PWM Plus Phase Angle Shift (PPAS) Control Scheme for Combined Multiport DC/DC Converters

Li, Wuhua; Jian-guo, Xiao; Zhao, Yi; He, Xiangning

doi:10.1109/tpel.2011.2163826

Cited by 120 publications

(63 citation statements)

References 27 publications

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“…When the switch of the boost converter is open, a large current flows through the power components, and therefore, power components with high current stress are required, absence of energy supply from the PV modules, the battery can provide energy to the DC bus. The three-port DC/DC converter can operate in different modes, thereby reducing the cost and size of the system [26][27][28][29][30][31][32][33]. However, it has a larger size, higher cost, and lower efficiency compared with the converter proposed in the current study.…”

Section: Introductionmentioning

confidence: 93%

A High-Efficiency Isolated-Type Three-Port Bidirectional DC/DC Converter for Photovoltaic Systems

Chiu

2017

Energies

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This paper proposes a novel high-efficiency isolated three-port bidirectional DC/DC device for photovoltaic (PV) systems. The device contains a high step-up converter for PV modules to supply power to the DC bus, and a bidirectional charge/discharge control circuit for the battery with an improved boost-flyback converter. When the PV modules supply sufficient energy, their output can be stepped up and energy supply to the DC bus and charging of the battery can be achieved simultaneously. However, when the energy supplied is insufficient, the battery provides energy to the DC bus. When the proposed converter is operated in the step-down mode, the DC-blocking capacitor on the high-voltage side is used to reduce the voltage on the transformer and achieve high step-down performance. Moreover, to improve the overall efficiency of the system, the energy stored in the leakage inductance is recycled and supplied to the DC-blocking capacitor during operation in the step-up mode. Finally, to verify the feasibility and practicability of the proposed devices, a 500 W three-port bidirectional DC/DC devices was implemented. The highest efficiencies achieved for operation in different modes were as follows: high step-up mode for the PV modules, 95.2%; battery step-up mode, 94.2%; and step-down mode, 97.6%.

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Section: Introductionmentioning

confidence: 93%

A High-Efficiency Isolated-Type Three-Port Bidirectional DC/DC Converter for Photovoltaic Systems

Chiu

2017

Energies

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“…For the dc-inductor based topology, the root mean square (rms) current of the low voltage side switches can be calculated as in (12). ;…”

Section: Dtmentioning

confidence: 99%

“…Even though the switch output capacitance is not considered in (21), as explained in [12], the larger the output capacitance, the longer the critical dead time leading to a reduced ZVS range.…”

Section: Dtmentioning

confidence: 99%

Analytical comparison of dual-input isolated dc-dc converter with an ac or dc inductor for renewable energy systems

Zhang

Mira

Andersen

2017

2017 IEEE 3rd International Future Energy Electronics Conference and ECCE Asia (IFEEC 2017 - ECCE Asia)

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Abstract-This paper presents two configurations of dualinput (DI) or three-port (TPC) isolated dc-dc converters for hybrid renewable energy systems such as photovoltaics and batteries. These two converters are derived by integrating an interleaved boost converter and a single-active bridge converter with an ac inductor as a power interfacing element or phase-shift softswitching converter with an output dc inductor. Both converters are controlled by a pulse-width modulation and phase-shift hybrid modulation scheme. The two converter topologies are, even though quite similar from the topological and control perspective, distinct in operation principles, voltage/power transfer functions, loss distributions, soft-switching constraints, and power efficiency under the same operating conditions. Moreover, the inductor design differs greatly between these two cases. In this paper, a comprehensive comparison is given for the first time and thereby the corresponding design tradeoffs are discussed. Finally, a laboratory 1 kW prototype is constructed and tested to verify the theoretical analysis.

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“…The ac inductor, L ac , is the power interface element between the two inputs and the output port. In order to decouple the two power inputs as well as to effectively regulate the output voltage, a duty cycle plus phase-shift control strategy [13], [14] is adopted. The duty cycle of the primary side switches is used to control the power flow between the two independent sources, i.e.…”

Section: Introductionmentioning

confidence: 99%

Power flow control of a dual-input interleaved buck/boost converter with galvanic isolation for renewable energy systems

Mira

Zhang

Knott

et al. 2015

2015 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Abstract-DC microgrids or nanogrids have attracted increasing research interest in recent years. Therefore, as a critical component, dc-dc converters with multiple inputs are required. In this paper, a dual-input interleaved buck/boost converter is proposed and its corresponding power flow control methods are analyzed and designed accordingly. Furthermore, the design guidelines are discussed. Finally, in order to verify the validity of this study, the measurement results are presented.

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PWM Plus Phase Angle Shift (PPAS) Control Scheme for Combined Multiport DC/DC Converters

Cited by 120 publications

References 27 publications

A High-Efficiency Isolated-Type Three-Port Bidirectional DC/DC Converter for Photovoltaic Systems

A High-Efficiency Isolated-Type Three-Port Bidirectional DC/DC Converter for Photovoltaic Systems

Analytical comparison of dual-input isolated dc-dc converter with an ac or dc inductor for renewable energy systems

Power flow control of a dual-input interleaved buck/boost converter with galvanic isolation for renewable energy systems

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