In the local areas of Xinjiang Power Grid

the increase of 220 kV coal power plants

complicated grid structure and increase of line load have made the short-circuit current exceed the interruption ability of circuit breakers.Therefore

the control of short circuit current exceeds the standard has become a hot topic researched by power grid companies and research institutes. In view of this issue

the principle of FCL device based on fast vacuum circuit breaker is analyzed firstly in this paper;then

the steady and transient simulation model for two sets of FCL devices based on fast vacuum circuit breaker（VCB）

which are installed at one 220 k V power plant in Xinjiang

are set up.The steady short circuit current

the opening and closed operating over-voltage of the fast circuit breaker and its transient recovery voltage are calculated. The calculation result shows that the FCL device can not only limit effectively short circuit current

but also not cause any danger to the system and equipment. Finally

the performance verification test of the FCL is performed at site. The result shows that the FCL device can be able to operate quickly and correctly and such target of the grid fault current limiter as portable structure

low cost

reliable operation and convenient maintenance has been achieved. However

the disadvantage is that there is no artificial short circuit grounding on site

the system has not been short circuit grounding and no actual measurement data is available

which have a definite regrets.