Multilevel Converters: Control and Modulation Techniques for Their Operation and Industrial Applications

Leon, Jose I.; Vázquez, Sergio; Franquelo, Leopoldo G.

doi:10.1109/jproc.2017.2726583

Cited by 368 publications

(176 citation statements)

References 116 publications

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“…Compared with the two-level topology, it has been demonstrated that three-level NPC converters show a superior performance in terms such as high output voltage quality, low current harmonics as well as higher power ratings. This fact established the NPC converter as a reference in the academia and industry applications [3,4].…”

Section: Introductionmentioning

confidence: 96%

A High-Gain Observer-Based Adaptive Super-Twisting Algorithm for DC-Link Voltage Control of NPC Converters

et al. 2020

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Acting as an interface between the grid and many energy systems, the active front-end (AFE) has been widely used in a large variety of industrial applications. In this paper, in order to ensure the fast dynamic performance and good disturbance rejection ability of the AFE, a high-gain observer (HGO) plus adaptive super-twisting algorithm (STA) for the three-level neutral-point-clamped (NPC) converter is proposed. Comparing with the conventional PI control strategy, the proposed controller implements the adaptive STA in the voltage regulator to provide a faster transient response. The gains of the adaptive STA keep varying according to the rules being reduced in steady state but increasing in transient conditions. Therefore, the chattering phenomenon is mitigated and the dynamic response is guaranteed. Additionally, to undermine the impact of external disturbances on the dc-link voltage, a high-efficiency HGO is designed in the voltage regulation loop to reject it. Experimental results based on a three-level NPC prototype are given and compared with the conventional PI method to validate the fast dynamic performance and high disturbance rejection ability of the proposed approach.

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Section: Introductionmentioning

confidence: 96%

A High-Gain Observer-Based Adaptive Super-Twisting Algorithm for DC-Link Voltage Control of NPC Converters

et al. 2020

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“…Voltage source inverters (VSI) are an industry standard for power conversion, and are extensively applied in different fields such as renewable energy integration, motor drives, or energy storage [1][2][3][4]. The general trend for these applications is the search for new and more ambitious control methods, and the use of new devices that allow higher switching frequencies with reduced power losses.…”

Section: Introductionmentioning

confidence: 99%

Efficient FPSoC Prototyping of FCS-MPC for Three-Phase Voltage Source Inverters

et al. 2020

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This work describes an efficient implementation in terms of computation time and resource usage in a Field-Programmable System-On-Chip (FPSoC) of a Finite Control Set Model Predictive Control (FCS-MPC) algorithm. As an example, the FCS-MPC implementation is used for the current reference tracking of a two-level three-phase power converter. The proposed solution is an enabler for using both complex control algorithms and digital controllers for high switching frequency semiconductor technologies. An original HW/SW (hardware and software) system architecture for an FPSoC is designed to take advantage of a modern operating system, while removing time uncertainty in real-time software tasks, and exploiting dedicated FPGA fabric for the most complex computations. In addition, two different architectures for the FPGA-implemented functionality are proposed and compared in order to study the area-speed trade-off. Experimental results show the feasibility of the proposed implementation, which achieves a speed hundreds of times faster than the conventional Digital Signal Processor (DSP)-based control platform.Keywords: field-programmable gate array (FPGA); field-programmable system-on-chip (FPSoC); finite control set (FCS); model predictive control (MPC); voltage source inverter (VSI)

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“…Multilevel inverter topologies play an important role for medium‐voltage, medium‐, and high‐power level power system applications, such as static compensators (STATCOM), active shunt filter, and renewable energy integration to grid . It has some promising features such as lower harmonic distortion, lesser dv/dt voltage stresses on power semiconductor devices, requires lower voltage rating devices, high power handling capability, lower switching losses, higher conversion efficiency, producing smaller common mode voltage, and lesser electromagnetic interference (EMI) . Multilevel inverter topologies are categorized as cascaded H‐bridge (CHB), neutral point clamped (NPC), and flying‐capacitor (FC) inverter.…”

Section: Introductionmentioning

confidence: 99%

“…1-6 It has some promising features such as lower harmonic distortion, lesser dv/dt voltage stresses on power semiconductor devices, requires lower voltage rating devices, high power handling capability, lower switching losses, higher conversion efficiency, producing smaller common mode voltage, and lesser electromagnetic interference (EMI). 7,8 Multilevel inverter topologies are categorized as cascaded H-bridge (CHB), neutral point clamped (NPC), and flying-capacitor (FC) inverter. Among these three popular multilevel inverter structures, CHB inverter is fascinating because of its higher level of voltage and power handling capability, redundancy in switching, simple modular structure, and lesser requirement of power devices to generate a specific number of output voltage levels.…”

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confidence: 99%

An improved SHM‐PWM scheme for three‐phase seven‐level CHB inverter to improve power quality by fulfilling CIGRE WG 36‐05 and EN 50160 and sharing equal power between the H‐bridge cells

Kundu

Banerjee

2019

Int Trans Electr Energ Syst

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Summary This paper presents an improved selective harmonic minimization (SHM)‐pulse width modulation (PWM) scheme using three‐phase seven‐level cascaded H‐bridge (CHB) inverter suitable for medium‐voltage distribution systems by achieving high‐quality voltage waveform with least number of switching instances (ie, each power semiconductor devices switched once in a quarter period). Here, each isolated DC voltage sources have been taken as variable and unequal for the CHB inverter. The efficacy of the proposed SHM‐PWM scheme over selective harmonic elimination (SHE)‐PWM scheme and existing SHM‐PWM scheme has been verified through a comparative inverter performance analysis with equal number of switching instances. Both simulation and experimental results prove that the proposed SHM‐PWM scheme ensures equal percentage of power‐sharing between the H‐bridge cells, achieves desired fundamental voltage component, minimizes each individual odd nontriplen harmonics, and limits %total harmonic distortion (THD) up to 25th‐order harmonics such that, it satisfies the power quality standards CIGRE WG 36‐05 and EN 50160 for the entire modulation index range. It is also seen that the proposed scheme requires least no of switching (three) than other reported SHE‐/SHM‐PWM schemes to meet the aforesaid power quality standards. It also results lower inverter losses and improves efficiency compared with conventional schemes. Finally, the scheme is applied to a closed‐loop control of induction motor driven by back‐to‐back PWM‐controlled converter.

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Multilevel Converters: Control and Modulation Techniques for Their Operation and Industrial Applications

Cited by 368 publications

References 116 publications

A High-Gain Observer-Based Adaptive Super-Twisting Algorithm for DC-Link Voltage Control of NPC Converters

A High-Gain Observer-Based Adaptive Super-Twisting Algorithm for DC-Link Voltage Control of NPC Converters

Efficient FPSoC Prototyping of FCS-MPC for Three-Phase Voltage Source Inverters

An improved SHM‐PWM scheme for three‐phase seven‐level CHB inverter to improve power quality by fulfilling CIGRE WG 36‐05 and EN 50160 and sharing equal power between the H‐bridge cells

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