Book excerpt: All basic knowledge, is provided for practicing Power System Engineers and Electrical, Electronics, Computer science and Automation Engineering students who work or wish to work in the challenging and complex field of Power System Automation. This book specifically aims to narrow the gap created by fast changing technologies impacting on a series of legacy principles related to how Power Systems are conceived and implemented. Key features: - Strong practical oriented approach with strong theoretical backup to project design, development and implementation of Power System Automation. - Exclusively focuses on the rapidly changing control aspect of power system engineering, using swiftly advancing communication technologies with Intelligent Electronic Devices. - Covers the complete chain of Power System Automation components and related equipment. - Explains significantly to understand the commonly used and standard protocols such as IEC 61850, IEC 60870, DNP3, ICCP TASE 2 etc which are viewed as a black box for a significant number of energy engineers. - Provides the reader with an essential understanding of both physical-cyber security and computer networking. - Explores the SCADA communication from conceptualization to realization. - Presents the complexity and operational requirements of the Power System Automation to the ICT professional and presents the same for ICT to the power system engineers. - Is a suitable material for the undergraduate and post graduate students of electrical engineering to learn Power System Automation.