Novel Transformerless Grid-Connected Power Converter With Negative Grounding for Photovoltaic Generation System

Shen, Jia-Min; Jou, Hurng‐Liahng; Wu, Jinn‐Chang

doi:10.1109/tpel.2011.2170435

Cited by 171 publications

(66 citation statements)

References 25 publications

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“…This mode is terminated at t = t 4 until the secondary-side current i s equals zero. Therefore, D 3 is turned off and D 4 Figure 4c. The coupled inductor, DC source V in , and capacitor C 2 are connected to supply energy to the high-output voltage side capacitor C o1 and load.…”

Section: Ccm Operationmentioning

confidence: 99%

“…Therefore, previous studies have attempted to find a solution, hoping to solve the problems of air pollution, global warming, and energy shortage by using highly efficient renewable energy systems. The current more mature and widely used renewable energy sources include solar, wind, and tidal energy sources [2][3][4]. Often these renewable energy sources have low-voltage output and must pass through a set of high boost converter circuits to increase the voltage, and then through a DC-AC inverter to convert AC voltage from the main supply in parallel.…”

Section: Introductionmentioning

confidence: 99%

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A Novel High Step-Up DC-DC Converter with Coupled Inductor and Switched Clamp Capacitor Techniques for Photovoltaic Systems

et al. 2017

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Abstract:In this study, a novel high step-up DC-DC converter was successfully integrated using coupled inductor and switched capacitor techniques. High step-up DC-DC gain was achieved using a coupled inductor when capacitors charged and discharged energy, respectively. In addition, energy was recovered from the leakage inductance of the coupled inductor by using a passive clamp circuit. Therefore, the voltage stress of the main power switch was almost reduced to 1/7 V o (output voltage). Moreover, the coupled inductor alleviated the reverse-recovery problem of the diode. The proposed circuit efficiency can be further improved and high voltage gain can be achieved. The operation principle and steady-state analysis of the proposed converter were discussed. Finally, a hardware prototype circuit with input voltage of 24 V, output voltage of up to 400 V, and maximum power of 150 W was constructed in a laboratory; the maximum efficiency was almost 96.2%.

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Section: Ccm Operationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Novel High Step-Up DC-DC Converter with Coupled Inductor and Switched Clamp Capacitor Techniques for Photovoltaic Systems

et al. 2017

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“…An inverter is necessary in the power conversion interface to convert the dc power to ac power [2][3][4][5]. As we now that the output voltage of PV cell is very low hence, dc-dc power converter is needed in between the PV cell and inverter to boost the voltage level so, it can come to level of inverter dc bus voltage.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Multilevel Inverter Topologies Application with Photovoltaic Cell

2017

IJMTER

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-This paper proposes the solar power generation with dc-dc converter and seven level inverter. Here in paper comparison between the diode clamped inverter which is traditional method and ne proposed topology of inverter is made. Photovoltaic cell is used as dc voltage source which is fed to dc-dc converter and then to dc-ac inverter. The new proposed topology has less number of power electronic switches as compared to any traditional inverter topology. Here in this paper we have discuss in what aspect new proposed topology is advantageous to the traditional one.

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“…An efficient high-step-up interleaved DC-DC converter with a common active clamp [4]. Transformerless grid connected power converter for PV system [5,6]. Adaptive fuzzy controlled wind energy system [8].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation of Closed Loop Controlled Parallel Cascaded Buck Boost Converter Inverter Based Solar System

Sundar

Sankar²

2015

IJPEDS

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This Work deals with design, modeling and simulation of parallel cascaded buck boost converter inverter based closed loop controlled solar system. Two buck boost converters are cascaded in parallel to reduce the ripple in DC output. The DC from the solar cell is stepped up using boost converter. The output of the boost converter is converted to 50Hz AC using single phase full bridge inverter. The simulation results of open loop and closed loop systems are compared. This paper has presented a simulink model for closed loop controlled solar system. Parallel cascaded buck boost converter is proposed for solar system. Keyword: Bidirectional inverter INTRODUCTIONA DC-DC converter is a vital part of alternative and renewable energy conversion, portable devices, and many industrial processes. It is essentially used to achieve a regulated DC voltage from an unregulated DC source which may be the output of a rectifier or a battery or a solar cell etc. Nevertheless, the variation in the source is significant, mainly because of the variation in the line voltage, running out of a battery etc., but within a specified limit. Taking all these into account, the objective is to regulate the voltage at a desired value while delivering to a widely varying load. A DC-DC switching regulator is known to be superior over a linear regulator mainly because of its better efficiency and higher current-driving capability. There are various topologies in the context of DC-DC converters the buck-boost converter are widely used. The basic circuit of buck-boost converter is shown in Figure 1. The output voltage of a DC-DC converter is controlled by operating it in the closed loop, and altering its MOSFET (switch) gate signal accordingly. It is basically governed by a switching logic, thus constituting a set of subsystems depending upon the status (on-off) of the switch. In the well known pulse width modulation (PWM) technique, the control is accomplished by varying the duty ratio of an external fixed frequency clock through one or more feedback loops, whenever any parameter varies. PI controllers are the most widely-used type of controller for industrial applications. They are structurally simple and exhibit robust performance over a wide range of operating conditions. In the absence of the complete knowledge of the process, these types of controllers are the most efficient choices. Power-Management strategies for a grid connected PV-FC hybrid system [1]. Optimized wind energy harvesting system using resistance emulator and active rectifier for wireless sensor nodes [2]. A hybrid

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Novel Transformerless Grid-Connected Power Converter With Negative Grounding for Photovoltaic Generation System

Cited by 171 publications

References 25 publications

A Novel High Step-Up DC-DC Converter with Coupled Inductor and Switched Clamp Capacitor Techniques for Photovoltaic Systems

A Novel High Step-Up DC-DC Converter with Coupled Inductor and Switched Clamp Capacitor Techniques for Photovoltaic Systems

Comparative Study of Multilevel Inverter Topologies Application with Photovoltaic Cell

Modeling and Simulation of Closed Loop Controlled Parallel Cascaded Buck Boost Converter Inverter Based Solar System

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