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Reverse action of on-load tap changer in association with voltage collapse

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3 Author(s)
Ohtsuki, H. ; Kansai Electr. Power Co., Osaka, Japan ; Yokoyama, A. ; Sekine, Y.

A discussion is presented of the reverse action that occurs when the secondary voltage of a transformer is pulled down and the tap position of an on-load tap changer is raised to increase the secondary voltage. A dynamic model of an induction motor is adopted as a load model simulating this kind of reverse action during voltage collapse. The transient mechanisms of the reverse action are analyzed using P -V curves. It is found that the reverse action caused by on-load tap changers may cause the operating condition to deteriorate in a heavily loaded power system where cascaded voltage collapse may occur

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Power Systems, IEEE Transactions on  (Volume:6 ,  Issue: 1 )