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7.3 Medium voltage ring network
protection
7 Applications
Technical description
238
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VM259.EN007
7.3.
Medium voltage ring network
protection
With distance and linedifferential protection relays the
protected area of each relay can be set up specifically thus
giving optimal solutions into ring network protection. Also the
power generation in the protected areas does not cause troubles
in the protection scheme and the operating times of the set
zones. All of the fault situations can be cleared with minimum
operating time.
Figure 7.3-1 VAMP Line protection devices used in ring network feeders
with distributed generation.
By using distance and linedifferential relays the back-up
protection in the ring network can also be set to very fast and
precise operation.