Embedded Files
Assumption
Assumption
YPmax = - 0.45 W °C-1
5.1 Predicted AC Output Energy
5.1 Predicted AC Output Energy
Obtain result from simulation software
Exp: PVsyst | Photovoltaic software, Design and simulate photovoltaic systems
From the simulation software, Eout predict = 127.8 MWH per annum
5.2 Expected AC Output Energy, Eout expected
5.2 Expected AC Output Energy, Eout expected
5.2.1 Calculate ftemp
5.2.1 Calculate ftemp
ftemp Temperature derating factor during measurement (decimal)
Tmod Module temperature at specific time (°C)
Tmod avg Acceptance Ratio, in general, the solar panel project must achieve >=95% AR as minimum requirement (°C)
γPmax Temperature coefficient for Maximum Power/ Rated Power/ Peak Power/ Power at MPP (Pmax) (% °C-1 or % K-1)
From Step 4 Average Irradiance- Weighted Cell Temperature, Tmod avg = 55°C
5.2.2 Calculate Eout expected
5.2.2 Calculate Eout expected
Eout expected Expected AC energy generation (kWh)
PA stc PV array capacity (W)
PSHmeasured per annum Peak sun hour received in-plane of array/ In Plane PSH per day/month (h)
fmm Power de-rate factor due to mismatch (decimal)
fclean Power de-rate factor due to dirt (decimal)
fdegrad Power degradation factor due to LID and aging (decimal)
fshade Shading factor (decimal)
ηcable Efficiency of the cable (decimal)
ηinv Maximum efficiency of the inverter (decimal)
From Step 2 Peak Sun Hour, PSHmeasured per annum = 1666.6667 h
From Step 3 Acceptance Ratio ,
PA stc = 100 *1000 W
fmm = 1.0
fclean = 0.97
fdegrad = 0.98
fshade = 1.0
ηcable = 0.98
ηinv = 0.98
5.3 Measured AC Output Energy
5.3 Measured AC Output Energy
Eout measured Expected AC energy generation (kWh)
Pout, k Measured or recorded AC output power (W)
𝜏k Recording interval
T2, T1 Logging time
5.4 Calculate Energy Performance Index, EPI
5.4 Calculate Energy Performance Index, EPI
EPI = Eout measured / Eout expected
EPI = 133.33 / 131.6179 = 1.013
Reference
Reference
Design And Sizing of Grid-Connected Photovoltaic Power System - SEDA Malaysia- 4th Published 2023
Example 7.2
SEDA GCPV Tutorial Design - Nov 2024
3. System performance and evaluation - Question 3
Page updated
Google Sites
Report abuse