Download Free High Frequency Isolated Bidirectional Dual Active Bridge Dc Dc Converters With Wide Voltage Gain Book in PDF and EPUB Free Download. You can read online High Frequency Isolated Bidirectional Dual Active Bridge Dc Dc Converters With Wide Voltage Gain and write the review.

Written by experts, this book is based on recent research findings in high-frequency isolated bidirectional DC-DC converters with wide voltage range. It presents advanced power control methods and new isolated bidirectional DC-DC topologies to improve the performance of isolated bidirectional converters. Providing valuable insights, advanced methods and practical design guides on the DC-DC conversion that can be considered in applications such as microgrid, bidirectional EV chargers, and solid state transformers, it is a valuable resource for researchers, scientists, and engineers in the field of isolated bidirectional DC-DC converters.
Galvanically-isolated bidirectional dc-dc converters (IBDCs) have recently received more attention due to its increasing use in systems requiring energy transfer between two dc networks in both directions, requiring galvanic isolation and a high voltage gain. Some of these systems are energy storage systems, vehicle-to-grid power interfaces, fuel cell energy systems, uninterruptable power supplies, high-voltage dc links for electric-energy transmission, and solid-state transformers.The most prominent IBDC, thanks to its good performance, is the dual-active-bridge (DAB) converter. It features a high power density, a wide dc-voltage gain working range, a low count of passive components, and an exceptional transformer utilization. Nevertheless, the DAB converter suffers from a significant performance deterioration when operating at conditions different from its nominal design working point. This problem has been alleviated by designing complex modulation schemes, which require a high computational effort and are highly dependent on the parasitic-component values. On the other hand, as DAB converters have been lately introduced in high-power applications, higher voltages are needed in the dc links in order to achieve reasonable efficiency values. This has led to the use of multilevel topologies on the DAB converters, mainly multilevel neutral-point-clamped (NPC) topologies. However, the little and recent literature in this topic have not fully explored the operational capabilities and performance benefits of multilevel DAB converters.The aim of this thesis is to study the viability of multilevel NPC DAB (ML-DAB) converters, where the major faced challenge is the dc-link capacitors voltage balancing. First, three particular ML-DAB converters are studied, with the same number of levels on each side; the three-level, four-level, and five-level topologies (3L-DAB, 4L-DAB, and 5L-DAB, respectively). Suitable switching sequences, modulation schemes, and control schemes are designed for the proposed ML-DAB converters. The converter switching and conduction losses are studied with three figures of merit, resulting in a set of practical solutions that define the modulation parameters and achieve satisfactory converter-performance figures. These results are then generalized to the N-level topology (NL-DAB). Finally, the feasibility of ML-DAB converters with an asymmetric number of levels is also demonstrated.
This book provides rigorous discussions, case studies, and recent developments in the emerging areas of a control system, especially load frequency control, wide-area monitoring, control and instrumentation, optimization, intelligent control, energy management system, SCADA systems, etc. The readers would be benefitted from enhancing their knowledge and skills in the domain areas. Also, this book may help the readers in developing new and innovative ideas. The book can be a valuable reference for researchers and professionals interested in developments in the control system.
Electric vehicles are changing transportation dramatically and this unique book merges the many disciplines that contribute research to make EV possible, so the reader is informed about all the underlying science and technologies driving the change. An emission-free mobility system is the only way to save the world from the greenhouse effect and other ecological issues. This belief has led to a tremendous growth in the demand for electric vehicles (EV) and hybrid electric vehicles (HEV), which are predicted to have a promising future based on the goals fixed by the European Commission's Horizon 2020 program. This book brings together the research that has been carried out in the EV/HEV sector and the leading role of advanced optimization techniques with artificial intelligence (AI). This is achieved by compiling the findings of various studies in the electrical, electronics, computer, and mechanical domains for the EV/HEV system. In addition to acting as a hub for information on these research findings, the book also addresses the challenges in the EV/HEV sector and provides proven solutions that involve the most promising AI techniques. Since the commercialization of EVs/HEVs still remains a challenge in industries in terms of performance and cost, these are the two tradeoffs which need to be researched in order to arrive at an optimal solution. Therefore, this book focuses on the convergence of various technologies involved in EVs/HEVs. Since all countries will gradually shift from conventional internal combustion (IC) engine-based vehicles to EVs/HEVs in the near future, it also serves as a useful reliable resource for multidisciplinary researchers and industry teams.
The book presents the analysis and control of numerous DC-DC converters widely used in several applications such as standalone, grid integration, and motor drives-based renewable energy systems. The book provides extensive simulation and practical analysis of recent and advanced DC-DC power converter topologies. This self-contained book contributes to DC-DC converters design, control techniques, and industrial as well as domestic applications of renewable energy systems. This volume will be useful for undergraduate/postgraduate students, energy planners, designers, system analysis, and system governors.
This book presents a series of new topologies and modulation schemes for soft-switching in isolated DC–DC converters. Providing detailed analyses and design procedures for converters used in a broad range of applications, it offers a wealth of engineering insights for researchers and students in the field of power electronics, as well as stimulating new ideas for future research.
With the development of renewable energies, such as wind energy and solar energy, the dc power system becomes a promising candidate to manage and transfer the re-newable energy source, which stimulates the study of the dc-dc converters in the past decades. Among various dc-dc converters, the dual-active-bridge (DAB) dc-dc con-verter is regarded as one of the most promising candidates for the dc power conver-sion due to merits like isolated, high-efficiency, bidirectional, and ultrafast dynamic characteristics. Except the DAB dc-dc converter, there are some other isolated dc-dc converters such as full bridge dc-dc converter, three-phase DAB dc-dc converter, etc. They normally have similar dynamic characteristics as the DAB dc-dc converter featuring intermediary inductive ac-link (I2ACL) configuration. However, they are rarely investigated in existing literature, especially for better dynamic control performance. To fill such a gap, the dynamic equivalence between the DAB dc-dc converter and other I2ACL isolated dc-dc converters is revealed with the thorough overview of the existing I2ACL topologies in this work. Further, a unified fast-dynamic direct-current control scheme is proposed for significantly improving the dynamic performance of these I2ACL isolated dc-dc converters. With this predetermined analysis, the dynamic control schemes for the DAB-based dc-dc converter systems can be easily extended to other I2ACL converters with the same configurations. The single DAB dc-dc converter has been extensively investigated, but its modular-ized converter systems such as input-parallel output-parallel (IPOP), input-independent output-parallel (IIOP), in-put-parallel output-series (IPOS), and input-series output-parallel (ISOP) configurations have been seldomly covered in the existing research. Particularly, it is emergent to improve the dynamics, e.g. the input-voltage disturbance, the load-condition change and the power sharing disturbance. In this work, the advanced dynamic controls for these modular DAB dc-dc converter systems are proposed, featuring the flexible power sharing control performances with fast-dynamic responses. Moreover, to realize the reliable operation of these DAB-based systems, the hot swap operations are presented. To ensure the desired power sharing performance, the circuit-parameter estimating methods are proposed for these DAB-based converter systems. This work expands scope of the application of the DAB-based converter system in the partial power processing (PPP). Different from the existing literatures focusing on embedding renewable energy source into the strong ac system, this work proposes a PPP converter system, which can realize the independent control of the renewable energy source and the stabilization of the total dc bus. Combining with DAB module, the DAB-based PPP converter system is proposed. Then, as one of the important functions, the stabilization of the total dc bus should be further improved for this DAB-based converter system. In detail, a high-robustness control strategy is proposed to realize the fast-dynamic control, and the operation when one renewable energy source is out of work is also presented. Notably, the renewable energy should feature the current output and the limited output-voltage regulation such as PV, fuel cell and wind turbine with ac-dc conversion. By using the PV as an example, the effectiveness of the novel system is verified with following results: 1). The maximum power point tracking of the PV panels can be realized by using the existing method. 2). By using the proposed high-robustness control scheme, the total dc-link voltage can maintain at its desired value when the irradiance of PV panels, the voltage of the battery and the load condition are changed, and even when the PV panel is heavily shaded.