Comparison of harmonics and THD suppression with three and 5 level multilevel inverter-cascaded H-bridge

Rajesh, B.; Manjesh,

doi:10.1109/iccpct.2016.7530116

Cited by 23 publications

(7 citation statements)

References 3 publications

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“…The traditional CHBMI [21][22][23] topology is fascinating owing to its unique features. Thus, high power levels, high output voltage and reliability, simple and easy control schemes, and equal DC source discharge can be realized; moreover, its simple modular structure can be easily replicated to generate numerous output voltage levels.…”

Section: Cascaded H-bridge Multilevel Invertermentioning

confidence: 99%

Advancing battery energy storage system: State‐of‐health aware state‐of‐charge balancing in multilevel inverters for electric transportation

Batool,

Majeed,

Kim

2024

Energy Storage

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This research presents an innovative methodology for enhancing battery energy storage systems for electrically powered transportation, utilizing a distinctive cascaded H‐bridge multilevel inverter design, termed P‐CHBMI. Central to this work is the development of a state‐of‐health aware state‐of‐charge (SoH‐aware‐SoC) balancing technique, which leverages an advanced algorithm integrated with a Proportional‐Integral (PI) controller technique to efficiently balance battery cells according to their state‐of health (SoH). This technique significantly improves operational efficiency and extends the lifespan of battery systems by intelligently optimizing cell discharge processes. Moreover, this research work delivers a wide range of simulations for the generation of a streamlined control algorithms for the development of the symmetric and asymmetric configuration of the P‐CHBMI. Similarly, recommended topology is proficient of equal voltage discharge across battery cells, which is an exclusive property of the conventional cascaded H‐bridge topology. The study includes extensive MATLAB/Simulink simulations to validate the superiority of the P‐CHBMI and the SoH‐aware‐SoC balancing method over conventional systems, highlighting substantial enhancements in switch count efficiency, operational flexibility, and battery durability. Further, the practical applicability of the proposed topology is evidenced through a hardware implementation of a symmetric 5‐level inverter. This study plays a significant role in the development of the inverter technology particularly in off‐grid scenarios such as electric vehicle and aircrafts, keeping the battery efficiency and reliability as a most important factor.

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Section: Cascaded H-bridge Multilevel Invertermentioning

confidence: 99%

Advancing battery energy storage system: State‐of‐health aware state‐of‐charge balancing in multilevel inverters for electric transportation

Batool,

Majeed,

Kim

2024

Energy Storage

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“…flying capacitor MLI (FCMLI) [14], and cascaded Hbridge MLI (CHB-MLI) [15]. Among these MLIs, the CHB-MLI has acquired special attention in most topologies because of the modular structure and flexible to generate any number of output voltage levels [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

MC-SPWM and MC-THIPWM Methods for Symmetric and Asymmetric Design of CHB-MLI: A Study

Patel¹,

Sood²

2022

J. Engg. Res. & Sci.

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Cascaded H-bridge multilevel inverters (CHB-MLI) are employed in a variety of medium/high power applications. These inverters are known to inject unwanted harmonics into the grid, which negatively affects the grid and connected loads. CHB-MLI topology can reduce many of these harmonics by producing multiple output voltage levels and improves the fundamental component using a suitable modulation technique. However, the CHB-MLI topology configuration requires multiple isolated input sources which must be balanced either with the modulation technique or with an additional method. This paper analyzes multi-carrier pulse width modulation (MC-PWM) techniques for CHB-MLIs. In this study, two basic configurations of CHB-MLI symmetrical and asymmetrical are reviewed, followed by their mathematical analysis. Also, this paper analyses multicarrier based sinusoidal pulse width modulation (MC-SPWM) and multi-carrier based third-harmonic injected pulse width modulation (MC-THIPWM) techniques with phase-shifted (PS) and level-shifted (LS) carrier arrangements for the CHB-MLI. Moreover, a simulation study has been conducted using MATLAB Simulink to analyze the performance of MC-PWM techniques for the symmetrical and asymmetrical type CHB-MLIs. The 7-level and 9-level CHB-MLIs were evaluated for the stated MC-PWM techniques in terms of harmonics and fundamental components. In addition, discharging current of all input sources was checked to verify the ability of all MC-PWM techniques to balance all input sources.

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“…In addition to circuit solutions related to the implementation of a high number of output voltage levels of inverters [25,26], there are algorithmic methods to improve the sinusoidality of the output voltage. One such method is the implementation of the overmodulation [27] and waveform optimum [28] mode.…”

Section: Introductionmentioning

confidence: 99%

A method for calculating the parameters of the sine filter of the frequency converter, taking into account the criterion of starting current limitation and pulse-width modulation frequency

Nerubatskyi

Plakhtii

Hordiienko

et al. 2021

EEJET

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An analysis of the method for ensuring the sinusoidality of the output voltage in power generation systems with self-commutated voltage inverters under the requirements of the international standard IEEE-519 is presented. In a number of programs, especially low-power generation systems, a low-cost solution is needed to provide the sinusoidal waveform of the output voltage with the total harmonic distortion of 5 %. This solution is to use two-level voltage inverters with an output sine LC filter. However, the feature of the sine filter with the frequency converter is that the PWM frequency affects the spectrum of higher harmonics of the output voltage. In addition, there is the starting current of the filter capacitor, which can disable the power switches of the voltage inverter. The developed method for calculating the values of the LC filter with the two-level voltage inverter in the PWM mode is presented meeting the requirements of the international standard IEEE-519, taking into account the modulation frequency and limitation of the starting current of the filter capacitor. To confirm the required quality of the output voltage of the two-level voltage inverter with the sine filter, an appropriate simulation model was created in the Matlab/Simulink computer simulation environment. The oscillograms and harmonic analysis of the input and output voltages of the sine filter, which showed the total harmonic distortion of 1.88 %, are presented. A physical prototype of the investigated system was created on the basis of a 5.5 kW OVEN PChV203-5K5-V frequency converter (Ukraine). Using the SIGLENT SDS1104X-E oscilloscope (China), the real waveform and the results of the harmonic analysis of the sine filter output voltage, confirming the implementation of the necessary sinusoidality criteria, were obtained

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Comparison of harmonics and THD suppression with three and 5 level multilevel inverter-cascaded H-bridge

Cited by 23 publications

References 3 publications

Advancing battery energy storage system: State‐of‐health aware state‐of‐charge balancing in multilevel inverters for electric transportation

Advancing battery energy storage system: State‐of‐health aware state‐of‐charge balancing in multilevel inverters for electric transportation

MC-SPWM and MC-THIPWM Methods for Symmetric and Asymmetric Design of CHB-MLI: A Study

A method for calculating the parameters of the sine filter of the frequency converter, taking into account the criterion of starting current limitation and pulse-width modulation frequency

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