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- Title
Model Reference Adaptive Multivariable Control of a Four-Leg Converter.
- Authors
Marin-Hurtado, A. J.; Escobar-Mejia, A.; Giraldo, E.
- Abstract
This paper proposes a Model Reference Adaptive Control (MRAC) scheme for a Three-Phase Four-Leg Voltage Source Converter (4-LVSC). The Three-Phase Four-Leg Voltage Source Converter (4-LVSC) has been proposed to integrate renewable energy into the grid and compensate for the unbalances current in the system. The 4-LVSC control requires generating a balanced three-phase voltage with a given frequency and amplitude at the grid to compensate for the unbalances in the system. To this end, the proposed approach uses a multivariable reference model for reference tracking. In addition, the controller parameters are tuned by using a multivariable identification stage. The MRAC is applied over a multivariable 4-LVSC described in state space and is evaluated in two scenarios: simulation and Hardware-In-the-Loop structure. In addition, the proposed control approach is evaluated under internal and external disturbances. An additional comparison analysis is performed by considering a controller with a one-step-ahead controller (OSAC) based on the same identification stage. Results show that the MRAC control presents low settling time, steady-state error, and overshoots when it controls the grid's 4-LVSC converter with unbalanced loads.
- Subjects
ADAPTIVE control systems; VOLTAGE-frequency converters; IDEAL sources (Electric circuits); HARDWARE-in-the-loop simulation; RENEWABLE energy sources
- Publication
Engineering Letters, 2022, Vol 30, Issue 3, p1157
- ISSN
1816-093X
- Publication type
Article