DISTRIBUTED GENERATION EFFECTS ON PROTECTIVE RELAYING
APPLICATIONS
INNOVATIVE PROTECTION FEATURES
Microprocessor Based Programmable Protection Systems Inputs, Outputs and Operator Controls
Digital relay-relay communications
Disturbance data capturing and sequential event reporting
INPUTS AND OUTPUTS
Inputs Provide Protection System and Equipment Status
Outputs Provide Interconnection Functionality Trip and close control
Inadvertent utility energization interlocks
PROGRAMMABLE OPERATOR CONTROLS
Interconnection Control Functionality can be Easily Changed via Operator Control Programming
DIGITAL RELAY-RELAY COMMUNICATIONS
Enables Advanced Feeder/Distributed Generation Control Direct transfer trip initiated from feeder
recloser
Distributed generation control based on feeder recloser loading
Distributed generation status provided to feeder recloser
SEL MIRRORED BITS Communications
µ W ave
.....
..... .....
.....
R elay 1
D B9 C onnectors
AudioR adio
O ther
. . .
. . .
FiberSEL-28xx
R elay 2
Fiber
SEL-28xx
O ther
Transmit “Mirrored” to ReceiveR elay 1 R elay 2
TRANSMIT
RECEIVE
TRANSMIT
RECEIVE
TM B1
TM B2...
TM B8
RM B1
RM B2...
RM B8
TM B1
TM B2...
TM B8
RM B1
RM B2...
RM B8
1
0...0
0
0...0
0
0...0
1
0...0
Recloser to DG UnitMIRRORED BIT Communication
R elay 1-Feeder R ecloser R elay 2 - D G In terconnect
TRANSMIT
RECEIVE
TRANSMIT
RECEIVE
Load O K to G enerate
DTT...
TM B8
DG O ff L ine
...RM B8
DG O ff L ine
52A STATUS...
TM B8
...RM B8
1
0...0
0
0...0
0
0...0
1
0...0
52A STATUS
Load O K to G enerate
DTT
CONCLUSIONS
Programmable Protection Systems will Provide Flexibility for Future Distributed Generation Control
Digital Relay-Relay Communications will Enable Feeder Control of Distributed Generation
Programmable Operator Controls will Allow Routine Functionality Changes via Front Panel Push Button Control
Interconnection System Enhanced by Programmable Output