Advanced metering infrastructure (AMI) system proposals promise to improve both the stability and reliability of the electric grid, but with a greater need for enhanced security throughout the architecture. In this paper, a security risk analysis of AMI systems is performed, listing the security assumptions, threat agents, motivations, threats,
vulnerabilities, controls and assets. Specific risks are delineated using qualitative metrics to rank threats so that mitigation and due diligence can be applied both effectively and efficiently

You can access the full article here Risk Analysis for Advanced Metering.