For this scenario, generally, the capacity of a grid-tied unit is 1–2.5 MW. The voltage on the transformer high-voltage side is between 10 kV to 35 kV. Communication is implemented by connection to the central monitoring room over the optical fiber ring network.
In most cases, large-sized PV power stations require a 35 kV/110 kV (220 kV) booster station. The AC side mostly uses the delta connection, and the N cable can be spared. The power grid is relatively clean with low harmonic content, therefore the PLC communication mode can be used.
For technical data sheets, user manuals and other usefull information please access the folowing link: http://solar.huawei.com/eu/services (Download Center).
