For highly compensated EHV line, eg 500 kV line, it is well known that neutral reactor is required on the shunt reactor in order to neutralise the effects of the capacitive couplings between the faulty phase and two healthy phases so that high speed single phase auto reclosing scheme would work.
Normally, the size of the neutral reactor is in the 10th to 100th ohm for reactive compensation ratio above 0.8. In this application, the required size of the neutral reactor is in the 10 of thousand ohm. In fact it is better to have the neutral floated as this results in smallest secondary arc current and recovery voltage.
My questions :
Does any one has experience in installing ungrounded shunt reactor in order to achieve higher chance of successful single phase autoreclose at the expense of significant cost increase for insulation of the shunt reactor ?
Any issues with regards to operating ungrounded shunt reactor ?
Any advantage of installing delta connected shunt reactor instead ?
However, for low
Sizing of Neutral Reactor for EHV Line Connected Shunt Reactors
Re: Sizing of Neutral Reactor for EHV Line Connected Shunt Reactors
