Research and Application of an Evaluation Method for Intrinsic Safety of Power Distribution

The safety evaluation of power distribution is of great importance. Based on the concept of intrinsic safety, two dimensions that affect the intrinsic safety of distribution are proposed herein with the perspective of operation and management in power companies. Two dimensions are "unsafe behavior of human-beings" and "unsafe state of things ". The former includes organization and management, team building, risk control, emergency disposal, and the latter includes physical base guarantee, equipment quality control, hidden trouble identification, technological innovation. Taking the affecting factors of the two dimensions as the first-level indices, thirty second-level indices are constructed. By calculation of the second-level indices, the intrinsic safety evaluation of power distribution can be obtained. The proposed method is utilized to calculate the intrinsic safety of an actual power distribution in a selected city in China. The result shows that the proposed method is capable of comprehensively evaluating the level of intrinsic safety of power distribution, and can provide the clues to find safety enhancements.