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In this paper, a control strategy for power flow management of a grid-connected hybrid photovoltaic (PV)–wind-battery-based system with an efficient multi-input transformer-coupled bidirectional dc–dc converter is presented. The proposed system aims to satisfy the load demand, manage the power flow from different sources, inject the surplus power into the grid, and charge the battery from the grid...
In this paper a modification for a conventional 3-level DC-DC buck-boost converter is proposed for photovoltaic applications, to eliminate the problem of leakage current which is associated with this converter. With this modification it is possible to interface the proposed transformer-less converter with transformerless PV inverters without any galvanic isolation requirement from the grid. This transformer-less...
Reliability of the grid feeding or stand-alone inverter system is a concern. Apart from the power electronic switching devices, DC link capacitors have an impact on reliability of the whole system. Two different PWM switching schemes are analysed for a 3-level DC-DC converter connected to a single phase NPC inverter. To reduce the current stress on DC link capacitors, it is suggested to use inverter...
DC system for solar photovoltaic (PV) application is gaining popularity due to high efficiency and reliability. This system could be interconnected to ac and dc grids. For high availability of power supply to loads, energy storage elements are interconnected using dc-dc converters. Power management control for this system is necessary to ensure high utilization of renewable sources and stable operation...
Hybrid PV-wind based stand-alone systems have evolved as a promising solution for rural deployment where access to electrification is not viable. The conventional approach for the integration of multiple renewable sources and energy storage elements involves using dedicated single-input converters for each source and requires more number of converter stages leading to considerable reduction in reliability...
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