ABSTRACT
Transformers that are directly connected to a wind turbine generator must be suitable for step-up operation; however, they are never energized from the low-voltage terminals, and therefore, the low voltage inrush currents are not considered in the design. Distributed photovoltaic grid transformers (DPV-GTs) generally fall under Class 1 as defined by IEEE Std. C57.12.00. The inverter converts direct current input from the photovoltaic array and provides alternating current voltage to the transformer, giving a steady and smooth transition, with no overvoltage caused by unloaded circuits. Solar transformers operate at a steady voltage, with the rated voltage controlled by inverters. A DPV-GT solar converter step-up transformer is uniquely designed to connect solar farms to the electricity grid at large-scale solar power installations. The DPV-GT features an innovative design that includes round coils, a cruciform, mitered core with heavy-duty clamping, and a proprietary pressure plate design, as well as a premium no-load tap changer.
