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Refined Model Predictive Control of Back-to-Back 3L-NPC converter interfacing a PMSG based WECS with Grid for Blocking High Jumps in Voltages

Author(s):

Aswani Kumar Eedara*, Chandra Sekhar Koritala and Srinivasa Rao Rayapudi  

Abstract:


This paper presents a refined model predictive control (RMPC) strategy for controlling a back-to-back three-level (3L) neutral-point-clamped (NPC) converter interfacing a PMSG based WECS with the electric grid. In addition to the control targets like maximum power extraction, reactive power management, capacitors voltage mismatch minimization, The MPC controllers on PMSG-side and network-side prevent high jumps in line and pole voltages on PMSG-side and network-side converters. To prevent high jumps in line and pole voltages, the suitable subset of switching states (SSs) are predetermined for each SS. In each control cycle, the RMPC algorithm fetches an appropriate candidate set of SSs based on present SS. The algorithm identifies optimal switching state from the appropriate candidate set of SSs. The performance of RMPC is verified by simulation test results. The inductance parameter mismatch effect on RMPC performance is also verified.

Keywords:

Model predictive control, PMSG, Wind Energy, High jumps in voltages, Back-to-back, three-level, Neutral-point-clamped, Parameter mismatch

Affiliation:

Electrical & Electronics Engineering Dept., Jawaharlal Nehru Technological University, Kakinada, Electrical & Electronics Engineering Dept., RVR & JC College of Engg, Guntur, Electrical & Electronics Engineering Dept., Jawaharlal Nehru Technological University, Kakinada



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