Design and Control of Modular Multilevel Converter for Voltage Sag Mitigation

Fazal Muhammad, Haroon Rasheed, Ihsan Ali, Roobaea Alroobaea and Ahmed Binmahfoudh
Additional contact information
Fazal Muhammad: Electrical Engineering Department, Bahria University Karachi Campus, Karachi 75260, Pakistan
Haroon Rasheed: Electrical Engineering Department, Bahria University Karachi Campus, Karachi 75260, Pakistan
Ihsan Ali: Department of Computer System and Technology, Faculty of Computer Science and Information Technology, Universiti Malaya, Kuala Lampur 50603, Malaysia
Roobaea Alroobaea: Department of Computer Science, College of Computers and Information Technology, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
Ahmed Binmahfoudh: Department of Computer Engineering, College of Computers and Information Technology, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia

Energies, 2022, vol. 15, issue 5, 1-26

Abstract: Voltage sag in a power system is an unavoidable power quality issue, and it is also an urgent concern of sensitive industrial users. To ensure the power quality demand and economical operation of the power system, voltage sag management has always drawn great attention from researchers around the world. The latest research that realizes the power quality conditioning has used dynamic voltage restorers (DVRs), static VAR compensator (SVCs), adaptive neuro-fuzzy inference systems (ANFISs), and fuzzy logic controllers based on DVR to mitigate voltage sag. These devices, methods, and control strategies that have been recently used for voltage sag mitigation have some limitations, including high cost, increased complexity, and lower performance. This article proposes a novel, efficient, reliable, and cost-effective voltage sag mitigation scheme based on a modular multilevel converter (MMC) that ensures effective power delivery at nominal power under transient voltage conditions. The proposed method, the MMC, compensates for the energy loss caused by voltage sags using its internal energy storage of the submodules, and ensures reliable power delivery to the load distribution system. Furthermore, control strategies are developed for the MMC to control DC voltage, AC voltage, active power, and circulating current. Detailed system mathematical models of controllers are developed in the dual synchronous reference frame (DSRF). Validation of the results of back-to-back MMC for dynamic load distribution system is analyzed which proves the effectiveness of the proposed scheme for voltage sag mitigation.

Keywords: dynamic load distribution; voltage sag mitigation (VSM); modular multilevel converter (MMC); circulating current suppression control (CCSC); dual synchronous reference frame (DSRF); proportional resonance controller (PRC); inner current controller (ICC) (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
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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