Fuzzy Sliding-Mode Control with Adaptive Exponential Reaching Law for Inverter in Photovoltaic Microgrid Provisionally Accepted
- 1Laiwu Power Supply Company of State GridShandong Electric Power Corporation, China
- 2TomoWave Suzhou Medical Imaging Co.,Ltd, China
- 3Huaiyin Institute of Technology, China
Photovoltaic inverters are widely utilized in microgrid systems working as the key equipment for converting solar energy into usable electricity. This paper presents a fuzzy sliding mode control (FSMC) method for the photovoltaic inverter in a microgrid. The inverter module uses voltage control to achieve stable AC output voltage. Meanwhile, to deal with the system uncertainty and nonlinear in the photovoltaic inverter, a fuzzy controller was designed to realize real-time adaptation of the gains of the constant term and the reaching term in the sliding mode control law, which serves as a compensating controller for traditional sliding mode control. The gains of the exponential reaching law can be adjusted according to the system state instead of fixed gains, which can effectively reduce the chattering phenomenon and improve the robustness of the photovoltaic microgrid. Finally, the Lyapunov stability theory was used to ensure the stability of the entire control system, achieving a high-performance independent power supply for loads in a microgrid. Simulation results show that the designed control system is more robust to load disturbances, and has superior dynamic performance.
Keywords: Microgrid, Photovoltaic inverter, sliding mode control, Fuzzy controller, Adaptive Exponential Reaching Law, Robustness control
Received: 13 Apr 2024;
Accepted: 06 May 2024.
Copyright: © 2024 Pei, Zhao, Jia, Wang, Liu, Cheng and Yang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: Dr. Yan Yang, Huaiyin Institute of Technology, Huaiyin, China