Abstract
In this paper, a unified power flow analysis is proposed for current diverters which are used for balancing series-stacked voltage domains, e.g. employed in photovoltaic (PV) energy systems or auxiliary power supplies with very high DC input voltage. This analysis allows to easily derive the power levels processed by the current diverters for any given operating point of the attached sources and/or loads representing the voltage domains. The proposed analysis is applied to two examples; on the one hand, PV systems are investigated where it is revealed that power-limited current diverters can only offer a benefit for light shading scenarios; on the other hand, auxiliary power supplies with extremely high-voltage conversion ratios are investigated.
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Kasper, M., Bortis, D. & Kolar, J.W. Unified power flow analysis of string current diverters. Electr Eng 100, 2085–2094 (2018). https://doi.org/10.1007/s00202-018-0682-z
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DOI: https://doi.org/10.1007/s00202-018-0682-z