CONCLUSIONS
Manitoba Hydro electrical network experienced kind of
Ferroresonance, which occurs in effect of transformer terminated double circuit transmission line. In this
arrangement, both lines are still energized. Oscillating
behavior of Ferroresonance with chaotic mode causes power
swing in the network; furthermore, increasing voltage, current,
and T.H.D. power swing causes impedance to traverse across
OSB element with certain frequency and blocks operation of
distance relay. Although the value of total current is increased
several times greater than pickup value of overcurrent relay