Risk Assessment of Urban Distribution Networks Under Extreme Rainstorm Disasters

Aiming at the problem of equipment failure in power distribution rooms under extreme rainstorms, a method for evaluating the probability of equipment failure during rainstorms and a risk assessment index for distribution networks are proposed. Firstly, based on historical data, a flooding model is used to simulate the dynamic process of flooding in cities under extreme rainstorm disasters. Secondly, the fault model of component is used to calculate the distribution equipment failure probability of IEEE 33-bus distribution network during the process. Finally, a hybrid Monte Carlo is used to get the operational status of distribution network and calculate the minimum lost load of the distribution network in order to propose a risk assessment index under this disaster. The method can provide a reference for emergency warning and disaster prevention and mitigation under extreme rainstorm disaster in a particular region.