Abstract

The heterogeneous characteristics of the components of complex power grids in terms of operating conditions, grid structure, status, etc., will play a negative role in fuel grid cascading failures, thus posing a serious threat to grid security. This paper analyzes the heterogeneity of complex power grids in terms of tidal current operation, mainly as the trend distribution curve exhibits exponential and power-law characteristics in semi-logarithmic and double-log curves. Based on the Lorentz curve and the Gini coefficient concept in economics, it is proposed that the Gini coefficient can be used as a characterization index for the heterogeneity of tidal current distribution.

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