Grid converters are the key player in renewable energy integration. The high penetration of renewable energy systems is calling for new more stringent grid requirements. As a consequence, the grid converters should be able to exhibit advanced functions like: dynamic control of active and reactive power, operation within a wide range of voltage and frequency, voltage ride-through capability, reactive current injection during faults, grid services support. This book explains the topologies, modulation and control of grid converters for both photovoltaic and wind power applications. In addition to power electronics, this book focuses on the specific applications in photovoltaic wind power systems where grid condition is an essential factor. With a review of the most recent grid requirements for photovoltaic and wind power systems, the book discusses these other relevant issues: modern grid inverter topologies for photovoltaic and wind turbines islanding detection methods for photovoltaic systems synchronization techniques based on second order generalized integrators (SOGI) advanced synchronization techniques with robust operation under grid unbalance condition grid filter design and active damping techniques power control under grid fault conditions, considering both positive and negative sequences Grid Converters for Photovoltaic and Wind Power Systems is intended as a coursebook for graduated students with a background in electrical engineering and also for professionals in the evolving renewable energy industry. For people from academia interested in adopting the course, a set of slides is available for download from the website. www.wiley.com/go/grid_converters
This 1997 book presents in readable, non-technical language the findings of scholarship on one important aspect of 'who Jesus was' - the many reports in the New Testament and other early Christian writings that Jesus performed healings. The book paints a picture of the sick and sickness in Jesus' world and the means available to deal with sickness. It shows how Jesus as healer fits - and doesn't fit - into that world. We see him as one of the many healers of his day, but set apart as a 'wounded healer' who in his own death achieves the ultimate 'healing', victory over death. In addressing the question 'did Jesus really heal?' the author provides readers with resources from biblical scholarship, medicine, sociology and anthropology to help arrive at their own answers to the question. The suggestions for further reading as well as the questions for discussion make this book ideal both for personal reading and for group study.
How women in turn-of-the-century Chicago used their consumer power to challenge male domination of public spaces and stake their own claim to downtown. Popular culture assumes that women are born to shop and that cities welcome their trade. But for a long time America’s downtowns were hardly welcoming to women. Emily Remus turns to Chicago at the turn of the twentieth century to chronicle a largely unheralded revolution in women’s rights that took place not at the ballot box but in the streets and stores of the business district. After the city’s Great Fire, Chicago’s downtown rose like a phoenix to become a center of urban capitalism. Moneyed women explored the newly built department stores, theaters, and restaurants that invited their patronage and encouraged them to indulge their fancies. Yet their presence and purchasing power were not universally appreciated. City officials, clergymen, and influential industrialists condemned these women’s conspicuous new habits as they took their place on crowded streets in a business district once dominated by men. A Shoppers’ Paradise reveals crucial points of conflict as consuming women accessed the city center: the nature of urban commerce, the place of women, the morality of consumer pleasure. The social, economic, and legal clashes that ensued, and their outcome, reshaped the downtown environment for everyone and established women’s new rights to consumption, mobility, and freedom.
Most Ontario universities were established by Christian denominations; a Christian ethos was assumed and pervasive, and students were required to take courses designed to teach and inculcate religion. This insightful and comprehensive study demonstrates how, as Ontario society became secularized and pluralistic, so too did universities. Today, religion is again studies in university classrooms but as “religious studies,” a relatively new field that reflects the religiously pluralistic nature of Ontario and the world-wide explosion of knowledge. This authoritative volume will be of interest to students of religion in and outside academic circles, to adminstratots of academic institutions and granting agencies and to persons wanting to know more about the social and cultural changes that have transformed Ontario and Canadian society.
A practical resource for valuing patents that is accessible tothe complete spectrum of decision makers in the patent process In today's economy, patents tend to be the most important of theintellectual property (IP) assets. It is often the ability tocreate, manage, defend, and extract value from patents that candistinguish competitive success and significant wealth creationfrom competitive failure and economic waste. PatentValuation enhances the utility and value of patents byproviding IP managers, IP creators, attorneys, and governmentofficials with a useable resource that allows them to use actual orimplied valuations when making patent-related decisions. Involves a combination of techniques for describing patentvaluation Includes descriptions of various topics, illustrative cases,step-by-step valuation techniques, user-friendly procedures andchecklists, and examples Serves as a useable resource that allows IP managers to useactual or implied valuations when making patent-relateddecisions One of the most fundamental premises of the book is that thesevaluation skills can be made accessible to each of the variousdecision makers in the patent process. Patent Valuationinvolves narrative descriptions of the various topics, illustrativecases, step-by-step valuation techniques, user-friendly proceduresand checklists, and an abundance of examples to demonstrate themore complex concepts.
I Remember Laurier is the story—actually, thirty-seven stories—of the little university that could, told by some of those who devoted themselves to transforming the school from its modest beginnings into a superb small liberal arts college, and in turn to the university whose growth, diversification, research, and partnerships characterize it today. Although the stories are diverse in content, viewpoint, and tone, readers will note a number of unifying themes, one being nostalgia for a small university where faculty, staff, and students were close and new initiatives were readily approved and easily implemented. Here too are reflections, sometimes bemused and sprinkled with humour, on professors, administrators, and students, the “Laurier Experience,” and significant events such as “WLU” becoming “WLU” (Waterloo Lutheran University was renamed Wilfrid Laurier University in 1973). Evident throughout is the pride of the contributors in the development of the university to its current status and in having played a role. In the photo album at the back of the book readers will find vintage prints of the authors and of many others mentioned in the book. More photos will soon be available on the website of the Wilfrid Laurier Retirees’ Association: http://www.wlu.ca/retirees.
Diabetes in children: a treatment and training program Diagnosis diabetes! You just heard about it. But what does that mean for you and for your parents? Ian (10 years old) has diabetes since a few years. He is talking about his everyday life, his favorite sports, his friends, and his experiences with the disease. In five chapters Ian explains: • What is diabetes actually? • Food and drinks for children with diabetes • How to treat myself well with insulin? • What do I need to do to keep my blood glucose from going too high or too low? • How do I notice that my blood glucose is too high or too low? Ian is telling you, what is important to know about diabetes and to have a good life like any other child: go to school, having parties, sports, and do everything, what else you love to do. He also has many practical tips for you, and you can train with him, how to get along well with diabetes. In the sixth chapter Ian introduces his twelve-year old friend Laura. Together with her parents she is just learning how she can calculate her insulin dose by herself. Each chapter ends with a small knowledge check – so you can see how much you've learned about diabetes. An extra brochure for your parents includes suggestions and assistance for a relaxed family life with diabetes.
Design, Control and Application of Modular Multilevel Converters for HVDC Transmission Systems is a comprehensive guide to semiconductor technologies applicable for MMC design, component sizing control, modulation, and application of the MMC technology for HVDC transmission. Separated into three distinct parts, the first offers an overview of MMC technology, including information on converter component sizing, Control and Communication, Protection and Fault Management, and Generic Modelling and Simulation. The second covers the applications of MMC in offshore WPP, including planning, technical and economic requirements and optimization options, fault management, dynamic and transient stability. Finally, the third chapter explores the applications of MMC in HVDC transmission and Multi Terminal configurations, including Supergrids. Key features: Unique coverage of the offshore application and optimization of MMC-HVDC schemes for the export of offshore wind energy to the mainland. Comprehensive explanation of MMC application in HVDC and MTDC transmission technology. Detailed description of MMC components, control and modulation, different modeling approaches, converter dynamics under steady-state and fault contingencies including application and housing of MMC in HVDC schemes for onshore and offshore. Analysis of DC fault detection and protection technologies, system studies required for the integration of HVDC terminals to offshore wind power plants, and commissioning procedures for onshore and offshore HVDC terminals. A set of self-explanatory simulation models for HVDC test cases is available to download from the companion website. This book provides essential reading for graduate students and researchers, as well as field engineers and professionals who require an in-depth understanding of MMC technology.
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