A closer look at Al Dhafra, Abu Dhabi’s 2 GW desert wonder
It rarely rains in the desert of Abu Dhabi, but the heavens opened when pv magazine visited in January to see the 2 GW Al Dhafra solar park. Local engineers tell us it is the world’s largest single-site solar plant, producing enough energy to power 200,000 homes.
Some of the 3.8 million panels it contains are visible from the visitor center, but there is only so much the human eye can take in.
Luckily, the rain clears up and we get the chance to walk among the panels. The scale of the plant means we must be driven out to the middle of the park. It takes several minutes.
Stepping outside the van, we can hear the noise of the trackers – the panels are mounted on a total of 30,000 trackers.
The trackers have several different modes, including auto-tracking (follows the sun’s path with astronomical algorithm along with backtracking), wind mode (adapts to windy conditions), rain mode (stops at certain angles if it rains), cleaning mode (sets the panels to a specific angle for manual cleaning. The park has 2,000 cleaning robots), and horizontal mode (for maintenance).
Image: pv magazine
Monitoring such a monumental operation is a challenge. It has 20 weather monitoring stations and a million signal data points. Al Dhafra’s engineers rely on 8,000 string inverters which guarantee a high level of uptime. These are made by Sungrow.
The plant has three different module specs, using cells from TrinaSolar, Suntech and Jinko Solar. Trina’s TSM-DEG19C.20 modules come with an efficiency of 21.20%; Suntech’s STPXXXS-C72/Pmh+ modules are 21.30% efficiency; and Jinko Solar’s N-type 72HL4-BDV modules offer an efficiency of 21.87%. All come with 30-year power guarantees.
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