Capacitor-less photovoltaic (PV) cell-level power balancing using diffusion charge redistribution

Chang, Arthur H.; Avestruz, Al-Thaddeus; Leeb, Steven B.

doi:10.1109/apec.2014.6803386

Cited by 9 publications

(16 citation statements)

References 26 publications

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“…The existing analysis has been generalized to characterize the proposed multiple-input single-output distributed power generation system [1] to derive the respective FSL and SSL loss components for the ladderconnected DCR topology.…”

Section: Single-output Switched-ladder Dcrmentioning

confidence: 99%

“…This constitutes an insertion loss, which is the additional conversion loss compared to a series string under perfectly matched condition. The insertion loss, though shown to be manageable, sets design constraints on the switch sizing and especially the switching frequency based on the available intrinsic solar cell capacitance [1].…”

Section: Single-output Switched-ladder Dcrmentioning

confidence: 99%

“…In particular, the FSL and SSL components of the percentage insertion loss can be derived [1] as shown in (1) …”

Section: Single-output Switched-ladder Dcrmentioning

confidence: 99%

“…A fully scalable, cell-level power balancing architecture using DCR was first proposed in [1] and illustrated in Fig. 1.…”

Section: Single-output Switched-ladder Dcrmentioning

confidence: 99%

“…Recent work has shown that the intrinsic diffusion capacitance of the solar cells can be used to performing power balancing effectively [1]. By using the diffusion charge redistribution (DCR) technique with a scalable ladder structure of solar cells, maximum power point tracking can scale down to the finest cell-level granularity.…”

Section: Introductionmentioning

confidence: 99%

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Differential diffusion charge redistribution for photovoltaic cell-level power balancing

Chang¹,

Leeb²

2014

2014 International Conference on Renewable Energy Research and Application (ICRERA)

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Abstract-Mismatch loss remains an important issue to address in PV systems, and many power electronic solutions have been proposed to recover these losses. However, conventional power electronics for solar power optimization often have to make tradeoffs among conversion efficiency, optimization granularity, and overall system cost. This paper presents a cell-level power balancing scheme that breaks the existing design paradigm. The proposed architecture simultaneously achieves maximum power point tracking without any external passive components at the cell-level, and maintains differential power processing with zero insertion loss. This is accomplished by leveraging the recently proposed diffusion charge redistribution technique, taking advantage of the readily available diffusion capacitance of solar cells to perform power balancing rather than relying on adding costly energy storage components. Furthermore, a dual current inverter interface is introduced to avoid processing commonmode generated power in order to minimize overall conversion loss. Significant boost in overall system efficiency is achieved under both matched and partial shading conditions. Simulation results are included to demonstrate the feasibility and benefit of this approach.

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Section: Single-output Switched-ladder Dcrmentioning

confidence: 99%

Section: Single-output Switched-ladder Dcrmentioning

confidence: 99%

“…In particular, the FSL and SSL components of the percentage insertion loss can be derived [1] as shown in (1) …”

Section: Single-output Switched-ladder Dcrmentioning

confidence: 99%

“…A fully scalable, cell-level power balancing architecture using DCR was first proposed in [1] and illustrated in Fig. 1.…”

Section: Single-output Switched-ladder Dcrmentioning

confidence: 99%

Section: Introductionmentioning