Risk Assessment Methods for Urban Power Grids under Extreme Weather

As the core component of modern urban lifeline system, the safe operation of urban power grid is of strategic significance to guarantee the social and economic development. The traditional risk assessment method only targets a single meteorological disaster and lacks the analysis of the defense capability of urban power grid. Based on this, this paper proposes a hierarchical analysis-based assessment model of urban power grid's disaster-resistant capability and a Bayesian network-based natural disaster severity assessment model to construct a risk assessment system for urban power grids under extreme weather, and combines the fuzzy theory with the fuzzy comprehensive evaluation model, and finally, according to the proposed method, the data of actual equipment and facilities of a certain power supply grid and data of historical cases of extreme weather disaster are analyzed in terms of the arithmetic cases, and the feasibility of this method is verified. Finally, based on the proposed method, an example analysis is carried out on the actual equipment and facilities data of a power supply grid and the historical data of extreme weather damage, which verifies the feasibility of the method.