The company claimed that the three-phase transformerless inverters with graded power outputs of 500, 1000, 1500, and 2000kW and high efficiency level enable plant operators to realize a high yield when feeding into the medium-voltage grid, as in the case of ground-mounted PV systems and systems mounted on large roofs.
The new Sinvert PVS central inverters are also available in PV containers, complete with medium-voltage components. With the master/slave technique it is possible not only to increase plant availability, but also to attain a longer plant service life, the company added.
The efficiency level, being higher than that of a stand-alone system, the inverters can be switched in and out as required, depending on solar radiation. The efficiency of the solar plant can thus be optimized, particularly in the case of partial-load operation: the plant starts up even at low solar radiation, and reaches efficiency levels even in the low performance range.
As the inverter sub-unit with the few operating hours is always controlled as the master, this enables the operating time to be evenly distributed between the inverters, which will prolong the service life of the plant.
The new Sinvert PVS inverter series can be integrated into Scada systems through standardized communication interfaces. A pixel-graphics display with touch screen enables visualization of the performance data.
The new devices comply with the medium-voltage guidelines of the German Association of Energy and Water Industries with all requirements including FRT (Fault Ride Through) and active power control.
