Study on Ferroresonance Elimination in 10kV Power Distribution System With 4TV Method

摘要

Distribution networks can emerge long-time over-voltage due to ferroresonance caused by the electromagnetic voltage transformer saturation under a certain condition, seriously impacting the secure operation of power system. Some distribution networks used 4TV method to restrain ferroresonance and achieved good effects. However, this method performed ineffective in other distribution networks. To solve this problem, the simulation model was established based on ATP-EMTP program. This paper made comprehensive research on the advantages and disadvantages of 4TV method and drew a comparison between connecting ways of 4TV method. It is proved out for electric power department to apply the results from above-mentioned research in practice to improve the power supply reliability of power distribution system.