On the Grounding LC Reactor

Abstract

The author proposes a new method of grounding the neutral of a tran- smission system, namely the use of a condenser in conjunclion with a grounding reactor.
"The grounding LC reactor", as the author suggests to call it, is either of the following.
(a) An iron-core inductance coil with a condenser connected in parallel.
(b) An iron-core coil put in series with a resistance, and then connected in parallel with a condenser.
The advantage of the LC reactor lies in the fact that, a reactor with a slightly saturated core may be safely employed so as to exactly compensate for the capacity current, without causing any appreciable wave distortior, so that the quenching action is ideally effective.
The danger of the so-called series resonance, which is the most serious drawback of Peteren's resonance coil, may be avoided by the use of the LC reactor, for the combination behaves with regard to the series resonance just like a single reactance coil with highly saturated core and a high series resistance.
The underlying principle of this new form of grounding reactor is explained by graphical methods, and some experimental results are described relating to the LC reactor.