From the author of "A Wall of White," the thrilling account of a spectacular mountain rescue after six climbers are struck by lightning in the Upper Exum Ridge of the Grand Teton near a 13,000-foot elevation.

This book addresses the latest findings on practical ultra-high voltage AC/DC (UHVAC/UHVDC) power transmission. Firstly, it reviews current constructions and future plans for major UHVDC and UHVAC projects around the world. The book subsequently illustrates the basic theories, economic analysis, and key technologies of UHV power networks in detail, and describes the design of the UHVAC substations and UHVDC converter stations and transmission lines. A wealth of clear and specific figures and formulas help readers to understand the fundamental theories underlying UHVAC and UHVDC technologies, as well as their developmental trends. This book is intended for graduate students, researchers and engineers in the fields of power systems and electrical engineering.

Measurement and Analysis of Overvoltages in Power Systems Jianming Li, Professor, State Grid Corporation, China A combination of theory and application, this book features practical tests and analytical techniques comprehensively with engineering practicality as its focus. Based on years of research and industry experience, the author introduces many scientific research methods such as overvoltage simulation studies, dynamic simulation experiment platform development and application, and overvoltage pattern recognition. Readers will get a good grounding in the various sources of overvoltages in power systems, methods in on-line measurements as well as explanations of overvoltage formation mechanisms and monitoring analysis methods. •Systematically examines sources, online measurements, analytical techniques, and simulations of overvoltages, with an emphasis on engineering practicality •Presents practical engineering examples analyzing overvoltages and improving system operation, based on field experiments and data analysis •Features overvoltage simulations and waveform analysis in transmission systems Measurement and Analysis of Overvoltages in Power Systems is intended as an all-in-one guide for engineers and researchers in power systems engineering. It can be used as a reference text for graduate students and lecturers of electrical engineering.

The Learning Elementary Science is a series consisting of three books (Classes 6 to 8), based on the latest curriculum and rationalised content released by the NCERT. The importance is given on the development of different skills as per NEP 2020. It includes understanding of concepts, processes and natural phenomena along with the development ofthinJdng ability and curiosity towards scientific activities. Key Feamra of t.he Series: • based on ratiooaUsed content as preKI"ibed by NCERT* u per NEP 2020 recommendation to reduce content load and provide opportunities for experiential learning with creative mindset. • follows thematic approach in each chapter. • presents the content in a dear* concise and logical manner. • presents language in simple and comprehensible fgrm, considering the age and grade appropriateness of students. • adopts an inquisitive approach that would help both students and teacher to interact cordially in the process of learning. • aims at encouraging inventiveness and competence in students. • contains vibrant colourful Wustratlons and pletu.res to grab the interest and attention of students as well as for the clarity of concepts. • contain topics and sub-topics embedded with intext activities and exercises that encourage experiential learning. • provides well-formulated questions, which address the different cognitive levels and various skills in learners as per NEP 2020 (Art Integration, Case Study Based, AppUcation, Analyse, Assertion-Reaso* Problem Solving, etc). • includes the Life Skills and Value-based question• which help the learners to relate the theoretical concept with different real life situations. Teacher's Re!ouree Books • Plan to a*bieve the Learning Objectives for effective teaching techniques. • OVerview of the Lesson. for easy recapitulation of the lesson. • Complete Solution-key of the Textbooks. Online Suppctrt • Video Lectures and Animated Videos • Interattive Exerciwes • Cbapter-wise Worksheets • Science Dictionary • E-Book (For Teadaer1 Only) We are sure this series will make learning science a fascinating, effective and engaging process for the students. Looking forward to your valuable suggestions. -Author

A reliable and secure protection and control system is a paramount requirement for any electrical network. This book discusses protection and control schemes of various parts of Solar Power Plants (SPP) namely solar generator, inverter, and SPP network connected to the grid. For this purpose small, medium, and large size of solar power energy sources have been considered. This includes residential, commercial buildings and large power plants. There are significant literature about solar energy, modeling and different aspects of integration of SPP to grids. But there is no book to address directly the setting/design of protection and control schemes, testing techniques and fault findings of solar generators and its networks. The topology and characteristics of solar generators and their networks are different from conventional ones. This has caused the following issues: - Conventional protection & control scheme may fail to detect different type of faults which may occur on solar cells/panels/arrays, DC cables, and inverters. This necessitated the requirement of special schemes for the detection of faults in blind spots, - Fault findings required tests, and testing equipment for solar generators are different from conventional ones, - The fault current contribution from solar generators is low (1.1-1.2 pu) as compared to conventional ones. The above problems have caused significant challenges for appropriate setting and design of protection & control scheme of SPP network which in some cases have resulted to several major plants shut down, safety risks and fire incidents. This book discusses the above challenges and proposes mitigation techniques to rectify the deficiencies of existing industry practices for the protection and control systems of solar generators. Most of the content of this book has been observed or successfully applied in the field for various SPPs projects worldwide and consequently can be used or considered as a practical guideline for future projects. Main Objectives of the Book The main objectives of the book are: - To familiarize engineers, technical officers, testers, and project managers with required power system protection and control schemes of solar power plants (SPP). - To provide a guideline for preparation of standards, technical specification, business case, functional scope, test, and commissioning plan as applicable to the installation of new SPP; - To provide adequate information to electricity companies, consultants, contractors, relay manufacturers,s and SPP owners about the requirement of protection and control systems of SPP. Acknowledgment The author wishes to acknowledge that the contents of this book are based on utilizing the following resources: 1) Extensive research of the author for design, specifications, and commissioning of SPPs 2) Experiences of other individuals, electricity companies, and consultants Disclaimer The author is not responsible for the accuracy, completeness, up-to-dateness, or quality of the information provided. The author is therefore not liable for any claims regarding damage caused by the use of any information provided. The information in the book should only be used as a guideline and may not be suitable for a specific case. Copyright The material made available is intended for the customer’s personal use only. Author reserves all rights to the book. Therefore the book can not be reproduced or replicated or processed or distributed without the author’s written permission.

"Akashvani" (English) is a programme journal of ALL INDIA RADIO, it was formerly known as The Indian Listener. It used to serve the listener as a bradshaw of broadcasting ,and give listener the useful information in an interesting manner about programmes, who writes them, take part in them and produce them along with photographs of performing artists. It also contains the information of major changes in the policy and service of the organisation. The Indian Listener (fortnightly programme journal of AIR in English) published by The Indian State Broadcasting Service, Bombay, started on 22 December, 1935 and was the successor to the Indian Radio Times in English, which was published beginning in July 16 of 1927. From 22 August ,1937 onwards, it used to published by All India Radio, New Delhi. From 1950,it was turned into a weekly journal. Later, The Indian listener became "Akashvani" (English ) w.e.f. January 5, 1958. It was made fortnightly journal again w.e.f July 1,1983. NAME OF THE JOURNAL: AKASHVANI LANGUAGE OF THE JOURNAL: English DATE, MONTH & YEAR OF PUBLICATION: 14 NOVEMBER, 1976 PERIODICITY OF THE JOURNAL: Weekly NUMBER OF PAGES: 214 VOLUME NUMBER: Vol. XLI. No. 46 BROADCAST PROGRAMME SCHEDULE PUBLISHED (PAGE NOS): 161-204 ARTICLE: 1. Nehru: The Architect of Free India's Science Policy 2. Science for Peace and Progress 3. Aeronautical Reserch in India 4. Sun Basket 5. Reorienting Science and Technology in India 6. Drift of India and the Rise of Himalayas 7. Can We Move to the Past ? 8. Achievements in Oceanography 9. Utilizing The Service of Indian Scientists Abroad 10. Why Research in Astrophysics ? 11. Astrology Vs Futorology ? AUTHOR: 1. A. Ranganathan 2. Dr. Hari Narain 3. Dr. S. R.Valluri 4. An Interview with the Inventor Dr.Von Oppen 5. Smt. Indira Gandhi 6. Aniruddha De 7. Hiranmay Ghosh 8. S. Z. Qasim 9. Dr. Y. Nayudamma 10. Dr. Sanat Biswas 11. Prof. B. V. Raman KEYWORDS : 1. Scienfitic Triumphs,Indian Atomic Energy Commission,Vital Significance,Greatest Enterprise. 2.Universe,Molocular Biology,Selective Application, Piorities for Undeveloped,Some Questions. 3. Aerodynamic Forces, Wind Tunnel Testing,Structural Designer.Lighter Frames,Population System, Research and Development. 4. No Keywords. 5.Gandhiji and Nehruji' Concern for Rural Development. Boost to Rural Engineering, Towards Self Reliance, Need for integrated Approach. 6.Attractive Hypothesis, Spreading of Ocean Floors. Inerted Sequence, The Himalayas. Prasar Bharati Archives has the copyright in all matters published in this “AKASHVANI” and other AIR journals. For reproduction previous permission is essential.

In the present edition,authors have made sincere efforts to make the book up-to-date.A noteable feature is the inclusion of two chapters on Power System.It is hoped that this edition will serve the readers in a more useful way.