functions.dc.power: DC circuits and power calculations

In renpow: Renewable Power Systems and the Environment

Description

Calculates and plots DC V-I response as well as transient response

Usage

resistor(V,R)
ivplane(x, x0 = FALSE, y0 = FALSE)
diode(V)
vsource(Voc,Rs)
isource(Isc,Rp)
PVcell(x.PVcell)
PVcell.plot(y.PVcell)
eff.pow(x.eff.pow)
transient(ys, tau, ylabel, yslabel)
fuel.cell(x.fcell)

Arguments

V	Voltage
R	Resistance
x	Result of function resistor, diode, vsource, or isource
x0	Logical argument to plot2axis
y0	Logical argument to plot2axis
Voc	Open circuit voltage
Rs	Series resistance
Isc	Short circuit current
Rp	Parallel resistance
x.PVcell	list(I0.A, Isc.A, Area, Rs, Rp, Light)
y.PVcell	output of PVcell
x.eff.pow	list(Rth,Voc)
ys	Source for transient calculation
tau	Time constant
ylabel	y axis label for transient plots
yslabel	Source label for transient plots
x.fcell	list(area.cm2,Rload.ohm)

Details

Object x contains all the calculated values which can be passed to function ivplane to plot the graphs.

Value

V	Voltage
I	Current
P	Power
txt	labels
Light	Light levels from PVcell

Note

Functions used in Chapter 3 and Chapter 5 of Acevedo (2018)

Author(s)

Miguel F. Acevedo [e-mail]

References

Acevedo, M.F. 2018. Introduction to Renewable Electric Power Systems and the Environment with R. Boca Raton, FL: CRC Press. (ISBN 9781138197343)

Irwin, J.D. and R.M. Nelms. 2011. Basic Engineering Circuit Analysis. 11th edition. 2011: Wiley.

Examples

# from Chapter 3
# resistors
V <- seq(-0.2,1,0.01) # volts
x <- resistor(V,R=1)
ivplane(x)

# diode
V <- seq(-0.1,0.6,0.01) # volts
x <- diode(V)
ivplane(x)

# voltage source
x <- vsource(Voc=24,Rs=1)
ivplane(x)
# current source
x <- isource(Isc=20,Rp=1)
ivplane(x)

# PV cell
x <- list(I0.A=1, Isc.A=40, Area=100, Rs=0.05, Rp=1, Light=1) 
# units: I0.A pA/cm2 Isc.A mA/cm2 Area cm2 Rs  ohm Rp  ohm
X <- PVcell(x)
ivplane(X,x0=TRUE,y0=TRUE)

# efficiency of power transfer
x <- list(Rth=1,Voc=24)
eff.pow(x)

# from Chapter 5
# RC circuit transient
R=0.2;C=1 # Mohm and uF
transient(ys=12,tau=R*C,ylabel="Vc(t) [V]",yslabel="Vs [V]") 

# RL circuit transient
R=20;L=1; # kohm and mH
transient(ys=12/R,tau=L/R,ylabel="iL(t) [A]",yslabel="Vs/R [V]") 

# Chapter 6 fuel cells
x <- list(area.cm2=15,Rload.ohm=NA)
fuel.cell(x)
x <- list(area.cm2=15,Rload.ohm=0.5)
fuel.cell(x)

renpow documentation built on May 1, 2019, 6:49 p.m.