Open AccessFuzzy logic controller for partial shaded photovoltaic array fed modular multilevel converter
Author(s) -
Guruambeth Ramya,
Ramabadran Ramaprabha
Publication year - 2016
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2015.0737
Subject(s) - control theory (sociology) , overshoot (microwave communication) , controller (irrigation) , photovoltaic system , modular design , open loop controller , settling time , computer science , fuzzy logic , pid controller , transient (computer programming) , grid , control engineering , engineering , step response , temperature control , mathematics , control (management) , electrical engineering , artificial intelligence , agronomy , biology , operating system , telecommunications , geometry , closed loop
This study presents the control and modelling of modular multilevel converter (MMC) with grid‐connected photovoltaic system. Synchronisation is an important issue in grid‐connected system. Even though conventional proportional–integral (PI) controller used for synchronisation provides adequate performance, it yields poor transient response of the system because of poor tuning of controller gain values. In this study, the fuzzy tuned PI controller is designed and implemented to overcome this problem. The fuzzy logic controller refrains the controller gains based on the operating point of the system. The improved performance parameters such as faster transient response, tracking of the reference current with low overshoot and short settling time with system parameter changes under partial shading of the proposed controller are validated. The results are compared with conventional PI controlled grid‐connected MMC with various PI gains. The developed controller algorithm is implemented through TMS320F28335 digital signal processor.