Common mode and differential mode circulating-current control in paralleled single-phase boost rectifiers

Liao, Yi‐Hung; Chen, Hung-Chi; Cheng, Hsiu-Che

doi:10.1109/apec.2013.6520234

Cited by 3 publications

(2 citation statements)

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“…Different types of circulating current issues are also found in other multimodule systems, such as CMI-based ac drives [29], [30], CMI-based magnetic resonance imaging systems [31], and paralleled boost rectifiers [32], [33]. In CMI-based ac drive systems, circulating bearing current is induced by the inverter CM voltage imposed on the motor stator winding to frame capacitance [29], [30].…”

Section: Introductionmentioning

confidence: 99%

“…The high-amplitude MHz voltage ringing over the semiconductor device is the main concern in that paper, while the ground leakage current has not been discussed. For paralleled converters, circulating currents are generated due to the asynchronous switching operations [32], [33]. In such kind of systems, since there is no capacitance involved in the circulating loop, most highfrequency circulating currents can be mitigated by interphase inductors.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Suppression of Leakage Current in Cascaded-Multilevel-Inverter-Based PV Systems

Zhou

2014

IEEE Trans. Power Electron.

133

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The transformerless cascaded multilevel inverter (CMI) is considered to be a promising topology alternative for low-cost and high-efficiency photovoltaic (PV) systems. However, the leakage current issue resulted from the parasitic capacitors between the PV panels and the earth remains a challenging in designing a reliable CMI-based PV system. In this paper, the leakage current paths in PV CMI are analyzed and the unique features are discussed. Two filter-based suppression solutions are then presented to tackle the leakage current issue in different PV CMI applications. Simplified leakage current analytical models are derived to study the suppression mechanisms and design the suppression filters. Study cases are demonstrated for each of the solutions with filter design example, simulation and experimental verifications.

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