ABSTRACT
A smart grid communication system is comprised of several subsystems. It is eventually a network of networks. A supervisory control and data acquisition (SCADA) system is not only a controlling system but also a communication network in a smart grid. e communication networks in smart grid systems could include dedicated or overlay land mobile radios (LMRs), cellular, microwave, fiberoptic, wired lines such as power line communication (PLC), RS-232/ RS-485 serial links, wireless local-area networks (WLANs) media or a versatile data network combining these media. In this section, we briefly discuss the background of a smart grid system in several aspects: SCADA system, communication networks, deployments of secure smart grid communications, and high-level security requirements. Figure 6.1 shows a typical smart grid communication system.1
