This book offers a unique reference-guide to magnetically controlled shunt reactors. In particular, it focuses on simulating and estimating the efficiency of the application of controlled shunt reactors with different operating principles and design. It offers extensive details on computer simulation and related automatic control systems, and reports on practical case studies. This book, which is based on practical investigations performed by the authors at the Department of Electrical Systems and Networks of Peter the Great St. Petersburg Polytechnic University, offers the first comprehensive guide to the operation and design of magnetically controlled shunt reactors. It addresses both researchers and engineers in the field of power systems.