A Timing Correction Algorithm-Based Extended SVM for Three-Level Neutral-Point-Clamped MLI in Over Modulation Zone

Bharatiraja, C.; Jeevananthan, S.; Munda, Josiah L.

doi:10.1109/jestpe.2017.2723518

Cited by 43 publications

(27 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After the arrival of T-type-NPC-MLI, I-type-NPC-MLI were evaded due to their long current commutation paths, higher stray inductance, and high conduction loss. The T-type 3L-NPC is being explored more to progress the better system efficiency [25][26][27][28][29][30][31][32]. The research on NPC-MLI has been extensively researched in PV and DC Distribution Network due its influencing of the stability, lower total harmonic distortion (THD), and lower electromagnetic noise [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

A Three-Phase Transformerless T-Type- NPC-MLI for Grid Connected PV Systems with Common-Mode Leakage Current Mitigation

et al. 2019

Self Cite

View full text Add to dashboard Cite

DC to AC inverters are the well-known and improved in various kinds photovoltaic (PV) and gird tied systems. However, these inverters are require interfacing transformers to be synchronized with the grid-connected system. Therefore, the system is bulky and not economy. The transformerless inverter (TLI) topologies and its grid interface techniques are increasingly engrossed for the benefit of high efficiency, reliability, and low cost. The main concern in the TL inverters is common mode voltage (CMV), which causes the switching-frequency leakage current, grid interface concerns and exaggerates the EMI problems. The single-phase inverter two-level topologies are well developed with additional switches and components for eliminating the CMV. Multilevel inverters (MLIs) based grid connected transformerless inverter topology is being researched to avail additional benefits from MLI, even through that are trust topologies presented in the literature. With the above aim, this paper has proposed three -phase three-level T type NP-MLI (TNP-MLI) topology with transformerless PV grid connected proficiency. The CM leakage current should handle over mitigating CMV through removing unwanted switching events in the inverter pulse width modulation (PWM). This paper is proposes PV connected T type NP-MLI interface with three-phase grid connected system with the help of improved space vector modulation (SVM) technique to mitigate the CM leakage current to overcome the above said requests on the PV tied TL grid connected system. This proposed the SVM technique to mitigate the CM leakage current by selecting only mediums, and zero vectors with suitable current control method in order to maintain the inverter current and grid interface requirements. The proposed PV tied TNP-MLI offering higher efficiency, lower breakdown voltage on the devices, smaller THD of output voltage, good reliability, and long life span. The paper also investigated the CM leakage currents envisage and behavior for the three-phase MLI through the inverter switching function, which is not discussed before. The proposed SVM on TL-TNP-MLI offers the reliable PV grid interface with very low switching-frequency leakage current (200mA) for all the PV and inverter operation conditions. The feasibility and effectiveness of the TLI and its control strategy is confirmed through the MATLAB/Simulink simulation model directly as compared with 2kW roof top PV plant connected TL-TNP-MLI experimentation, showing good accordance with theoretical investigation. The simulation and experimental results are demonstrated and presented in the good stability of steady state and dynamics performances. The proposed inverter reduces the cost of grid interface transformer, harmonics filter, and CMV suppressions choke.

show abstract

Section: Introductionmentioning

confidence: 99%

A Three-Phase Transformerless T-Type- NPC-MLI for Grid Connected PV Systems with Common-Mode Leakage Current Mitigation

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…The three-level SVD based two-level SVD with reduced math function is proposed and implemented for NPC-MLI [9]. The similar idea is extended to linear modulation (LM) and over modulation (OVM) region with field programmable gate array (FPGA) implementation for NPC-MLI [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…Due to this complexity in the OVM region synthesization and on-time calculations, many studies are not preferred to include OVM region operation. Very few implementations have performed in the OVM region operation [21][22][23][24][25][26][27][28][29][30][31]. These implementations are using complex mathematical functions to realize the OVM non-linear region and on-time calculations.…”

Section: Introductionmentioning

confidence: 99%

“…These methods are relatively complex to implement [24,25]. Most of the OVM region studies in MLI SVM have been done by charging the reference vector position [23,24,[26][27][28][29][30]. The on-time switching calculations of OVM using virtual vectors were recognized by using modifying hexagonal trajectory.…”

Section: Introductionmentioning

confidence: 99%

“…These direct VHDL code based implementations have suffered from the drawbacks of computational burden (writing VHDL/Verilog coding), high device utilization, and higher time taken. Particularly at high modulation ranges, due to the higher mathematical burden, the processing time is being increased [23,29,42]. These methods are very effective for implementation in terms of calculating the switching vectors and dwell times by means of simple addition and comparison operators without using any angles, trigonometric function and LUTs.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Simple Multilevel Space Vector Modulation Technique and MATLAB System Generator Built FPGA Implementation for Three-Level Neutral-Point Clamped Inverter

Madasamy¹,

Pongiannan

Ravichandran³

et al. 2019

Energies

Self Cite

View full text Add to dashboard Cite

The pulse width modulation (PWM) is an important segment in power electronic inverters and multilevel inverters (MLIs) design. The space vector modulation (SVM) methods own distinct advantages over other PWM methods. However, MLI SVM has involved more mathematics in their executions. Hence, the digital signal processors (DSPs) or field programmable gate arrays (FPGAs) based digital implementations are highly preferred for MLI SVM realizations, which require exceptional properties. The conventional MLI SVMs use complex mathematical functions to solve their internal functions to identify the space vector diagram (SVD) sub-triangle and over modulation boundary switching on-times. Particularly these are the changes in the position of reference vector with respect to their sub-triangle positions involving higher mathematical functions. This paper proposes a simplified three-level MLI SVM that reduces the sub-triangle and over modulation switching on-time calculations with reduced mathematical functions. The proposed MLI SVM is derived based on two-level SVM without changing the reference vector position, unlike the traditional approaches. This helps in extending the SVM for any n-level inverter with additional LUTs. The detailed theoretical study, MATLAB-Simulink system generator simulations and Xilinx FPGA family SPARTAN-III-3A based experimental implementations are done with three-level neutral point MLI fed induction motor drive. The theoretical design, analysis, and experimentation results validate the advantages of the proposed PWM design and its implementation. In addition, the proposed implementation is executed from the MATLAB Xilinx system generator directly into target FPGA, which makes it faithful, efficient and minimizes the time spent.

show abstract

A hybrid output multiport converter for standalone loads and photovoltaic array integration

Palanisamy

Jeevananthan

Palanisamy³

2020

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

A Timing Correction Algorithm-Based Extended SVM for Three-Level Neutral-Point-Clamped MLI in Over Modulation Zone

Cited by 43 publications

References 31 publications

A Three-Phase Transformerless T-Type- NPC-MLI for Grid Connected PV Systems with Common-Mode Leakage Current Mitigation

A Three-Phase Transformerless T-Type- NPC-MLI for Grid Connected PV Systems with Common-Mode Leakage Current Mitigation

A Simple Multilevel Space Vector Modulation Technique and MATLAB System Generator Built FPGA Implementation for Three-Level Neutral-Point Clamped Inverter

A hybrid output multiport converter for standalone loads and photovoltaic array integration

Contact Info

Product

Resources

About