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This paper proposes a novel equivalence model of the smart grid. The smart grid can be equivalent to a three-layer model, namely power supply, power distribution, and power layer. For equivalent model, the system voltage collapses path are analyzed, the characteristics of the N structure complex smart grid model are derived. The weighted graph model of the brittle relationship of complex smart grid systems is analyzed. The model has the characteristics of logical clarity, hierarchical representation, qualitative analysis. By finding the crash path through different equivalent modes, the crash state path between subsystems can be analyzed. The voltage collapse of one node in the operation of the smart grid system will be transmitted to the entire system through a chain reaction, which will cause the entire system to collapse. The maximum voltage collapse path for different equivalent modes is used to analyze the most likely collapse path. The method of predicting and controlling the brittle voltage collapse path of the smart grid can effectively optimize the performance of the entire system, which has important guiding significance for the design and control of the smart grid.

A Novel Voltage Collapse Path Analysis of Primary System Equivalent Model for Smart Grid