dc.contributor.authorTang, Yi
dc.identifier.citationTang, Y. (2012). Development of control schemes for power converters and coordinated grid operation. Doctoral thesis, Nanyang Technological University, Singapore.
dc.description.abstractDevelopment of proper control schemes for three-phase pulse-width modulated (PWM) converters is crucial to achieve intended functions such as high conversion efficiency, low harmonic distortion and accurate control of real and reactive power flows. In this thesis, a complex-vector repetitive control scheme is first proposed for grid-connected inverters to achieve precise power flow control and also to reject harmonic disturbances induced from the grid and loads. Based on this control concept, a double-loop control scheme is then proposed for controlling power converters with output inductor-capacitor filters, and they can continuously supply critical and emergency loads during ac mains outage. In order to transfer electrical power into the grid more efficiently, an inductor-capacitor-inductor (LCL) filter is introduced and the accompanied stability issues are addressed. A systematic design of LCL-filter-based active power filter is presented to improve system power quality. To achieve harmonic free AC/DC power conversion, a one-cycle controlled active rectifier is proposed and its operation under non-ideal supply voltage conditions is also investigated. All the control algorithms and design methodologies presented in this thesis are verified by laboratory experimental results, which demonstrate their effectiveness and practicality.en_US
dc.format.extent194 p.en_US
dc.subjectDRNTU::Engineering::Electrical and electronic engineeringen_US
dc.titleDevelopment of control schemes for power converters and coordinated grid operationen_US
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.contributor.supervisorLoh Poh Chiang, Andrewen_US
dc.contributor.supervisorWang Pengen_US
dc.description.degreeDOCTOR OF PHILOSOPHY (EEE)en_US

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