IEEE Access (Jan 2022)

Switching Pattern Improvement for One-Cycle Zero-Integral-Error Current Controller

  • S. Orts-Grau,
  • P. Balaguer-Herrero,
  • J. Carlos Alfonso-Gil,
  • Camilo I. Martinez-Marquez,
  • G. Martinez-Navarro,
  • Francisco J. Gimeno-Sales,
  • S. Segui-Chilet

DOI
https://doi.org/10.1109/ACCESS.2021.3137758
Journal volume & issue
Vol. 10
pp. 158 – 167

Abstract

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The one-cycle current control is a non-linear technique based on the cycle-by-cycle calculation of the ON time of the power converter switches. Its application is not common in tracking fast-changing reference currents, due to the necessity of fast and accurate measurements, and high-speed computing. In a previous study, a one-cycle digital current controller based on the minimization of the integral error of the current was developed and applied to the control of a three-phase shunt active power filter. In the present work, the one-cycle controller has been improved by proposing a new switching pattern. It allows an easy implementation that reduces the critical computational cost and avoids the main drawbacks of the previous implementation. The controller has been applied in a three-leg four-wire shunt active power filter, including a stability analysis considering the proposed switching pattern. Simulated and experimental results are presented to validate the proposed controller.

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