Recent Advancement and Comparative Turnouts of 1Ø Grid Tied Non-Isolated Inverters Topologies

Renewable Energy (RE) is environmentally friendly, abundant, economically feasible and has become a prime interest as well as a potential substitute to conventional fossil fuels. One of the fastest growing RE source is Photo-Voltaic (PV) has gained a lot of momentum these days which can be hooked to the grid distribution network. Power electronics interface plays a vital role in power generation. Converter topologies have quite a substantial impact on the efficiency of a generation system. This research examines the current advancements in non-isolated Grid-connected PV (GPV) inverter systems along with their historical overview. Several transformerless inverters have been presented using various ways such as decoupling the DC from the AC side and/or clamping the common mode or using common ground configurations. In addition, various trailblazing inverter topologies are elaborated in a systematic manner with the foreseeable major hurdles in developing a smart and efficient system. Furthermore, different performance metrics are appropriately analyzed and reported in a table. This paper aims to comprehensively review and classify various transformerless inverters with detailed analytical comparisons in order to offer a clear understanding on the development of optimal transformerless inverters for the rising generation GPV systems.