DSP Based Implementation of SHE-PWM For Cross-Switched Multilevel Inverter

Meraj, Sheikh Tanzim; Ahmed, Arsalan; Law, Kah Haw; Arif, Adeel; Masaoud, Ammar

doi:10.1109/cspa.2019.8695981

Cited by 14 publications

(7 citation statements)

References 7 publications

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“…However, in this case presence of 5th harmonic component can be observed having a normalized value of 2.4/69.2 = 0.035%. Selective harmonic elimination (SHE) modulation technique can be used to completely remove the existence of the remaining harmonics (5th, 11th and 13th) from the output voltage and current [25]. It must be addressed that the estimation and eradication of harmonics is not a purpose of this manuscript.…”

Section: Resultsmentioning

confidence: 99%

Single phase 21 level hybrid multilevel inverter with reduced power components employing low frequency modulation technique

Meraj

Yahaya

Hasan³

et al. 2020

IJPEDS

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This paper introduces a new hybrid topology of multilevel inverter capable of generating 21-level output voltage. The proposed topology is built using the combination of cross-switched bridge and a conventional full H-bridge. Compared to the conventional topologies and other hybrid topologies, the newly introduced multilevel inverter has the ability to maximize the number of voltage levels utilizing lower number of DC voltage sources, integrated bipolar transistor (IGBT) switches and gate drivers. A low frequency modulation technique is used to generate the ideal multilevel output voltage and gate pulses. Furthermore, the proposed topology is validated by building a hardware prototype and obtaining relevant experimental results. The acquired simulated and experimental results indicate the proper functioning of the proposed hybrid topology along with the compatibility of the applied modulation technique.

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Section: Resultsmentioning

confidence: 99%

Single phase 21 level hybrid multilevel inverter with reduced power components employing low frequency modulation technique

Meraj

Yahaya

Hasan³

et al. 2020

IJPEDS

Self Cite

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show abstract

“…One of the major concerns is the analytical solution for determining the optimum switching angles [3], [4]. In literature, numerous techniques have been proposed such as; Newton-Raphson iterative approach [5]- [7], resultant theory-based approach [8], current reference-based approach [9], Walsh functions [10], gradient method [11], and meta heuristic optimization techniques [12]. In the Newton-Raphson (NR) approach, initial values need to be set.…”

Section: A Related Workmentioning

confidence: 99%

“…However, there is no established formula to select the initial values making the whole process highly unreliable and complicated. In addition, the optimization performance of NR is very sluggish, and it cannot produce wide range of solutions specially for lower-level MLIs [5]. Walsh functions for the SHEPWM was proposed in [10] to determine the optimum switching angles.…”

Section: A Related Workmentioning

confidence: 99%

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Opposition-Based Quantum Bat Algorithm to Eliminate Lower-Order Harmonics of Multilevel Inverters

et al. 2021

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Selective harmonic elimination (SHE) technique is used in power inverters to eliminate specific lower-order harmonics by determining optimum switching angles that are used to generate Pulse Width Modulation (PWM) signals for multilevel inverter (MLI) switches. Various optimization algorithms have been developed to determine the optimum switching angles. However, these techniques are still trapped in local optima. This study proposes an opposition-based quantum bat algorithm (OQBA) to determine these optimum switching angles. This algorithm is formulated by utilizing habitual characteristics of bats. It has advanced learning ability that can effectively remove lower-order harmonics from the output voltage of MLI. It can eventually increase the quality of the output voltage along with the efficiency of the MLI. The performance of the algorithm is evaluated with three different case studies involving 7, 11, and 17-level three-phase MLIs. The results are verified using both simulation and experimental studies. The results showed substantial improvement and superiority compared to other available algorithms both in terms of the harmonics reduction of harmonics and finding the correct solutions.

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“…In this work, an asymmetric MLI with a low switch count was developed, which eliminated the requirement for bidirectional switches, capacitors, and more diodes in the design of the MLI. Due to the absence of bidirectional switches, the proposed topology had no infuence on the reverse recovery times of the diode and voltage-balancing efect of input capacitors, and it makes use of a reduced gate control circuit to accomplish this [29][30][31][32][33]. Te suggested inverter employs a SHEPWM control approach to suppress the lower-order harmonics [34,35].…”

Section: Introductionmentioning

confidence: 99%

Design of an Optimized Asymmetric Multilevel Inverter with Reduced Components Using Newton‐Raphson Method and Particle Swarm Optimization

Kumar¹,

Sireesha

Ganesh

et al. 2023

Mathematical Problems in Engineering

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Multilevel inverters have great scope in current developments of grid-connected solar PV systems. Two-level inverters are the simplest kind of multilevel inverter available (MLI). As the number of output levels is raised, the total harmonic distortion decreases. In classic MLI topologies, more electronic components are utilized to get higher-level outputs, which raise the cost, complexity, and volume of typical MLI installations. By reducing the design components, the cost of the system will be reduced. Furthermore, the two- and three-level inverters produce constant dv/dt output, which increases the stress on the power switches. This research proposes an asymmetric MLI topology that is suitable for PV applications and utilizes less number of DC sources and switches. The proposed inverter is controlled by selective harmonic elimination-based pulse width modulation (SHEPWM) to eliminate the lower-order dominant harmonics. The nonlinear equations produced by the SHEPWM are solved for the switching angles of the proposed inverter using the Newton-Raphson (NR) method and particle swarm optimization (PSO) method for various modulation indexes. The performance of the proposed inverter is analyzed based on the total harmonic distortion (THD) of the output for different operating levels of the inverter by comparing similar topologies in the literature. The THD obtained by the NR method is 7.3% and by using PSO is 4.23% at 0.9 modulation index.

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DSP Based Implementation of SHE-PWM For Cross-Switched Multilevel Inverter

Cited by 14 publications

References 7 publications

Single phase 21 level hybrid multilevel inverter with reduced power components employing low frequency modulation technique

Single phase 21 level hybrid multilevel inverter with reduced power components employing low frequency modulation technique

Opposition-Based Quantum Bat Algorithm to Eliminate Lower-Order Harmonics of Multilevel Inverters

Design of an Optimized Asymmetric Multilevel Inverter with Reduced Components Using Newton‐Raphson Method and Particle Swarm Optimization

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