The pure fault component of zero modulus current can be obtained by subtracting the sampled data of the first cycle zero modulus current before fault from those of the first cycle zero modulus current after fault.

The criterion research of fault component current differential protection with variable vector windows;

Directional current differential protection based on fault components;

Study on the technology which fault line is selected to check fault in distribution network based on the fault component;

Discussion on fault components;

An accurate single terminal fault location algorithm based on fault components for power distribution system;

A new principle of stator single phase to ground fault protection for Powerformer is proposed based on the energy function of the fault components.

directional comparison pilot protection for six-phase transmission lines is presented based on the above mentioned three fault sequence components.