Largest Rooftop Solar Power Plant of UAE

Largest Rooftop Solar Power Plant of UAE

This is the largest rooftop solar power plant in the whole UAE. Its capacity is 3.8MW_P in total. This Solar Power Plant is installed on two separate rooftops of the same shopping mall. There is also more than one point of Connection for this Power Plant. This Solar Power Plant is biggest of all the rooftop solar power plants ever installed in the whole the United Arab Emirates (UAE). Most of the solar PV plants in UAE are on-grid solar systems like this largest rooftop solar power plant.

	About	Details
1	Installed DC Capacity	3.801MWdc
2	Installed AC Capacity	3.6MWAC
3	Number of Solar PV Modules	11700
4	Number of Solar PV Inverters	36
5	Solar PV Modules Manufacturer	Panasonic
6	Solar PV Inverter Manufacturer	ABB
7	Number of Solar PV modules in each String	13

Components of Solar PV Plant

Here we will discuss all the individual components used in this Largest Solar Power Plant of UAE. This Biggest rooftop solar power plant was designed by Panasonic. This Largest Rooftop Solar Power plant was installed in 9 months. Now we will discuss the individual components in detail.

As we already mentioned this biggest rooftop solar power plant is installed in two portions, and it also has more than 1 point of connection. Here in this article, we will discuss only 1 part of this biggest solar power plant. We will also discuss the 2^nd portion of this Power Plant but in a separate article.

1^st Portion of Biggest Rooftop Solar Power Plant

In this article, we are discussing the components of 1^st a portion of this largest rooftop solar power plant.

Solar PV Module:

There are a total of 6292 solar PV modules installed in this portion of the largest solar power plant. These solar PV modules are monocrystalline 325W_P and manufactured by Panasonic. This solar PV module is 1053mm wide and 1590mm in long. This solar PV module unlike the other solar PV modules has points for water drainage in its metal frame. The efficiency of this solar PV module is 19.7%.

Further details of Solar PV Module are given in the below table:

Sr. No.	About	Details
1	Rated Power (Pmax)	325W
2	Voltage (Vmp)	57.6V
3	Current (Imp)	5.65A
4	Open Circuit Voltage (VOC)	69.6V
5	Short Circuit Current (ISC)	6.03A
6	Maximum Series Fuse	15A
7	Fire Class	C
8	Application Class	A
9	Power Tolerance	0 to 10%

Standard Test Conditions (STC) are the same for all the solar PV modules which are 1000 w/m² irradiance, cell temperature 25^oC and air pass 1.5.

Solar PV inverter:

In first portion of this largest solar power plant, there are 19 solar PV inverters manufactured by ABB. Each solar PV inverter is 100KVA incapacity. These inverters are installed near the solar PV modules on the rooftop. These solar PV inverters generate 3 phase AC output. These inverters are on-grid solar PV inverters. These solar PV inverters have 24 DC string inputs.

Further details of Solar PV inverters are given below table:

Sr. No.	About	Details
1	DC Maximum Input Voltage	100VDC
2	DC Maximum Input Current for each MPPT	36A
3	Maximum Short Circuit Current (ISC) for each MPPT	50A
4	DC MPPT range	480 to 850 VDC
5	Startup DC Voltage	420VDC
6	Nominal Output Voltage AC	320 to 480 VAC (3 Phase)
7	Nominal Operating Frequency	50/60 HZ
8	Rated Output Power AC	100 KVA
9	Maximum Output Power AC	100KVA
10	Maximum Output Current AC	145A
11	Power Factor	> 0.995, 0…1 inductive/capacitive with maximum Smax
12	Range of Operating Temperature	-25 to +60oC
13	Enclosure	IP66
14	Communication	RS485, Ethernet, WLAN
15	Number of MPPT	4

These solar PV inverters are the latest models of ABB solar inverters. These solar inverters are equipped with all the necessary tools and technology.

There are 6 MPPTs (Maximum Power Point Tracking) in these solar PV inverters. Each MPPT have 4 number of DC inputs. There are built-in fuse plugs for both positive and negative wires of all 24 inputs.

DC String Cables:

6mm² DC string cable is used for this biggest rooftop solar power plant. MC4 connectors are used to connect these string cables to the solar PV modules and solar PV inverters. This string cable is made of copper and has two protective layers of plastic. This string cable is rated as an outdoor DC cable.

AC Output Cables:

70mm² 4 core XPLE AC cable is used as an output cable from inverters to the AC combiner box for this largest rooftop solar power plant. This AC cable is UV rated Ac cable and suitable for outdoor installations. From the AC combiner box to the meter cabinet and meter cabinet to the point of connection 150mm² 4 core AC cable is used.

AC Combiner Box:

For this portion of the largest rooftop solar power plant, there are two AC combiner boxes. 1^st AC combiner box has 10 inputs of 70mm² 4 core AC cables and 5 outputs of 150mm² 4 core AC cables. 2^nd AC combiner box has 4 outputs of 150mm² 4 core AC cable and 9 inputs of 70mm² 4 core AC cables.

This AC combiner box is equipped with a motorized main circuit breaker to disconnect the supply of the whole combiner box at once. And there are individual circuit breakers for each inverter. There is also interface protection relay available for these AC combiner boxes.

Breakers and Relays:

All the breakers and relays used in this project are manufactured by ABB. The main circuit breaker is 4 pole motorized contactor manufactured by ABB. Individual inverter circuit breakers are also 4 poles but these circuit breakers are manual.

Mounting Structure:

For this solar power plant mounting structure is comprised of only Calzip clamps because the roof is a calzip type metal roof. There are only 4 clamps under each solar PV module.

Cable Trays:

Cable tray portion will be discussed in detail in 2^nd article with 2^nd part of this largest solar Power Plant.

Weather Monitoring System:

The weather monitoring system is discussed in detail in the second portion of this Power Plant. Please click here to access the 2^nd portion of this biggest rooftop solar power plant.

Online Monitoring System:

The online monitoring system is also discussed in the second portion of this power plant. To access the second portion of this power plant please click here.