Simulation of current voltage i v and power

Modeling the PV products, if the range of unknown variables increases the answers are away from getting the ideal kind. Most of the manufacturer’s datasheets tend not to provide adequate facts about the parameters which will depends on climate. There are five parameters (, A, ) are considered depends on the irradiation and cell heat. Ideality component (A) is usually chosen 1 ) 3 to get silicon. [2]

The output in the PV module is unpredictable when climate changes. Therefore the proper nonlinear methods such as Simple fixed point method, Newton-Raphson technique, and Secant method ought to be used for this kind of unstable conditions. In this suggested model Newton-Raphson method is picked.

(20)

In which is the actual volume of the function, is the derivation of the function, is the current amount and is the next amount. Newton-Raphson approach needs one particular iteration cycle which carries on its procedure, until the blocking point state is met.

(21)

Depends upon what saturation, the stopping state by two different ways is usually:

(1) After the pre-specified amounts of iteration is carried out

(2) When the present error which can be received by Formula (21) is less than the pre-specified error. [5]

Parameters Principles

Maximum Electrical power (Pmax) 50W

Power Patience 3%

Maximum Power Volt quality (Vmp) seventeen. 9V

Maximum Power Current (Imp) installment payments on your 79A

Wide open Circuit Ac electricity (Voc) 22. 1V

Short Current (Isc) 2 . 97A

Maximum Program Voltage 1000VDC

Operating Temp -40ËšC to + 85ËšC

Product Application Class A

Weight some. 5KG

Sizing 760x510x30mm

Every technical info at regular test circumstances: AM sama dengan 1 . your five

G=1000W/m, T=25ËšC.

5. MATLAB SCRIPT APPLY FOR PV COMPONENT

%%Information from the RL-6P050/18 solar module datasheet %%

clear, clc

Vocn sama dengan 22. one particular, %Nominal open-circuit voltage (V)

Iscn = 2 . 97, %Nominal short-circuit current (A)

Vmp = 17. being unfaithful, %Maximum volts (V)

Imp = installment payments on your 79, %Maximum current (A)

Eg sama dengan 1 . doze, % Strap gap strength (eV)

Np = one particular, % Volume of parallel cellular material

Ns sama dengan 36, % Number of series cells

Pmax_e = Vmp*Imp, %Module maximum output electric power (W)

Ki = zero. 0013, % Temperature agent of current (A/K)

Kv = -0. 0079, %Temperature coefficient of voltage (V/K)

Gn = 1000, % Nominal irradiance (W/m)

Tn = 298, %Nominal operating temperature (K)

Tc sama dengan Ta+273, % Cell heat (K)

%% Constants %%

k sama dengan 1 . 3805*10^(-23), % Boltzmann constant (J/K)

q sama dengan 1 . 6021*10^(-19), % Electron charge (C)

A = 1 . 3, % Diode ideality aspect

Vtn sama dengan (k*Tn)/q, % Thermal verse voltage (nominal)

Vt sama dengan (k*T)/q, %Thermal junction voltage (current temperature)

G = input (G: ), % Actual irradiance (W/m)

Tag = input (Ta: ), % Real temperature (K)

%% Research values of Rs and Rp %%

Rs_max sama dengan (Vocn-Vmp)/Imp

Rp_min = Vmp/(Iscn-Imp)-Rs_max

Rs sama dengan 0, %Initial value of Rs

Iph = (Iscn+Ki*(T-Tn))*G/Gn, %Nominal photocurrent (A)

Ion = Iscn/ (exp(Vocn/(A*Ns*Vt))-1), %Nominal diode saturation current (A)

Io = Ion*(Tc/Tn)^(3)*exp((q*Eg)/(k*A)*(1/Tn-1/Tc))

% Diode change saturation current (A)

problem = Inf, %dummy benefit

%% Iterative process pertaining to Rs and Rp right up until Pmax = Pmax, ex lover %%

when (error>zero. 001)

Rs = Rs+0. 01, %Increment Rs

Rp= (Vmp+(Imp*Rs))/(Iscn-(Iscn*exp((Vmp+(Imp*Rs)-(Vocn)/(A*Ns*Vt)))+(Iscn*exp(-Vocn/(A*Ns*Vt)))-(Pmax_e/Vmp), % Shunt level of resistance

V sama dengan 0: zero. 1: 55, % Voltage vector

We = zeros (1, size(V, 2)), % Current vector

%% Resolve with Newton-Raphson method %%

for t = one particular: size(V, 2)

g(j)=Np*Iph-I(j)-Np*Io*exp((V(j)+(I(j)*Rs))/(A*Ns*Vt) -1)-((Np/Ns*V(j))+(I(j)*Rs))/Rp

while (abs(g(j))>0. 001)

g(j)=Np*Iph-I(j)-Np*Io*exp((V(j)+(I(j)*Rs))/(A*Ns*Vt) -1) ((Np/Ns*V(j))+(I(j)*Rs))/Rp

f(j) = -1-(Np*Io*Rs)/(A*Ns*Vt)* exp((V(j)+(I(j)*Rs))/(A*Ns*Vt))

I_(j) = I(j) g(j)/f(j)

I(j) = I_(j)

end

end

P = (Np*Iph-Io*(exp((V+I. *Rs)/(A*Ns*Vt))-1)-(V+I. *Rs)/Rp). *V, % Calculate power

Pmax_m = max(P)

error sama dengan Pmax_m-Pmax_e

end

6th. SIMULATION BENEFITS OF PHOTOVOLTAIC MODULE

The temp increase around the solar cell has a negative impact on the energy generation ability. When increasing the temperature (25ËšC to 100ËšC) I-V and P-V curves of PV component shifts for the left and voltage drop drastically although the current can be staying regular. This leads to net reduction in electricity output with increase in temperature. So , the ideal power also decreases with increase in heat.

The result of irradiance on the current-voltage (I-V) and power-voltage (P-V) characteristics can be seen in Figure. six and Determine. 7. The moment varying the irradiance (200W/m to 1000W/m) the current with the PV component increases dramatically and the volt quality also increase somewhat. So , the photo generated current is definitely directly proportionate to the irradiance. As the result on both current and voltage can be positive and the effect on the strength is also positive. Therefore , the greater irradiation within the solar cell, the more electric power is made.

7. CONCLUSION

The presented paper is the simulation of PHOTO VOLTAIC cell and module executed under MATLAB/M-file. In this paper seen which the PV module output variables can be various depending on their very own cell temp and diffusion. Also the simulation the desired info is matched with all the manufacturer’ data sheets. It truly is importance to compute and because the experimental maximum output power does not match with the computed one out of most case. So the version process and appropriate version method should be used for matching. is iteratively increased before the match condition. In the recommended model show ( = 0. 22Ω, and sama dengan 621. 7Ω) and the end result ( = 49. 933Ω) is great accuracy with the datasheet ( sama dengan x sama dengan 49. 941Ω). Therefore , this model can be used to examine all types of business PV modules and identify all important parameters below new circumstances of irradiance and temp and then, receive the I-V and P-V characteristics.

8. ACKNOWLEDGMENTS

Mcdougal would like to thank you my supervisor Dr . Nay Win Zaw, Head of the Department of Electronic Anatomist, and all of teachers from West Yangon Technological University who gave tips, fully guidance and helps to finish this conventional paper.