An Improvement of Holistic Control Tuning for Reducing Energy Consumption in Seamless Transitions for a BESS Grid-Connected Converter

Alberto Arellanes, Ciro Nuñez (), Nancy Visairo and Andres A. Valdez-Fernandez
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Alberto Arellanes: Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí, San Luis Potosi 78290, Mexico
Ciro Nuñez: Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí, San Luis Potosi 78290, Mexico
Nancy Visairo: Facultad de Ingeniería, Universidad Autónoma de San Luis Potosí, San Luis Potosi 78290, Mexico
Andres A. Valdez-Fernandez: Facultad de Ciencias, Universidad Autónoma de San Luis Potosí, San Luis Potosi 78295, Mexico

Energies, 2022, vol. 15, issue 21, 1-23

Abstract: This paper presents an improvement of the tuning process of the holistic control published by the authors in previous research to achieve a seamless transition among three operation mode changes and load transients. The proposed tuning approach reveals an improvement in the energy consumption of the Battery Energy Storage System (BESS) during all operation mode transients compared to the holistic control. For this aim, the system addressed is a BESS with the capability to ride through three operation modes of interest: the grid-connected mode as an inverter, the grid-connected mode as a rectifier, and the islanded operation mode. The LCL filter design by using the Butterworth polynomial approach is presented in more detail, and its smooth inherent transient response is preserved when the tuning of the controller gains is carried out by using the same polynomial approach but now including the integral action within the Butterworth polynomial. To reveal the reduction in energy consumption, the closed-loop transfer functions of each mode were used to compare the previous holistic control and this new one named by the authors as the “improved holistic control”. The closed-loop system fulfills the frequency and voltage thresholds of the IEEE 1547-2018 standard seamlessly. The simulation runs were conducted on the PSCAD/EMTDC to evaluate the seamless transition among the operation mode changes and load steps. The experimental results in a 617 W, 120 V L − L three-phase converter prototype are included to demonstrate the validity of the improved holistic control.

Keywords: seamless transition; BESS; grid-connected mode; islanded mode; LCL-filter; holistic control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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