ABSTRACT
Smart Grid technologies enhance the efficiency, operation and reliability of the existing power system network. The bidirectional flow of energy and information increases the dependency of the smart grid on cyber resources, thereby making them vulnerable to different cyber threats. These threats may be as small as tripping of circuits or as big as the complete blackout of the grid. The protection and management of different components of the smart grid have become a must for the healthy operation of the grid. The proposed book chapter discusses the architecture of the smart grid, different threats on the network and solutions in detail. This chapter is divided into three parts. The first part discusses the details of the two basic architectures of the smart grid: Physical Layer (PL) and Cyber Layer (CL). In the second part, the security concerns in the PL of the smart grid are addressed. It is further analysed to determine the possible solutions for tackling the threat. The last part focuses on the cyber concerns and solutions of the CL. The attacker compromises the sensors and smart meters by injecting false data, leading to faulty or fatal operations. The revenue losses from sensor data manipulation as well as online electric theft are also discussed in the chapter. To avoid/mitigate these cyber intrusions, different techniques and suitable security solutions are detailed.
