Saturable reactor

Saturable reactor

Series Saturable Reactor Design

Published in Colonel Wm. T. McLyman, Transformer and Inductor Design Handbook, 2017

The saturable reactor is a magnetic device that had great popularity in 1950 and 1960, but when the transistor and silicon controlled rectifier came along, the saturable reactor nearly fell out of sight. The saturable reactor is still being used in motor control, power supplies and current transducers. It is also rugged and provides good electrical isolation between input and output.

Elimination of Chaotic Ferroresonant Oscillations Originated from TCSC in the Capacitor Voltage Transformer

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Journal Information

Published in IETE Journal of Research, 2018

Ataollah Abbasi, Seyed Hamid Fathi, Amin Mihankhah

Under normal operation, the FSC provides a constant burden of Rr. A salient feature of a CVT equipped with this kind of FSC is its flat frequency response up to several 100 Hz [45]. To the contrary, the CVTs with tuned RLC filter based ferroresonance protection circuit do not exhibit flat frequency response up to several 100 Hz [50–52]. Researches show that ferroresonance suppression resistor inductor (RL) circuit with saturable reactor has little effect on transients. The reactor current is negligible unless the ferroresonance is present, so the only FSC component affecting the transient suppression RL circuit, with reactor, is used, and the CVT transient response to a primary voltage collapse is less distorted. These results are smaller than distance relay overreach [51]. It should be mentioned that G1 and G2 represent either a spark-gap with breakdown voltage or a semiconductor switch which is triggered at a voltage level such as triac. Before discussing ferroresonance in the TCSC, brief description about TCSC will be given [45].

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Series Saturable Reactor Design

Elimination of Chaotic Ferroresonant Oscillations Originated from TCSC in the Capacitor Voltage Transformer