Multifunctional Multilevel Inverter for Grid Connected Solar PV

Abstract

With the increasing demand for electricity loss reduction, efficiency enhancement and making grid newlineenvironment friendly are the necessities in today s era, Electricity must be generated, dispersed, and distributed newlinein real-time. It s required to manage demand and provide in real-time along with ensuring stability and power newlinequality to consumers. Smart distribution is distributing energy in a smarter way. Distributed energy resources newline(DERs) are small power resources, like solar photovoltaic, cogeneration systems, wind turbines, micro turbines, newlinebackup generators, and energy storage devices which will be aggregated to satisfy the regular demands. It newlineprovides energy where ever it is needed. It also provides the less costly and fast option as compared to the newlinemassive structured power plants. Renewable energy resources (RES) like wind and photovoltaic (PV) are newlinesubstantially used for power generation as an alternative to conventional ones. This research presents newlinemultifunctional operation capability of three level cascade H bridge inverter for grid connected solar newlinephotovoltaic application. The solar panel and inverter are modelled for changing atmospheric conditions and newlinenonlinear loads with three different control of reference generation (pq,dq,cpt) and its performance is simulated newlinein the MATLAB environment using SIMULINK. The performance of inverter is evaluated for harmonics newlineelimination, power factor correction apart from active and reactive power support to grid and nonlinear load. newlinePerformance of three level H bridge inverter is evaluated for both PV mode and STATCOM mode using three newlinecontrol techniques for distribution grid. The experimental validation is carried out in real time on a developed newlineprototype in the laboratory for different modes. Experimental results demonstrates that the performance of the newlinepresented system is satisfactory for active power injection by maximum power extraction, power factor newlinecorrection reactive power compensation harmonics elimination, LVRT support and Islanding detection. The newlineproposed system