This book reports on the latest findings in the application ofthe wide area measurement systems (WAMS) in the analysis and control of powersystems. The book collects new research ideas and achievements including adelay-dependent robust design method, a wide area robust coordination strategy,a hybrid assessment and choice method for wide area signals, a free-weightingmatrices method and its application, as well as the online identificationmethods for low-frequency oscillations. The main original research results ofthis book are a comprehensive summary of the authors’ latest six-year study.The book will be of interest to academic researchers, R&D engineers andgraduate students in power systems who wish to learn the core principles,methods, algorithms, and applications of the WAMS.