To solve the problem of locating single-phase grounding fault section of 10 kV feeders in power distribution system,this paper presents a virtual value method based on zero-sequence current of sections.

The paper Presents the principle of selective leakage protection based on zero sequence current direction.

This paper analyzes the basic principle of Sel587 differential protection device and elaborates the influence of zero sequence current .

In order to reduce influences of varieties of operation conditions of power systems and differences of grounded fault type on the protecting range of the instantaneous zero sequence current protections of transmission lines,a feasible method for realizing the adaptive instantaneous zero sequence current protections was put forward.

A phase shift converter can achieve zero voltage switching on the leading leg and zero current switching on the trailing leg by utilizing the reverse avalanche characteristics of IGBT.

A restrictive condition for zero current experimental technology to choose different experimental technology to choose different components ,parameters is discussed in the article.

Novel asymmetrical half-bridge ZCS arc welding inverter power;

Research of ZVS-ZCS PWM Soft Switch;

High-Power Asymmetrical Half-bridge ZCS Quasi-Resonant Converter;