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While electric interconnections have had different kinds and levels of intelligence in them for many decades, in the last 6 years the notion of the “smart grid” has come seemingly out of nowhere to be on the minds of not just power engineers but policy makers, regulators, rate commissions, and the general public. Inherent in the notion of the smart grid is the ability to communicate much more sensor data and have far more computations at many more locations using these data. The purpose of this book is to give power engineers, information technology workers in the electric sector, and others a snapshot of the state of the art and practice today as well as a peek into the future regarding the smart grid. There is a special focus on new kinds of communications and computations enabled or necessitated by the smart grid.

Proportional Integral (PI) and Proportional Integral Derivative (PID) controllers have been at the heart of control engineering practice for seven decades. However, inspite of this, the PID controller has not received much attention from the academic research community until the past fifteen years, when work by K.J.Astrom, T.Hagglundand F.G. Shinskey, among others, has sparked a revival of interest in the use of this "workhorse" of controller implementation. 

Published in 2010, this book is very necessary for someone who wanna study about electromagnetic. If you are those people, lets download and read it. :)