A Novel Direct Decoupled Power Control for Modified Packed U-Cell Topology under Partial Shading /

Abstract

With breakthroughs in renewable energy, scientists are working to create an integrated unit that stands out in terms of dependability and intermittency. Photo-voltaic systems are the most reliable, environmentally beneficial, and costeffective source. In addition, Multi-level inverter topology offers a low number of assembly components, a cost-benefit, and increased efficiency. Among these, modified packed U-Cell offers the biggest benefits. This research focuses on the design of decoupled direct quadratic control for Asymmetric Multilevel Inverter architecture, i.e. Modified packed U-Cell, as well as the effects of partial shading on Photo-voltaic system applications by25-75%. It also compared coupled sine control and decoupled direct quadratic control for balancing reactive power in the presence of shade and output power fluctuation. Level shifted pulse with modulation is used as the modulation method, and it provides five leveled output and control algorithms implemented for Dc-link capacitor voltage balancing. Two Photo-voltaic modules from the same MPPT and DC-DC converters are connected to separate floating capacitors, balanced with a decoupled direct quadratic controller and a coupled sine controller, and the results are compared. The results indicate that decoupled direct quadratic control gives superior control in terms of Photo-voltaic partial shading as well as system reactive power control. Therefore, the decoupled direct quadratic controller is more efficient and reduces the need for active filters and compensators, while also promoting resilience, leading to less assembly, reduced THD, and improved efficiency.