Performance Enhancement of FACTS Systems Using Multi-Level NPC-STATCOM With DQ-PI Control

Nerziou Madani; Bouanane Abdelkrim; Yahiaoui Merzoug; Addadi Zoubida; Raouti Driss; Tahtah Abdelkarim; Boukhalfa Mohamed; Nassour kamel

doi:10.5935/jetia.v12i61.4086

Authors

Nerziou Madani L.G.E Laboratory, Department of Electrical Engineering Faculty of Science and Technology, Dr. Moulay Taher University of SAIDA, Algeria.
Bouanane Abdelkrim L.G.E Laboratory, Department of Electrical Engineering Faculty of Science and Technology, Dr. Moulay Taher University of SAIDA, Algeria
Yahiaoui Merzoug L.G.E Laboratory, Department of Electrical Engineering Faculty of Science and Technology, Dr. Moulay Taher University of SAIDA, Algeria.
Addadi Zoubida L.G.E Laboratory, Department of Electrical Engineering Faculty of Science and Technology, Dr. Moulay Taher University of SAIDA, Algeria
Raouti Driss L.G.E Laboratory, Department of Electrical Engineering Faculty of Science and Technology, Dr. Moulay Taher University of SAIDA, Algeria
Tahtah Abdelkarim L.G.E Laboratory, Department of Electrical Engineering Faculty of Science and Technology, Dr. Moulay Taher University of SAIDA, Algeria
Boukhalfa Mohamed ZianeAchour University of Djelfa, 17000, Djelfa, Algeria
Nassour kamel Electrotechnical Engineering Laboratory University of Sidi Bel Abbes Djillali liabes Sidi Bel Abbes, Algeria

DOI:

https://doi.org/10.5935/jetia.v12i61.4086

Abstract

Flexible AC Transmission Systems (FACTS) are essential for improving stability, reliability, and efficiency in modern power networks. This paper examines the use of multi-level Neutral Point Clamped (NPC) converters in STATCOM devices to enhance voltage regulation and power quality under diverse load conditions. A comparative study of 3-, 5-, and 7-level NPC converters is presented, combined with a PI-based dq-frame control strategy for reactive power compensation. MATLAB/Simulink simulations under various scenarios—including voltage dips and inductive/capacitive load changes—demonstrate the effectiveness of the proposed approach. Results show that higher-level NPC converters significantly reduce harmonic distortion (down to 0.93% with a seven-level NPC), improve voltage stability at the point of common coupling, and ensure reliable operation in both inductive and capacitive modes. The findings highlight the potential of multi-level NPC-based STATCOMs as a practical and efficient solution for enhancing power transmission performance and supporting modern grid requirements.