solaR (version 0.46)

C_fProd: Performance of a PV system

Description

Simulate the behaviour of a grid connected PV system under different conditions of irradiance and temperature. This function is used by the prodGCPV function.

Usage

fProd(inclin, module, generator, inverter, effSys)

Arguments

inclin

A '>Gef object, a zoo object or a data.frame. In case of being zoo or data.frame it must include a component named Gef (effective irradiance, W/m<U+00B2>) and another named Ta (ambient temperature, \(^{\circ}{\rm C}\)).

module

list of numeric values with information about the PV module,

Vocn

open-circuit voltage of the module at Standard Test Conditions (default value 57.6 volts.)

Iscn

short circuit current of the module at Standard Test Conditions (default value 4.7 amperes.)

Vmn

maximum power point voltage of the module at Standard Test Conditions (default value 46.08 amperes.)

Imn

Maximum power current of the module at Standard Test Conditions (default value 4.35 amperes.)

Ncs

number of cells in series inside the module (default value 96)

Ncp

number of cells in parallel inside the module (default value 1)

CoefVT

coefficient of decrement of voltage of each cell with the temperature (default value 0.0023 volts per celsius degree)

TONC

nominal operational cell temperature, celsius degree (default value 47).

generator

list of numeric values with information about the generator,

Nms

number of modules in series (default value 12)

Nmp

number of modules in parallel (default value 11)

inverter

list of numeric values with information about the DC/AC inverter,

Ki

vector of three values, coefficients of the efficiency curve of the inverter (default c(0.01, 0.025, 0.05)), or a matrix of nine values (3x3) if there is dependence with the voltage (see references).

Pinv

nominal inverter power (W) (default value 25000 watts.)

Vmin, Vmax

minimum and maximum voltages of the MPP range of the inverter (default values 420 and 750 volts)

Gumb

minimum irradiance for the inverter to start (W/m<U+00B2>) (default value 20 W/m<U+00B2>)

effSys

list of numeric values with information about the system losses,

ModQual

average tolerance of the set of modules (%), default value is 3

ModDisp

module parameter disperssion losses (%), default value is 2

OhmDC

Joule losses due to the DC wiring (%), default value is 1.5

OhmAC

Joule losses due to the AC wiring (%), default value is 1.5

MPP

average error of the MPP algorithm of the inverter (%), default value is 1

TrafoMT

losses due to the MT transformer (%), default value is 1

Disp

losses due to stops of the system (%), default value is 0.5

Value

If inclin is zoo or Gef object, the result is a zoo object with these components (if inclin is a data.frame the result is also a data.frame with these same components):

Tc

cell temperature, \(^{\circ}{\rm C}\).

Voc, Isc, Vmpp, Impp

open circuit voltage, short circuit current, MPP voltage and current, respectively, in the conditions of irradiance and temperature provided by Inclin

Vdc, Idc

voltage and current at the input of the inverter. If no voltage limitation occurs (according to the values of inverter$Vmax and inverter$Vmin), their values are identical to Vmpp and Impp. If the limit values are reached a warning is produced

Pdc

power at the input of the inverter, W

Pac

power at the output of the inverter, W

EffI

efficiency of the inverter

References

• Jantsch, M., Schmidt, H. y Schmid, J.: Results on the concerted action on power conditioning and control. 11th European photovoltaic Solar Energy Conference, 1992.

• Baumgartner, F. P., Schmidt, H., Burger, B., Br<U+00FC>ndlinger, R., Haeberlin, H. and Zehner, M.: Status and Relevance of the DC Voltage Dependency of the Inverter Efficiency. 22nd European Photovoltaic Solar Energy Conference, 2007.

• Alonso Garcia, M. C.: Caracterizaci<U+00F3>n y modelado de asociaciones de dispositivos fotovoltaicos. PhD Thesis, CIEMAT, 2005.

• Perpi<U+00F1><U+00E1>n, O, Energ<U+00ED>a Solar Fotovoltaica, 2015. (https://oscarperpinan.github.io/esf/)

• Perpi<U+00F1><U+00E1>n, O. (2012), "solaR: Solar Radiation and Photovoltaic Systems with R", Journal of Statistical Software, 50(9), 1-32, 10.18637/jss.v050.i09

See Also

fInclin, prodGCPV, fTemp.

Examples

# NOT RUN {
inclin = data.frame(Gef = c(200,400,600,800,1000),Ta = 25)

#using default values
fProd(inclin)

#Using a matrix for Ki (voltage dependence)
inv1 <- list(Ki = rbind(c(-0.00019917, 7.513e-06, -5.4183e-09),
c(0.00806, -4.161e-06, 2.859e-08),
c(0.02118, 3.4002e-05, -4.8967e-08)))

fProd(inclin, inverter = inv1)

#Voltage limits of the inverter
inclin = data.frame(Gef = 800,Ta = 30)
gen1 = list(Nms = 10, Nmp = 11)

prod = fProd(inclin,generator = gen1)
print(prod)

with(prod, Vdc * Idc / (Vmpp * Impp))
# }