This report summarizes the design of a 1 megawatt grid-connected solar photovoltaic system in Hyderabad, India. The location was selected due to its high annual solar irradiation of 5.32 kWh/m2/day. Canadian Solar CS6P-260PX polycrystalline solar modules and two 500 kW ABB PVS800 central inverters were selected as the primary components. System simulations showed the system would produce 894 kW of maximum power and have an 80.1% performance ratio. Eight combiner boxes were also selected to connect the 22 module strings in parallel to each inverter.

1. 2016
[Type the authorname]
08/01/2016
Steinbeis Solar PV training 1MW
grid Connected System Design
Report

2. 1. Location and Climate data
Location: For the set up of solar power plant we have selected Hyderabad as the area with
latitude and longitude of 17.37° N and 78.48 °E and the altitude is 503m and the average
annual radiation is 5.32 kWh/m2
/day
Figure 1 Aerial view of site selected
Climate: The irradiation received by Hyderabad is suited for the installation of solar power
plant. It receives an annual irradiation of around 5.32 kWh/m2
/day and the average annual
temperature is 26.9 degrees Celsius. The annual radiation map for the India is as shown in
the following figure.

3. Figure 2 Radiation map of India
Figure 3 Monthly radiation of Hyderabad(Source-Meteonorm)
Figure 4 Monthly temperature of Hyderabad (Source-Meteonorm)
Figure 5 Monthly sunshine duration of Hyderabad(Source-Meteonorm)
3. Selection of primary components
The decision making process continues with the selection of modules and inverters.
Modules:
The module we selected is a 60 cell poly crystalline module of Canadian solar with CS6P-
260PX as the model number.
Canadian solar is a leading tier 1 module manufacturing company with successful business
subsidiaries in 18 countries on 6 continents. Canadian Solar’s total project pipeline is now 9
GW, including an increase in the late-stage project pipeline to 2.4 GW. With two state-of-the-
art manufacturing facilities in Ontario, Canadian Solar employs over 8,500 workers

4. worldwide. This translates into more than 12 GW of panel shipments, or over 30 million PV
modules, in the past 14 years.
Canadian solar CS6P-260PX poly crystalline module (source-Canadian solar web)
Specifications:
Model NO. CS6P-260PX
PMPP 260 W
VOC 37.5V
ISC 9.12A
VMPP 30.4V
IMPP 8.56A
The module dimensions are 1638x982x40 and it weighs around 20 kilograms. It has been
designed to operate in a temperature range of -40 to 85 degree Celsius.
This module also comes with a 10 year warranty on manufacturing defects and 25 year
warranty on power output performance.
Inverter:
The inverter we selected is of 500kw central inverter of ABB manufacturer. The number of
inverters we are using is two with PVS800-57-0500KWA as model number.
ABB's PVS800 central inverters are aimed at system integrators and end users who require
high performance solar inverters for utility-scale PV power plants and are looking for
maximum return on investment over the lifetime of the plant. The inverters are made of
proven components with a long track record of performance excellence in demanding
applications and harsh environments.

5. ABB Solar inverter
Specifications:
Efficiency 98.4
Operating temperature -15 TO +50 C
Dimensions 2630*708*2130 mm
Weight 1800 KG
MPPT range 450 -825 V
Max. Ac power 500KW
No. Of ac inputs 4
4. Simulation of the System
The following data shows the basic configuration of the system:
Installed Capacity: 1 MW
Modules: 3850
No. of inverters: 2
Modules in one string: 22
Maximum operating power: 894 kW
No. Of strings in parallel: 175
No of string combiner box: 8
No of inputs in a string combiner box: 22

6. Simulation Inputs
Figure 6 Screenshots of the plant sizing from PV Syst

7. The simulation results show us the total energy produced over the year by the installed
system. Also, it clearly indicates the performance ratio (PR) as 80.1%.
This means that 80.1 % of available radiation is finally converted to electric power by the
installed system.
Simulation Results
Screenshot of the simulation results
The following diagram shows the detailed loss analysis of our system as derived from the
PV Syst system analysis.
Figure 7 System loss over the whole year: PV Syst screenshot

8. 5. Selection of Secondary Components
Combiner boxes:
As per our plant we require combiner boxes which can connect multiple strings and provide
single output to the inverter. In our case, we have to combine 22 strings to get a single
output to one of the inverters. Therefore, we need 8 such DC Combiner boxes throughout
the entire field.
No. Of inputs 22
Input voltage and current 560V &188.3A
Operating temperature 0-60 C
No of combiner box used 8