Single-phase distributed generation system based on asymmetrical cascaded multilevel inverter

Design of a robust current controller for grid‐connected photovoltaic systems based on cascaded multilevel inverter

“…One of the main advantages in the use of an LMI-based problem is that it can be solved without further complications by a great variety of solvers as the LMI MATLAB® Toolbox [37]. The solution for the problem posed in (15) leads to the determination of an optimal upper bound for ∥ H yw ∥ ∞ (16), and to the definition of the also optimal H ∞ state feedback controller gains (17).…”

“…For this reason, the use of such filters demands the adoption of peak damping strategies also as presented in [13,14], being passive or active damping methods. In the light of that, the case study covered by this work regards a grid-connected PV generation system in which the grid-interactive inverter is based on the asymmetrical cascaded multilevel topology [15,16]. Multilevel inverters can offer an output voltage composed by more voltage levels when compared to conventional three-level PMW inverters.…”

“…In this sense, the robustness of the control system against parametric uncertainties needs to be addressed, given that its overall stability can be highly affected by such uncertainties. In [16], a distributed generation system was proposed based on the same inverter topology, but the sensitivity against parameter uncertainties have been not taken into account. Nonetheless, there are works that deals with parametric uncertainties for this kind of applications, such as [17,18].…”

Investigation of multilevel multifunctional grid connected inverter topologies and control strategies used in photovoltaic systems

“…This topology permits the switching of the higher power cells at fundamental frequency, reducing the switching losses of the inverter and thus improving efficiency. However, this advantage is also its important weakness since the power is not evenly distributed among the inverter cells, mitigating the input current low order harmonics elimination effect of the multipulse rectifier system of the conventional CHB [39,42]. 19-level ACHB-MFGCI configuration is shown in Fig.…”

Controle e análise de conversores multiníveis conectados em redes de distribuição para aplicação em painéis fotovoltaicos e armazenadores de energia

“…Por fim, a validação da proposta é feita através dos resultados de simulações e experimentais que mostram a capacidade do sistema de geração em transferir potência constante para a rede de distribuição e manter a corrente quase sem distorções em fase com a tensão. ENSLIN, 1996;SONG et al, 2001;BOR-REN;YI-LANG, 2002), a em cascata simétrica (FANG ZHENG et al, 1996;MCKEEVER;ADAMS, 1998;YIQIAO;NWANKPA, 1999;CHUL-WOO et al, 2002;LI et al, 2003;GENG;YONGDONG;XIAOJIE, 2004;MASSOUD;FINNEY;WILLIAMS, 2004), e a em cascata assimétrica (PATIL et al, 1999;LEE;RON HUI;HENRY SHU-HUNG, 2002;LOPEZ et al, 2003;HONGFA;XIANZHONG;QINGCHUN, 2005;ORTUZAR et al, 2006;PIMENTEL;POMILIO, 2008;PIMENTEL;MARTINEZ;POMILIO, 2009;PIMENTEL, 2011 (FANG ZHENG et al, 1996;HAMMOND, 1997;JOOS;XIAOGANG;BOON-TECK, 1998;SCHIBLI;TUNG;RUFER, 1998;HABETLER, 1999;RODRIGUEZ et al, 2002). A seção seguinte apresenta as motivaçõ...…”