A Hybrid Nine-Level, 1- Grid Connected Multilevel Inverter With Low Switch Count and Innovative Voltage Regulation Techniques Across Auxiliary Capacitor

Chamarthi, Phanikumar; Roy, Jibanesh; Agarwal, Vivek

doi:10.1109/tpel.2018.2846628

Cited by 42 publications

(35 citation statements)

References 25 publications

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“…In other words, from the first statement if 1 Z o is stable, then under optimal grid circumstances, the system is stable. As seen from Figure 9, Z o is obtained by Z PLL in parallel with Z i which is given in Equation (58). So the poles of 1 Z o are same as the poles of 1 Z PLL plus the pole of 1 Z i .…”

Section: Derivation Of Stability Criteriamentioning

confidence: 99%

“…Table 5 shows the comparison of BMLI with other single‐phase grid‐connected nine‐level MLIs in terms of number of count of switches, levels and capacitors, current spike suppression, THD values of voltage and injected current, control technique, and capacitor balance. Therefore, topology reported in Sandeep and Yaragatti 31 and Phanikumar et al 58 has used more number of devices when compared with the proposed grid‐connected nine‐level BMLI and topology reported in Buticchi et al 59 has used equal number switches as in BMLI; however, in that topology, capacitor balance is missing. It is observed from Table 5 that BMLI gives better THD (0.55%) in injected current compared with all recent proposed configurations.…”

Section: Comparison Of the Proposed Bmli With Other Relevant Topologiesmentioning

confidence: 99%

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Evaluation of a grid‐connected reduced‐component boost multilevel inverter (BMLI) topology

Debela

Singh

Sood

2022

Circuit Theory & Apps

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In this paper, a reduced‐component switched‐capacitor boost multilevel inverter (SC‐BMLI) topology is proposed for off‐grid and on‐grid applications. Recently, switched‐capacitor‐based multilevel inverter (MLI) topologies have been employed to avoid the need for multiple isolated direct current (DC) sources when compared with traditional cascaded MLIs. To generate a nine‐level stepped‐up voltage across the load, the SC‐BMLI needs only eight power switches and two capacitors. To get the appropriate nine‐level switching pattern, phase disposition pulse width modulation (PD‐PWM) has been used. An extended 13‐level boost multilevel inverter (BMLI) is also discussed in this paper. The proposed topology is connected to the grid to control the grid current using synchronous reference frame‐based proportional–integral controller. A small‐signal modeling and analysis has been discussed in detail for the phase‐locked‐loop (PLL). Moreover, to prove the superior performance of the SC‐BMLI, comparative analysis with an existing single DC source MLI has also been performed. The feasibility of the 9‐level and 13‐level proposed topologies, with and without the grid‐connection, is evaluated by Matlab/Simulink simulation and verified by an experimental study using the OPAL‐RT 4510 real‐time platform. Further, prototype model of nine‐level BMLI has been developed in the laboratory using DSpace 1103 controller and results are compared with simulation.

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Section: Derivation Of Stability Criteriamentioning

confidence: 99%

Section: Comparison Of the Proposed Bmli With Other Relevant Topologiesmentioning

confidence: 99%

Evaluation of a grid‐connected reduced‐component boost multilevel inverter (BMLI) topology

Debela

Singh

Sood

2022

Circuit Theory & Apps

View full text Add to dashboard Cite

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“…Thus, the amount of charge pumped to the output by the capacitors can be calculated and used to determine the capacitances for a permissible voltage ripple. Considering the amplitude of the output current (Iout) with the output frequency (fout), the maximum discharging of each capacitor (∆𝑄 𝐶𝑖 ) is obtained by (1).…”

Section: B Capacitance Calculationsmentioning

confidence: 99%

“…owadays, renewable energy sources are gaining higher attention from industries for their clean nature and supportive government regulations. The integration of such low voltage DC sources to the existing AC power grids has necessitated the application of Multilevel Inverters (MLIs) [1]. Moreover, MLIs have become popular in many applications such as photovoltaic systems [2], uninterrupted power supply [3], solid state transformers [4], and electric vehicles [5].…”

Section: Introductionmentioning

confidence: 99%

Fault-Tolerant Operation Strategy for Reliability Improvement of a Switched-Capacitor Multilevel Inverter

Hassani

Azimi

Khodaparast

et al. 2022

IEEE Trans. Ind. Electron.

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the necessity of using several components in multilevel inverters jeopardizes the reliability of their operation. Hence, the aim of this research is to propose a novel single-phase fault-tolerant topology based on switched-capacitor concept to ensure robustness of the converter in the occurrence of a fault. The proposed single source converter steps up the input voltage seven times with a simple control strategy. Fault Tolerance of the converter is achieved by considering multiple fault cases and providing several redundant switching schemes concerning the type and location of failure. Each switching scheme is designed in a way to ensure the tolerability to both single and multiple open/short circuit failure. Also, self-voltage balancing of the capacitors, as well as the same amount of voltage levels and amplitude in the output is guaranteed. Experimental analysis is carried out, and the results confirm the viability of the proposed inverter under normal and post-fault operating modes.

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“…An asymmetrical CHB-MLI reported in [20] has the DC source asymmetry generated through a high-frequency DC-DC converter, and this will increase the overall component count, conduction losses and system complexity. A hybrid nine-level MLI [21] uses a PWM technique for nine-level voltage output. The reduced switch count is the main attraction of the topology, ten switches for nine levels.…”

Section: Introductionmentioning

confidence: 99%

Binary Hybrid Multilevel Inverter-Based Grid Integrated Solar Energy Conversion System With Damped SOGI Control

et al. 2020

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This paper presents a binary hybrid multilevel inverter (BHMLI) based grid-connected solar energy conversion system (SECS), controlled by damped second-order generalized integral (DSOGI). The BHMLI architect has a cascaded half-bridge array, which modifies the DC-link of the H-bridge of the voltage source inverter, and results in approximate reference waveform. It reduces the dV/dt of the H-bridge switches and improves output waveform quality. The DSOGI control damps the oscillations and overshoots and provides longer service period of low power switches at transient conditions. It is implemented in the multilevel inverter application for the first time in literature. The SECS is designed to inject active power to the grid, and also mitigates the harmonic and reactive power demands of the load. The cascading of 'n' half-bridges and one H-bridge generate (2 (nC1) − 1) output voltage levels. The maximum power extraction from solar photovoltaic (PV) array is achieved through incremental conductance (IC) algorithm based maximum point tracking (MPPT) operation of the DC-DC converter. An isolated single-input multipleoutput single-ended primary inductance converter (SIMO-SEPIC) realizes it. SECS with 15-level BHMLI is analyzed with extensive simulation as well as with a hardware prototype. Moreover, the shunt active filter functionality of the system at various load conditions are verified and maintained the grid power quality within the IEEE-519 standard throughout the operation. The laboratory developed setup is tested for 5 kW, 400 V, three-phase system, and the experimental analysis at steady-state and dynamic variations of load-side and insolation variations validate the theoretical claims. INDEX TERMS Multilevel inverter, SIMO-SEPIC, solar PV, power quality.

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A Hybrid Nine-Level, 1- Grid Connected Multilevel Inverter With Low Switch Count and Innovative Voltage Regulation Techniques Across Auxiliary Capacitor

Cited by 42 publications

References 25 publications

Evaluation of a grid‐connected reduced‐component boost multilevel inverter (BMLI) topology

Evaluation of a grid‐connected reduced‐component boost multilevel inverter (BMLI) topology

Fault-Tolerant Operation Strategy for Reliability Improvement of a Switched-Capacitor Multilevel Inverter

Binary Hybrid Multilevel Inverter-Based Grid Integrated Solar Energy Conversion System With Damped SOGI Control

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