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By means of the lightning tripout data from electricity department and the cloudtoground lightning data obtained by the lightning position network from the Zhejiang Meteorological Service, the spatial and temporal distributions of electric power tripout events from 2007 to 2011 in Zhejiang Province are analyzed. The distances between tripout events and cloudtoground lightning and the relationship between the parameters of cloudtoground lightning data and the voltage classes of lightninginducing tripout events are analyzed. The results show that diurnal and monthly variation of lightning tripout events and cloudtoground lightning exhibit a singlepeak structure, and the correlation coefficients are 0.9905 and 0.9881, respectively. However, their spatial distributions are not significantly correlated. The lightning current intensity inducing tripout events of 110 kV, 220 kV, and 500 kV power lines is below 90 kA in most cases, and the current intensity inducing the tripout of 500 kV line is relatively lower. The distances between cloudtoground lightning and tripout tower are less than 2 km, so are the nearest distances between cloudtoground lightning and transmission lines.