Zero-sequence voltage boost of photovoltaic power station
Active power backflow mechanism of three-phase photovoltaic solid-state transformer based on cascaded H-bridge topology during low-voltage ride-through is explored in reference [18], and
In this paper, a 0.1–4.2V input boost converter with 1.5 μA quiescent current consumption for microscale photovoltaic energy harvesting applications is proposed. The chip integrates a charge-pump-based three-phase self-start circuit that actives the converter with an input voltage of 0.6V.
The proposed energy harvesting system accommodates a wide input voltage range of 0.1–4.2V and an output power range of 5μW-460mW, which are wider than the prior results. This flexibility allows for the combination of various single PV cells to cater to the diverse power requirements of IoT devices. Table 2.
The 0.1–4.2V-input boost converter covers a wide output power of 15μW-450mW. A pre-charge-based three-phased self-start circuit is proposed. The zero current detector can adapt a wide range of inductor current slope. A low-power and self-triggered voltage detection circuit is proposed.
This article presents a photovoltaic (PV) energy harvesting system that operates over a wide input voltage range. A three-phase self-start technique, characterized by its area saving and effectiveness, enables the system to initiate operation from an input voltage as low as 0.6V.
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