World's Largest Floating PV Power Plant Now Grid-connected
S. Himmelstein | May 22, 2017Chinese photovoltaic (PV) inverter manufacturer Sungrow announced that a 40 megawatt power project, which it calls the world’s largest floating PV power plant, has been grid-connected with its SG2500-MV central inverters in Huainan, China.
The facility is located in a flooded coal mining area with a water depth in the 4 to 10 meter (13 to 32 feet) range. The water is mineralized, rendering the resource useless.
Sungrow’s central inverter SG2500-MV integrates the inverter, transformer and switchgear as a turnkey station with lower transportation cost due to its 6-meter (20-foot) containerized design.
The manufacturer also supplied its SunBox PVS-8M/16M-W combiner box, customized for floating power plants, that enables their smooth operation in high humidity and salt spray environments.
It will be interesting to see how this holds up - with waves, mineralized water spray corrosion, differential wracking of array sections, controlling shock hazard to maintenance/cleaning workers. The last I heard on grounding theory is that the more grounding is dispersed over a potential lightning strike area of fairly uniform exposure geometry, the less likely for a strike, at least for the center of the exposure, but becoming more likely at the edges, so the floating PV may have this advantage.
At some point these floaters will be built as azimuth trackers, jacking up open sky efficiency by about 15 percent compared to fixed floaters.