Study on model for multi-circuit lines with zero-sequence mutual impedances in power system fault calculation;

Comparison of fault calculation methods for transmission network considering unsymmetrical two-phase railway power supply system;

A practical improvement of complex fault calculation based on canonical algorithm in power system;

The frequent pattern, the correlation or causal relationship between classification properties and decision-making properties were founded from fault data, the correlation property of power system fault elements was grasped on macro view.

Rapid fault information synthesis, analysis and diagnosis with high speed transmission to dispatch center, when a power network fault takes place, play important roles in time decreasing of data collection, fault decision and correct adjustment of power system.

Based on rough set theory,this paper analyses the data of power network faults and set up a decision table,and then uses the information entropy algorithm in conditional attributes reduction to gain a reductional system.

The paper introduces two electric power network faults caused by the break breakdown of circuit breaker(CB).

At present, the symmetrical components method proposed by Fortescue in 1918 still take the leading position in the field of power system fault analysis.