The electric auxiliary system usually consists of condenser motor loads,and the starting of inductor motors can cause the problem of bus voltage fluctuations.

Through the power flow calculation and theoretical analysis for the electric auxiliary system using reactive power compensation,the economics benefit of the power plant was diseussed,and proved the project is feasible.

The electric auxiliary system sometimes has condenser motor loads,and the sta.

Improvement on treatment of single-phase earth faults in 6 kV station service system;

Novel neutral point treatment for power station service system;

The main protection scheme of longitudinal differential relays collocated in the station service system,including high- voltage station transformer,series reactor,bus,short-distance transmission line,high-voltage alternating motor,etc.

This paper illustrates kinds of automatic transfer mode in auxiliary supply system, and explains the whole transfer period in detail, then concludes the importance and necessity of selecting high speed transfer in auxiliary supply system.

In station, neutral grounding modes of high voltage auxiliary supply system have isolated neutral、 grounding by resistance and grounding by arc- suppression coil, each mode has different excellence and defect.

Through analysis on the ferromagnetic resonance phenomenon in auxiliary power system of the nuclear power station, the possibility of the circuit resonance of the generator voltage is discussed.

Two misoperations may cause generator energization fault:the improper close of generator -transformer circuit breaker and that of auxiliary power transformer branch circuit breaker.