A Proportional Resonant Controller Scheme for Suppressing Resonance in Grid tied Multilevel Inverter

Energies

SubranshuSekhar Dash¹  Sridhar Ramasamy¹  Chellammal Nallaperumal²  Hemakesavulu Oruganti² 

[1] Technology, Chennai 603203, India;;Department of Electrical and Electronics Engineering, SRM Institute of Science &

关键词: photovoltaic;    two degrees of freedom;    proportional resonant-derivative;    feedback current controller;    maximum power point tracking;    multilevel inverter;   

DOI  :  10.3390/en11051024

来源: DOAJ

【 摘 要 】

Photovoltaic (PV) resources are connected to power grid through voltage source inverters. The quality of power output from PV inverter should be in grid compliance of IEEE standard. In this regard, the deployment of appropriate low pass filters such as inductor (L), capacitor (C) or inductor capacitor inductor (LCL) is critical as they aid in minimizing the harmonics being injected into the grid. LCL filters are well entrenched but they bring in stability issue due to resonance and therefore a damping controller with suitable control logic is needed. In this work, to suppress resonance, a Proportional Resonant-Derivative (PR-D) controller has been designed, proposed, and compared with existing counterparts, i.e., two-degree of freedom controller (2DOF) and feedback current controller. The results exhibits that PR-D controller admits meliorate resonance damping and constancy when compared with the two other schemes. The whole system has been simulated in MATLAB/Simulink environment and a prototype has also been made to ensure the performance.

【 授权许可】

Unknown