For system reliability improvement, immediate isolation of a fault point
and immediate power restoration is very important in case of fault occurrence.
For thus purpose, "Distribution Network Improvement" and "Distribution
Network Planning" are absolutely required.
Distribution network improvement makes an effective use of distribution
network and avoidance of planned outage, thus , system reliability will be
most certainly improved. Moreover, in the case that the same voltage level
distribution system uses various many voltage types, voltage standardization
should be required for distribution network improvement as well .
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