This book aims to present some advanced control methodologies for power converters. Power electronic converters have become indispensable devices for plenty of industrial applications over the last decades. Composed by controllable power switches, they can be controlled by effective strategies to achieve desirable transient response and steady-state performance, to ensure the stability, reliability and safety of the system. The most popular control strategy of power converters is the linear proportional–integral–derivative series control which is adopted as industry standard. However, when there exist parameter changes, nonlinearities and load disturbances in the system, the performance of the controller will be significantly degraded. To overcome this problem, many advanced control methodologies and techniques have been developed to improve the converter performance. This book presents the research work on some advanced control methodologies for several types of power converters, including three-phase two-level AC/DC power converter, three-phase NPC AC/DC power converter, and DC/DC buck converter. The effectiveness and advantage of the proposed control strategies are verified via simulations and experiments. The content of this book can be divided into two parts. The first part focuses on disturbance observer-based control methods for power converters under investigation. The second part investigates intelligent control methods. These methodologies provide a framework for controller design, observer design, stability and performance analysis for the considered power converter systems.
This book aims to present some advanced control methodologies for power converters. Power electronic converters have become indispensable devices for plenty of industrial applications over the last decades. Composed by controllable power switches, they can be controlled by effective strategies to achieve desirable transient response and steady-state performance, to ensure the stability, reliability and safety of the system. The most popular control strategy of power converters is the linear proportional–integral–derivative series control which is adopted as industry standard. However, when there exist parameter changes, nonlinearities and load disturbances in the system, the performance of the controller will be significantly degraded. To overcome this problem, many advanced control methodologies and techniques have been developed to improve the converter performance. This book presents the research work on some advanced control methodologies for several types of power converters, including three-phase two-level AC/DC power converter, three-phase NPC AC/DC power converter, and DC/DC buck converter. The effectiveness and advantage of the proposed control strategies are verified via simulations and experiments. The content of this book can be divided into two parts. The first part focuses on disturbance observer-based control methods for power converters under investigation. The second part investigates intelligent control methods. These methodologies provide a framework for controller design, observer design, stability and performance analysis for the considered power converter systems.
China’s new retail revolution will completely transform how the world thinks about retail and digital innovation. But is the world ready yet? In this book, the authors share an insider’s perspective on what is happening in China to reveal the future for global retail, and a clear framework to help you prepare. The book presents a number of real-world cases, based on interviews and first-hand consumer experience, to decode China’s retail revolution so that you can understand what is happening and why, and what it means for the rest of the world. Crucially, the book identifies five critical stages in the development of new retail that global retail executives need to grasp now: lifestyle commerce, Online-Merge-Offline retail, social retail, livestream retail and invisible retail. To help the industry get ready for this new, China-inspired paradigm in retail, the authors present a practical and simple framework – a ten-year strategic roadmap for global retail executives, which we call the “Beyond” the Value Chain Model. China’s new retail is not just about fashion, cosmetics, snacks, data-driven convenient stores and commercial live streaming. At a time when the world of retail is being upended, it offers inspirational lessons in innovation, purpose and agility for global executives across the entire retail spectrum.
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