Elements and methods for risk assessment of an electric power transmission system in terms of their influence on the environment are analyzed in the paper. Kinds and effects of the influence of the system on the ecological, social and technical systems are pointed out. According to the analysis of the elements for the assessment of a transmission system influence on the environment, a suggestion regarding the activities for overall risk assessment is made. Accident and cumulative risk are examined; analytical, statistical and fuzzy risk assessment methods are analyzed.
Key Words: Transmission system, environment, risk assessment, methods for risk assessment