| Title |
The Stable Adaptive Converter Control Method of Photovoltaic Power Systems using Lyapunov Redesign Approach |
| Authors |
조현철(Cho, Hyun-Cheol) ; 박지호(Park, Ji-Ho) ; 김동완(Kim, Dong-Wan) |
| DOI |
https://doi.org/10.5370/KIEEP.2012.61.4.161 |
| Keywords |
Adaptive control ; Converter control method ; Lyapunov redesign ; Photovoltaic power system |
| Abstract |
Energy conversion systems such as power inverters and converters are basically significant in establishing photovoltaic power systems to enhance power effectiveness. This paper proposes a new converter control method by using the Lyapunov redesign approach. We construct the proposed control mechanism linearly composed of nominal control and auxiliary control laws. The former is generally designed through a well-known power electronic technology and the latter is implemented to compensate real-time control error due to uncertain natures of converter systems in practice. For realizing adaptive control capability in the proposed control mechanism, a control parameter vector is estimated by utilizing a steepest descent based optimization method. We carry out numerical simulation with Matlab(c) software to demonstrate reliability of the proposed converter control system and conduct a comparative study to prove its superiority by comparing with a generic converter control methodology. |