A Fibonacci Series based Nearest Level Modulation Scheme for Multilevel Inverters

Kumar, A. Rakesh; Padmanaban, Sanjeevikumar; Subudhi, Partha Sarathi; Blaabjerg, Frede; Dhanamjayulu, C.

doi:10.1109/compel49091.2020.9265866

Cited by 2 publications

(5 citation statements)

References 24 publications

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“…The Nearest Level Modulation (NLM) switching technique has gained tremendous attention due to its advantages. The major advantage is that the switching angles can be calculated using a simple mathematical equation [3]. Besides that, it also offers a lower Total Harmonic Distortion (THD) value since the produced waveform follows the sinusoidal nature of AC waveforms [1].…”

Section: Nearest Level Modulationmentioning

confidence: 99%

“…Figure 5 above shows that this NLM switching technique helps generate a stepped waveform that synchronizes with the reference sine waveform [2]. At every switching angle, the sine wave will cut the rising edge of the stepped waveform exactly at half its magnitude [1] - [3]. The nearest voltage level is selected by comparing the reference sine waveform with the output voltage level [4].…”

Section: Figure 5 Nlm Switching Technique [2]mentioning

confidence: 99%

“…The nearest voltage level is selected by comparing the reference sine waveform with the output voltage level [4]. The switching angle for NLM can be calculated using Equation ( 5), while the value of THD can be determined using Equation (6) [1] - [3],…”

Section: Figure 5 Nlm Switching Technique [2]mentioning

confidence: 99%

“…These switching techniques play a crucial part in the inverter since they are directly related to the overall efficiency of the entire system. LSF offers many advantages over HSF, such as lower switching losses [3], reduced switching stress, lower cooling requirements, lower operating cost, better efficiency, and many more [1]. Hence, it is more favorable to operate the MLIs under LSF switching techniques such as Nearest Level Modulation (NLM), Selective Harmonics Elimination (SHE), and Space Vector Control (SVC) [1] - [3].…”

Section: Introductionmentioning

confidence: 99%

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Performance Analysis of Cross-Connected Sources Multilevel Inverter (CCSMLI) based on NLM and SHE Switching Schemes

Ayob

Jasri²

2022

Elektrika

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Power inverter is an important device in nowadays technologies since the usage of renewable energy sources had been increased rapidly throughout the world. The main focus of research in power inverter field today is to produce a high efficiency power inverter to maximize the energy obtained from the renewable energy sources i.e. to reduce the energy losses. In DC to AC power conversion, the selection of appropriate switching scheme to be implemented is very crucial. In this paper, two different switching schemes, namely Nearest Level Modulation (NLM) and Selective Harmonics Elimination (SHE) are implemented on the Cross-Connected Sources Multilevel Inverter (CCSMLI) circuit with symmetrical configuration. The switching schemes are implemented on two different levels of CCSMLI circuit (11-level and 13-level) with two types of loads (R load and RL load). The performance of the circuit in terms of voltage Total Harmonics Distortion (THD) is being compared for different levels, load types and switching schemes. Simulation has been carried out using MATLAB/Simulink R2021a software package. The simulation results indicate a significant reduction in voltage THD when 13-level CCSMLI circuit, RL load and NLM switching scheme are implemented.

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Section: Nearest Level Modulationmentioning

confidence: 99%

Section: Figure 5 Nlm Switching Technique [2]mentioning

confidence: 99%

Section: Figure 5 Nlm Switching Technique [2]mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Performance Analysis of Cross-Connected Sources Multilevel Inverter (CCSMLI) based on NLM and SHE Switching Schemes

Ayob

Jasri²

2022

Elektrika

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“…There is a symbiotic relationship between modulation strategy and converter topology, and a good modulation strategy plays an important role in the output power quality of converters. The most commonly used modulation strategies are nearest level modulation (NLM) [3] and carrier phase-shifted sine pulse width modulation (CPS-SPWM) [4]. To date, many researchers have studied the output characteristics of inverters by improving or following other NLM-based theories as a benchmark.…”

Section: Introductionmentioning

confidence: 99%

A novel jittered‐carrier phase‐shifted sine pulse width modulation for cascaded H‐bridge converter

Luo,

Lin,

Zhang

et al. 2024

The Journal of Engineering

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Carrier phase‐shifted sine pulse width modulation is a common modulation strategy for medium‐ and low‐voltage cascaded H‐bridges (CHB). This paper proposes a novel jittered‐carrier phase‐shifted sine pulse width modulation (JCPS‐SPWM) to reduce the total harmonic distortion (THD) of the converter. It makes the carrier jitter regularly while the total switching times remain unchanged, which reduces the THD of the bridge arm voltage and current by moving the low‐order output harmonics of the bridge arm voltage and current to filterable high‐order harmonics. Since the total number of switching times remains unchanged, this modulation strategy will not cause any increase in switching loss. A seven‐level CHB simulation model and an experimental prototype are built to verify the effectiveness of the approach. The results show that harmonic content can be reduced by 47.5% compared with the traditional method, thus verifying the effectiveness of the JCPS‐SPWM.

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A Fibonacci Series based Nearest Level Modulation Scheme for Multilevel Inverters

Cited by 2 publications

References 24 publications

Performance Analysis of Cross-Connected Sources Multilevel Inverter (CCSMLI) based on NLM and SHE Switching Schemes

Performance Analysis of Cross-Connected Sources Multilevel Inverter (CCSMLI) based on NLM and SHE Switching Schemes

A novel jittered‐carrier phase‐shifted sine pulse width modulation for cascaded H‐bridge converter

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