Woodward HighPROtec MCDLV4, Manual, Page: 977 / 1275

Protective Elements
Intertripping (Remote)
Elements:
Intertripping
This module enables intertripping (executing external trip commands)
Application Example
Several Distributed Energy Resources are feeding mains parallel into the grid via one point of common coupling
(PCC).
A mains protection relay is mounted at the point of common coupling. This might be a distance protection relay that
protects the outgoing transmission line.
Let us assume that the outgoing transmission line becomes faulty ❶ .
The feeding Distributed Energy Resources will be disconnected from the outgoing transmission line.
Now the produced electrical energy cannot be fed into the grid.
The element „Intertripping“ provides the option to pass the trip command from the mains protection device to the
feeding distributed energy resource.
The trip decision of the mains protection relay (at the point of common coupling) will be transmitted via Digital Inputs
to the „Intertripping“ elements of the protective devices of the distributed energy resources within the downstream
❷ .
The feeding distributed energy resources will overtake the trip command and the corresponding infeeds will be
disconnected from the mains
❸ . The trip decision of the mains protection device within the upstream will be
overtaken.
977 MCDLV4 DOK-HB-MCDLV4-2E