1 Copyright © 2012, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Chapter 1 DOI: 10.4018/978-1-61350-138-2.ch001 Nicolay Voropai Energy Systems Institute, Russia Irina Kolosok Energy Systems Institute, Russia Elena Korkina Energy Systems Institute, Russia Alexey Paltsev Energy Systems Institute, Russia Anna Glazunova Energy Systems Institute, Russia Victor Kurbatsky Energy Systems Institute, Russia Nikita Tomin Energy Systems Institute, Russia Alexander Gamm Energy Systems Institute, Russia Irina Golub Energy Systems Institute, Russia Roman Bershansky Energy Systems Institute, Russia Daniil Panasetsky Energy Systems Institute, Russia Dmitry Efmov Energy Systems Institute, Russia Dmitry Popov Energy Systems Institute, Russia Christian Rehtanz University of Dortmund, Germany Ulf Häger University of Dortmund, Germany Coordinated Intelligent Operation and Emergency Control of Electric Power Systems ABSTRACT This chapter presents the following approaches and developments: (1) the approach to power system state estimation based on structural and functional decomposition. PMU measurements are used to coordinate the solutions obtained in individual areas; (2) a non-iterative method to calculate voltage