Summary

A home area network (HAN) in smart grid systems is a premises network.. Unlike the traditional HAN, the HAN in smart grids includes smart grid devices, such as distributed energy resources (DERs), an electric vehicle (EV) charger, a home energy management system (HEMS) and a customer energy display (CED). Customer electricity loads and DERs are connected to the HAN, so that customers can turn the loads and DERs on or off based on the information from the utility in order to maximize the efficiency of electricity usage. A HAN is usually connected to the Internet, so attackers can easily access to a HAN and HAN devices. Thus, HAN devices should provide capabilities that prevent attackers from compromising the HAN and its devices. Recommendation ITU-T X.1331 provides threat analysis for a HAN in smart grid systems, security requirements and security functions. Since the role and functions of each HAN device are different, the security requirements and security functions by device are provided.