryConditions.UsersGuide.

+

+that is based on five unknown parameters (Iph, Is, a, Rs, and Rsh) only.
+Hence, the name 5-p approach. +

+

+For a definition of the parameters, see the IBPSA.BoundaryConditions.UsersGuide. +

References

Humada, Ali M. ; Hojabri, Mojgan ; Mekhilef, Saad ; Hamada, Hussein M.: Solar diff --git a/IBPSA/Resources/Images/Electrical/DC/Sources/single_diode_scheme.PNG b/IBPSA/Resources/Images/Electrical/DC/Sources/single_diode_scheme.png similarity index 100% rename from IBPSA/Resources/Images/Electrical/DC/Sources/single_diode_scheme.PNG rename to IBPSA/Resources/Images/Electrical/DC/Sources/single_diode_scheme.png