Microgrids: Architectures and Controls

Microgrids: Architecture and Controls

By Dr. Nikos Hatziargyriou

Hardcover: 340 pages

Series: Wiley - IEEE

Published by Wiley-IEEE Press; First edition (March 3, 2014)

ISBN-13: 978-1118720684

ISBN-10: 1118720687


First Edition

Microgrids are the latest component of the electric power system that is new to energy professionals, including protection, automation and control specialists. That is why we need to learn about what they are and how they work in order to be able to find the best ways to protect them under different abnormal system conditions.
This book is the result of a six-year joint European collaborative work under two research projects involving researchers from manufacturers, utilities and academia from 12 European Union countries.

Thework was coordinated by the editor of the book - Dr. Nikos Hatziargyriou, a professor at the Power Division of the Electrical and Computer Engineering Department of the National Technical University of Athens. He is IEEE Fellow, past Chair of the Power System Dynamic Performance Committee and Chair of CIGRE SC C6 "Distribution Systems and Distributed Generation". He is co-chair of the EU Advisory Council of the Technology Platform on SmartGrids. Many of the participants in the projects are co-authors of the different chapters in the book.  

The first chapter of the book introduces the concept of the microgrid and explains what they are, and what they are not, by comparing them with Virtual Power Plants (VPPs). It also includes some ot the issues related to their operation and control, electricity markets and regulation, together with a roadmap for development in Europe.

Chapter 2 is dedicated to control issues. The energy management of microgrids requires an hierarchical control system including centralized or de-centralized architectures that can be based on multi-agent system concepts.

The third chapter describes the services and capabilities for voltage and frequency control in interconnected and islanded modes, as well as during the transition between the two modes.

Chapter 4 is probably the one of most interest to the readers of the PAC World magazine, because it focuses on the protection of microgrids. It discusses the challenges presented by the different types of DERs due to their varying operating modes and the limited fault contributions. Adaptive protection methods and the use of fault current contributing devices are presented.

Chapter 5 addresses the operation of distribution systems integrating multiple microgrids at low and medium voltage. A hierarchical system for coordinated Volt/VAR control, black start services and dynamic microgrids equivalents are also covered.

The next chapter summarizes the results from several real-life microgrid projects in Europe, the United States, China and Chile.

The last chapter in the book is an effort to define the technical, economic, environmental and social benefits of microgrids.
Considering the significant differences in the behavior of microgrids compared to the traditional grid under different abnormal conditions and the fact that there is still a lot of work to be done to find the best solutions for their efficient protection and control, this book is a must for the library of any protection, automation and control specialist who wants to be in pace with the development of the smart grids of the future.  

Protecting your electrical assets? today and tomorrow