ABB RELION REX640, Техническое руководство, Страница: 1404 / 1960

7.5.2 Function block
Figure 795: Function block
7.5.3 Functionality
The Diesel generator monitoring and protection DGMGAPC function protects
industrial power plants and vessels from faults which are not easily detected by
normal protection functions. The most important of such faults are the over/under
fueling of diesel engines and over/under excitation of generators.
DGMGAPC protects the generators in isochronous load sharing, droop load sharing
and base load modes. The function performs topology determination to identify the
components connected in its own electrical network and exchanges relevant data
with all other relays having DGMGAPC function and present in the same IEC61850
network.
The DGMGAPC identifies a fault in the generator by comparing its behavior to its
current governor mode or with reference to other generators in the network. When a
fault is detected, the function will signal the fault to the Power Management System
(PMS). If the fault condition deteriorates, the function issues commands to stop the
engine or to de-excite the generator. It then issues a trip command to the Generator
Circuit Breaker (GCB).
Condition monitoring functions 1MRS759142 F
1404 REX640
Technical Manual