Performance analysis of reduced switch ladder type multilevel inverter using various modulation control strategies

Vishwajith, N.; Rao, S. Nagaraja; Sachin, S.

doi:10.1088/1742-6596/1706/1/012092

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…A low THD% output ladder can be produced by using a suitable switching device [6].The switched ladder topology has the adaptability to various voltage ratios and the placement of DC sources with fewer power switching components [7]. The reduction in switched ladder-based MLI achieves enhanced output level helping in a smooth transition and diminished%THD of the AC output [8].…”

Section: Introductionmentioning

confidence: 99%

Performance Comparison of 7-level Multi-Level Inverter Topologies using FPGA

Nithya,

Anitha,

Arulaalan

2023

ijmst

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This paper compares the Multi-Level Inverter namely Switched Ladder and H-Bridge Topologies for the performance parameters. The topologies considered are fed with the switch patterns from the non-carrier angle manipulated formula. The switching angle algorithm identifies on which particular angle the signal has to be generated. It is identified based on four algorithm namely half height method, equal phase method,This paper concentrates on the 7-level MLI AC output using the synthesizable VHDL code and implemented using the FPGA in real-time. For verification in simulation, the cross-compiling is attained using the System Generator tool.

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Section: Introductionmentioning

confidence: 99%

Performance Comparison of 7-level Multi-Level Inverter Topologies using FPGA

Nithya,

Anitha,

Arulaalan

2023

ijmst

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“…These studies are done to reduce switch count with increased voltage levels, improved transient response, lower number of capacitor balance circuits and level of modularity. The interested readers are referred to read [12,[32][33][34][35][36][37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Quick Search Algorithm-Based Direct Model Predictive Control of Grid-Connected 289-Level Multilevel Inverter

et al. 2023

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Multilevel inverters, known for their low switching loss and suitability for medium- to high-power applications, often create a heavy computational overhead for the controller. This paper addresses the aforementioned limitation by presenting a novel approach to Direct Model Predictive Control (DMPC) for a grid-tied 289-level ladder multilevel inverter (LMLI). The primary objective is to achieve perfect inverter current control without enumeration. The proposed control method provides a single best solution without complete exploration of the search space. This generalized method can be applied to any multilevel inverter (MLI), enabling them to be used in the grid-tied mode without the computational burden due to a large number of switching states. The DMPC of LMLI with 289-level output and corresponding 289 control inputs, utilizes a discrete model to predict the future state of the state variable. In order to alleviate the enumeration burden, virtual sectors on a linear scale are introduced, and a general formula is provided to identify the single best state among the 289 states, reducing the time required to find the best optimal state per sampling period. Moreover, the proposed control scheme is independent of objective evaluation.

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“…In MLIs, isolated multiple DC or virtual DC-links are obtained by using transformers or capacitors with the contribution of various switching components. Producing high voltage levels with a low number of isolated DC power supplies and fewer switching devices is the main challenge [8][9][10]. The suitable approach to limit the DC power supplies is to utilize the capacitors.…”

Section: Introductionmentioning

confidence: 99%

An Enhanced Z-Source Switched MLI Capacitor for Integrated Micro-Grid with Advanced Switching Pattern Scheme

Bm¹,

Rao

Kumar³

et al. 2022

Eng. Technol. Appl. Sci. Res.

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In this paper, the Enhanced Z-Source Switched Capacitor Multi-Level Inverter (EZSC-MLI) is presented, which can generate a greater number of levels and magnitude in output. The proposed MLI has greater recognition due to its low harmonic profile, fewer switching components, compact size, low switch stress, isolated DC supply, high efficiency, and low cost. A high voltage boost factor is achieved by using the Z-Source. The Switched Capacitor module is used for charging all the capacitors to equal voltage magnitude based on a self-balanced scheme. The proposed topology for grid integration requires dual control loops, a primary voltage control loop, and a secondary current control loop. The performance of the proposed 7-level topology for grid integrated systems is verified with multi-carrier advanced modulation schemes and by simulations carried out in Matlab/Simulink.

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Performance analysis of reduced switch ladder type multilevel inverter using various modulation control strategies

Cited by 6 publications

References 11 publications

Performance Comparison of 7-level Multi-Level Inverter Topologies using FPGA

Performance Comparison of 7-level Multi-Level Inverter Topologies using FPGA

Quick Search Algorithm-Based Direct Model Predictive Control of Grid-Connected 289-Level Multilevel Inverter

An Enhanced Z-Source Switched MLI Capacitor for Integrated Micro-Grid with Advanced Switching Pattern Scheme

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