ABSTRACT
Inverter technology has been slow to advance as related to the capacity of handling power, because it is an electronic technology. The maximum power rating is at the moment 500 KVA. The energy, or power, provided by utilities to industry, residences, and businesses comes from the infinite electrical grid and is commonly referred to as alternating current. Some renewable energy power generation systems, such as solar, produce direct current (DC). Inverters began being used in the late nineteenth century as electromechanical devices in the form of rotary converters or motor-generator sets. Solar inverters differ from standard inverters used in variable speed drives only in their auxiliary controls and monitoring capabilities. Inverter circuits typically will introduce some amount of DC offset voltage also called DC bias. Grid-tie inverters that are available on the market today use a number of different technologies. The inverters may use the newer high-frequency transformers, conventional low-frequency transformers, or go without a transformer.
