2002 · 31 citations · 8 references
EngineeringElectrical EngineeringFault ToleranceFault-tolerant SystemsPower ElectronicsDc-ac InvertersDc-dc ConvertersPower SystemsRenewable Energy Power ConversionSolar Energy SystemsVoltage RegulationCurrent Control Of Power ConvertersFault Tolerant OperationMaximum Power OutputOutput Voltage RegulationPhotovoltaic InvertersPower Conversion Control StrategiesSolar Photovoltaic Power SystemsSystem Expansion
An improved maximum power tracking (MPT) approach with dither signal injection is presented. It incorporates a "shared-bus" current-sharing method that can regulate many paralleled current-mode DC-DC converters. Through simulation, the approach yields nearly uniform current-sharing as well as reliable MPT performance. Utilizing the combined current-sharing and MPT approaches, three proposed architectures provide several advantages: (1) ease of system power expansion, (2) stable current-sharing, and (3) autonomous MPT during loss of output voltage regulation. Both stable amplitude and frequency of array voltage ripple are maintained by the robust MPT control.
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Modeling and analysis of spacecraft power systems