A Method of Generating Group Fault Sets Automatically Taking into Account of Spatial-Electrical Coupling Characteristics

Taking into account the external natural disaster probability and the space and electrical coupling characteristics between electrical equipment, a combined probability calculation method of group failure and sequential failure under natural conditions is proposed. And a multi-dimensional failure based on grid structure vulnerability, grid state vulnerability and grid accident risk is proposed. Consequence evaluation method provides a basis for effectively screening high-risk expected failure sets; constructs a disaster-problem equipment failure probability state tree model, uses the multiplicity of failures, combined probability threshold, and multi-dimensional failure consequence evaluation indicators as constraints, and uses a backtracking algorithm to achieve natural disasters. The high-risk prediction sets are quickly generated to ensure that small-probability and high-risk faults are included in the calculation, and the real-time and targeted nature of power grid safety analysis and control is improved. The simulation analysis of an actual power grid online example verifies the effectiveness and practicability of the method.