A Multilevel Transformerless Inverter Employing Ground Connection Between PV Negative Terminal and Grid Neutral Point

Kadam, Abhijit; Shukla, Anshuman

doi:10.1109/tie.2017.2696460

Cited by 143 publications

(87 citation statements)

References 18 publications

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“…The first process is the preoccupation of incident photons to produce electron-hole pairs. A second process, the assembly of these carriers in the p-n junction, stops this recombination by using a p-n junction to spatially be isolated the electron and the hole in (2).…”

Section: Light Generated Current (Radiation)mentioning

confidence: 99%

“…In recent years dramatic improvements in energy generation due to the growth of population, development of new Industries and others need [1]. The power generated by using fossil fuels causing environmental issues and produce very harmful greenhouse gases, finally depletion of energy resources [2], [3]. This has led to an incredible growth of concentration in photovoltaic energy-based power generation.…”

Section: Introductionmentioning

confidence: 99%

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Intelligent controller based power quality improvement of microgrid integration of photovoltaic power system using new cascade multilevel inverter

Jayaraju¹,

Rao²

2019

IJECE

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<p>Now a day the power demand has a major problem for developing countries due to the growth of population, industries, IT companies and other needs. In this present situation the fossil fuel-based power generation alone does not support the consumer needs, poor power quality due to nonlinear function and very harmful for environment. The main objective of this paper is improving the power quality of grid connected photovoltaic power system through a new cascade H-bridge multilevel inverter. The proposed research work has been modelled and controlled by ANFIS intelligence in MATLAB simulation environment. The simulation results are analysed under various operating conditions for improve the performance of proposed system. Finally, the proposed system THD value of simulation results is compared with IEEE 1547 standard for prove the effectiveness of proposed research work.</p>

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Section: Light Generated Current (Radiation)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Intelligent controller based power quality improvement of microgrid integration of photovoltaic power system using new cascade multilevel inverter

Jayaraju¹,

Rao²

2019

IJECE

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“…Common-mode current in transformer less PV inverters creates severe electromagnetic interference and insecurity, further decreasing the efficiency of PV inverters. A H5 inverter topology is presented [33] in which, by common grounding of the PV array and AC grid, an extra switch is added between the input and the inverter bridge arms as shown in figure (9). But the junction capacitors of additional switch in H5 inverter topology will cause serious problem of CM current with its asymmetrical structure in practice.…”

Section: Fig7 Modified Z-source Inverter Topologymentioning

confidence: 99%

Technological Developments in Direct Grid Connected Power Converters for Solar PV Power Plants

Kumar¹,

Ganesh²

2019

IJEAT

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Most of the countries in the world are concentrating on renewable energy generation, due to day-day increase in population increasing the energy demand, also to make their environment sustainable. With the many of features, use of megawatts rating solar photovoltaic (PV) power plants are becoming more popular for upgrading the existing power generation throughout the world. Moreover, among the existing renewable energy generations, solar power is the primary choice to meet the rapidly increasing demands; since solar PV plant installing time is relatively quick, say about in 3- 4 months, compared to conventional (thermal, hydro & diesel) plants which may require about 3-4 years. The low voltage (270‒700V) power converters require a filter and a step-up transformer for interconnecting the local grids with solar PV power plants. The advances in power converters without transformers and filters have recently become more attractive for solar PV power plants connected directly to grid. The study of this article describes the essential requirement and the technological developments in the design of power electronics converters, together with their modulation schemes to integrate solar power directly with standard power grid. This article, review ongoing research activities and the probable directions for the future research in developing inverters for cost-efficient grid connected solar PV plants

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“…The complete closed loop control diagram for MPPT and grid current injection of the two-stage system 16,20 is shown in Figure 1. The gate pulses to the inverter switches are generated through modified sinusoidal level shifted pulse width modulation (SLS-PWM).…”

Section: System Descriptionmentioning

confidence: 99%

“…Furthermore, the number of levels in the output voltage of MLBC and hybrid MLI can be increased by adding basic unit. The complete closed loop control diagram for MPPT and grid current injection of the two-stage system 16,20 is shown in Figure 1. The detailed operation of MLBC, hybrid MLI, control strategy, and CMV analysis is explained in the following sections.…”

Section: System Descriptionmentioning

confidence: 99%

A new structure of single‐phase two‐stage hybrid transformerless multilevel PV inverter

Kuncham

Kirubakaran

Subrahmanyam

2018

Circuit Theory & Apps

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Transformerless inverters are becoming popular for grid-connected photovoltaic applications due to their simplicity, reduced size, weight, cost, and higher efficiency. In this paper, a two-stage hybrid transformerless multilevel inverter (MLI) for single-phase grid-connected photovoltaic power generation system (PVPGS) is presented. The proposed topology comprises a multilevel boost converter (MLBC) and a symmetrical hybrid MLI. MLBC combines the boosting and switched capacitor voltage functions to produce self-balanced multiple voltage levels. The proposed MLI is derived from a combination of bidirectional switches, a half bridge, and a diode-clamped branch, which can produce only two variations in the total common mode voltage and is capable of suppressing leakage current as per DIN VDE 0126-1-1 grid standards. It offers the advantages of scalability, reactive power capability, reduced total harmonic distortion, and filter size. The proposed hybrid transformerless seven-level inverter is simulated in MATLAB, and experimental setup is built to validate the effectiveness of the proposed configuration. Finally, a comprehensive comparison is made with other seven-level inverter topologies.

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A Multilevel Transformerless Inverter Employing Ground Connection Between PV Negative Terminal and Grid Neutral Point

Cited by 143 publications

References 18 publications

Intelligent controller based power quality improvement of microgrid integration of photovoltaic power system using new cascade multilevel inverter

Intelligent controller based power quality improvement of microgrid integration of photovoltaic power system using new cascade multilevel inverter

Technological Developments in Direct Grid Connected Power Converters for Solar PV Power Plants

A new structure of single‐phase two‐stage hybrid transformerless multilevel PV inverter

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