New current feed back control method for solar energy inverter using digital signal processor

Takebayashi, Toru; Nakata, Haruki; Eguchi, Masaki; Kodama, Hiroaki

doi:10.1109/pccon.1997.638280

Cited by 6 publications

(1 citation statement)

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“…When isolation is required, it can be accomplished by introducing a line frequency transformer between the output filter and the grid utility [6]. Reduction of the physical size and cost of the inverter can be achieved by placing the isolation transformer at a high frequency branch as proposed in [7,8]. A high frequency PWM non-isolated inverter that operates under soft-switching conditions was proposed in [9] while an isolated soft-switched inverter was shown in [10].…”

Section: Introductionmentioning

confidence: 99%

Current sourcing isolated grid connected inverter

Zeltser

Ben‐Yaakov

2010

Proceedings of 2010 IEEE International Symposium on Circuits and Systems

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This study proposes a soft switched Output Current Sourcing (OCS) grid connected inverter that applies a high frequency isolation transformer. Current sourcing at the output implies that, ideally, the injected current will be independent of the load voltage. The current injected to the line is controlled by varying the switching frequency and PWM at low currents. The system does not require the sensing of the output current or even the line voltage -except for synchronization. This is in contrast to the conventional voltage sourcing inverters where the small disturbance at the line voltage may lead to current run away and consequently a tight current feedback loop must be applied.The proposed topology and several proposed control approaches were analyzed and verified by simulations and by experiments. The simulation and experimental results confirm the theoretical analysis and show that the proposed inverter can be operated with no sensing of the line current or voltage except for synchronization.

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Section: Introductionmentioning

confidence: 99%

Current sourcing isolated grid connected inverter

Zeltser

Ben‐Yaakov

2010

Proceedings of 2010 IEEE International Symposium on Circuits and Systems

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Comparison and performance evaluation of renewable to grid integration schemes: Single-phase high-frequency fuel cells and PV inverters applications

Rathore

2011

2011 IEEE Energy Conversion Congress and Exposition

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This paper compares and evaluates two currentcontrolled interfacing schemes for integrating renewable energy sources to a single-phase utility/grid using multi-stage high-frequency (HF) transformer isolated power conditioning system. Operation, merits and demerits are discussed for each scheme with operating waveforms. Several features e.g., utility line power factor, line current THD, size of power electronics system, ease of connection to utility line and simplicity of control, risk of transformer saturation, losses and components ratings in power electronics system, high power density design, and most significantly the size and cost of electrolytic capacitor are compared. Based on their competitive and comparative beneficial features, characteristics of energy source(s), and given specifications, a suitable scheme is justified. I.978-1-4577-0541-0/11/$26.00 ©2011 IEEE

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