Flexible AC Transmission Systems (FACTS)

Message from the PresidentCIGRE is the global expert community for electric power systems.It is a nonprofit organization based in Paris.It consists of members from over 100 countries representing 60 national committees.It functions as a virtual organization with members who are experts in their technical field, forming working groups dealing with issues facing the power delivery industry.In 2019, 230 working groups including more than 3000 experts were working together to resolve the identified issues.The output of the working groups is technical brochures.There are over 700 technical brochures, which contain the combined knowledge and practice of engineering experts from all over the world.The brochures are practical in nature enabling the engineer to plan, design, construct, operate, and maintain the power delivery systems as required.CIGRE has over 10,000 reference papers and other documents supporting the brochures and dealing with other relevant technical matters.This Green Book on Flexible AC Transmission Systems (FACTS) controllers, compiled by Study Committee (SC) B4, DC Systems and Power Electronics, provides state-of-the-art information on power electronic systems that can be used to support the changing needs of AC transmission systems.FACTS controllers can be used to enable higher power transfers and to maintain the power quality.The book comprises material from published technical peer-reviewed publications and technical experts in the field.CIGRE is a source of unbiased technical information.Engineers can refer this book without fear of favoring one supplier or country.It is a compilation of the combined expertise of many international experts providing an unbiased objective textbook in FACTS design.Like other CIGRE Green Books, this book contains input from many experts, not only one or two.These international experts have provided technical information relevant to readers irrespective of where the readers reside.The views expressed and suggestions made are unbiased objective statements.These can be used as references for engineers to develop standards and guidelines within their organizations.This book is a reference book for academia, power transmission engineers, consultants, and users.I would like to congratulate those involved from SC B4 who have compiled this book.Many of them have had to work in their spare time for hours to complete this v task, for which they worked as volunteers.I would recommend this book in forming the basis for transmission and distribution system design activities now and in the future.