Modified multilevel inverter topology with reduced switch count and a novel PWM control scheme

Balakrishnan, Dhivya; Indiradevi, K.

doi:10.1109/iccci.2014.6921845

Cited by 4 publications

(4 citation statements)

References 28 publications

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“…In previous studies, the configuration of Figure 2(a) has been applied in the three-level inverter circuit shown in Figure 1 [11], [12], [13] and [21]. This configuration suffers from a high voltage drop that produces high conduction losses and voltage imbalance.…”

Section: Bidirectional Switching Modulesmentioning

confidence: 99%

“…Newton-Raphson method works efficiently with reasonable initial estimations ( , , and ) and this can be effectively satisfied considering the constraints described in equation (9). Nonlinear equations (5-7) and their derivatives have been rearranged in the forms given by equations (10)(11)(12), and Newton Raphson's next approximation…”

Section: Determination Of Switching Tablesmentioning

confidence: 99%

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Selected Harmonics Elimination for Modified Multilevel Inverter with Bi-Directional Switches

Ibrahim¹,

Mohamad²

2019

IJCA

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Multilevel inverters are receiving continuous attention in terms of circuit topology, control methods and applications. This paper presents a modified topology that applies a bidirectional switching module to reduce the number of switches of the 3-level inverter. Common emitter back-toback IGBTs have been used to assemble the bidirectional conducting module. The modified inverter has been controlled using the selected harmonics eliminations technique with 3, 4 and 5 primary switching angles. The control algorithm has been implemented using a basic fixed point, low-cost microcontroller. Results including output voltage and current waveforms, spectrum, harmonic distortion, and converter efficiency data are presented. Simulation and experimental results verified the ability of the inverter to provide a wide range of output voltage and eliminate the targeted harmonics. General TermsAlgorithm development, embedded system, power electronic.

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Section: Bidirectional Switching Modulesmentioning

confidence: 99%

Section: Determination Of Switching Tablesmentioning

confidence: 99%

Selected Harmonics Elimination for Modified Multilevel Inverter with Bi-Directional Switches

Ibrahim¹,

Mohamad²

2019

IJCA

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“…Although passive methods are used to solve the problem, leakage rates rise and the space required increases [8]. Multilevel inverters (MLI) provide an alternate solution by employing an altering procedure to generate a sine wave signal in a set of power stages [9]. Additional benefits of MLI include lower electromagnetic interference, lower current distortion, higherquality voltage and current waveforms, and superior quality voltage waveforms [10].…”

Section: Introductionmentioning

confidence: 99%

A Novel Multilevel Inverter for Renewable Energy Applications with Optimized Controller and Reduced Switches

B. Thejasvi

2024

jes

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Multilevel converters have the capability of handling high power as well as deliver output with reduced harmonics. So they can be implemented with renewable energy sources to produce multilayer output with symmetric cascade arrangement with reduced switches. Here the control technique is developed in such a way to reduce the harmonics in the grid integrated PV system. The paper proposes optimized Fractional Order Proportional Integral Derivative (FOPID) controller for a seven level reduced switch multilevel inverter. The War Strategy Optimization Algorithm (WSOA) which utilizes optimizing the strategic movements of armed forces (assault and defend) towards the final optimal value is used to optimize the FOPID controller. This WSOA algorithm is used to adjust the gain parameters of the FOPID controller there by improving the system performance. The characteristics of grid connected PV system are regulated by implementing this suggested technique. The projected approach is incorporated using MATLAB / Simulink and the performances are evaluated and compared with the conventional techniques like GA – PID and WSOA – PID controllers.

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“…However, the recent trend optimization in PV systems has been shown to be the implementation of PCS using multi-level inverters [15]- [17]. Among the various MLI topologies, the cascaded H-Bridge (CHB) topology has been preferred in PV systems due to its simplicity and ease of integration with PV systems [18], [19]. In CHB topologies, several H-Bridge cells are connected in series to provide an enhanced output from a low input voltage.…”

Section: Introductionmentioning

confidence: 99%

A Flyback-Assisted Single-Sourced Photovoltaic Power Conditioning System Using an Asymmetric Cascaded Multilevel Inverter

Manoharan¹,

Ahmed²,

Park³

2016

Journal of Power Electronics

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This paper proposes a power conditioning system (PCS) for distributed photovoltaic (PV) applications using an asymmetric cascaded multilevel inverter with a single PV source. One of the main disadvantages of the cascaded multilevel inverters in PV systems is the requirement of multiple isolated DC sources. Using multiple PV strings leads to a compromise in either the voltage balance of individual H-bridge cells or the maximum power point tracking (MPPT) operation due to localized variations in atmospheric conditions. The proposed PCS uses a single PV source with a flyback DC-DC converter to facilitate a reduction of the required DC sources and to maintain the voltage balance during MPPT operation. The flyback converter is used to provide input for low-voltage H-bridge cells which processes only 20% of the total power. This helps to minimize the losses occurring in the proposed PCS. Furthermore, transient analyses and controller design for the proposed PCS in both the stand-alone mode and the grid-connection mode are presented. The feasibility of the proposed PCS and its control scheme have been tested using a 1kW hardware prototype and the obtained results are presented.

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Modified multilevel inverter topology with reduced switch count and a novel PWM control scheme

Cited by 4 publications

References 28 publications

Selected Harmonics Elimination for Modified Multilevel Inverter with Bi-Directional Switches

Selected Harmonics Elimination for Modified Multilevel Inverter with Bi-Directional Switches

A Novel Multilevel Inverter for Renewable Energy Applications with Optimized Controller and Reduced Switches

A Flyback-Assisted Single-Sourced Photovoltaic Power Conditioning System Using an Asymmetric Cascaded Multilevel Inverter

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