Digital Line Protection System

1
Digital Line Protection System

• Microprocessor Based Protection, Control and
  Monitoring System
• Waveform Sampling
• Proven Protection
• Economical
• Ease of Retrofit

2
DLP-D Enhancements
Three Phase Single Phase Tripping
Continuous Monitor Alarm
2 Shot Recloser Optional
ASCII SUBSET
g Digital Line Protection
GREEN PROTECTION ON RED CHECK STATUS
Proven Design
DLP-C Repackaged
TRIP AC Z1 50
GE PROTECTION AND CONTROL Malvern, PA
MODEL DLP3512CDH Ratings In 5 AMPS Vn 120
Vac Freq 60 Hz GEK 99300
Unbalance Alarm Detection
New Packaging 3 RU High Horizontal or Vertical
SCADA Involved Phases Indication Standard
Carrier Start Options
3
Overview of DLP Operation

• Multiple Microprocessors (3)
• Sampling Rate 16/Cycle

4
DLP Application

• For Three Phase or Single Phase Tripping on any
  Uncompensated Transmission Line
• Typical Operating Times are 3/4 to 1-1/2 Cycle
• 6 Protection Schemes
• Step Distance
• Directional Comparison Blocking
• POTT
• PUTT
• Hybrid
• Zone 1 Extension

5
DLP Operating Times

• SCR Tripping Times
• PT Potential Source

6
DLP Operating Times

• SCR Tripping Times
• CVT Potential Source

7
Settings

• Scheme Selection
• STEP
• POTT
• PUTT
• HYBRID
• BLOCKING (BLK1, BLK2, BLK3)
• ZONE 1 EXTENSION
• Zone 2 Ground Measuring Unit Selection
• Distance
• Directional Overcurrent
• Distance Directional O/C

8
Measuring Functions

• DISTANCE
• Phase Ground
• Zone 1 MHO MHO-or-REACTANCE
• Zone 2 MHO MHO
• (Pilot Zone)
• Zone 3 MHO MHO
• Zone 4 MHO MHO
• (Reversible/Blocking)
• Settable Offset

9
Measuring Functions

• OVERCURRENT
• (3I0 - KTI1) IPT - Pilot Trip
• (3I0 - KBI1) IPB - Pilot Block
• IT - Trip Supervision
• IB - Block Supervision
• FD - Fault Detector
• (3I0 - KDI1) IDT - Inst. Direct Trip
  (Directional Control)
• (3I0) GTOC - Time Overcurrent (Directional
  Control)
• DIRECTIONAL
• NT - Trip
• NB - Block

10
Ground TOC Curves
Inverse
Very Inverse

• Custom Ground TOC Curves From Several Sources
• Curves generated by GEs TOC curve editor
• Any curve from GEs TOC curve database
• The Existing Library of ASPEN RelayEditorTM
  curves
• Any custom curve designed with ASPEN RelayEditorTM

Custom
Extremely Inverse
Definite Time
11
Additional Protective Relay Features

• Out-of-Step Blocking
• PT Fuse Failure
• Line Pickup (Close Into Fault)
• Remote Open Detector
• Line Overload
• Adaptive Reach(Zone 1 Ground Reactance -
  Supervising MHO)
• Current Unbalance Alarm
• Continuous Monitor Alarm Detects Internal Relay
  Changes if FD is Not Picked Up
• Carrier Start Options for Improved Coordination
  in Blocking Schemes with Other Relays.
• Trip Bus Check when Settings are Changed

12
Recloser (Optional)

• Single breaker reclosing
• Programmable up to 2 reclose attempts
• Manual Lockout Panel Switch
• Additional Inputs
• Reclose Initiate, Reclose Inhibit, Reclose
  Cancel, Reclose Reset
• Additional Outputs
• Zone 1 Reach Reset, Lockout Alarm, Reclose in
  Progress

13
Inputs - Single Phase Models

• IA, IB, IC
• VAG, VBG, VCG
• RI-1P
• RI-3P
• Receiver 1 Output Contact
• Receiver 2 Output Contact
• Stop Carrier
• Block Pilot Tripping
• (3) 52/b Contacts (w/ Recloser)
• (3) 52/b Contacts (w/o Recloser)
• Reclose Inhibit
• Reclose Cancel
• Reclose Reset
• 3 Pole Trip Enable
• Configurable Inputs

14
Inputs - Three Phase Models

• IA, IB, IC
• VAG, VBG, VCG
• (6) Digital Inputs (Contact Converters)
• (2) 52/b Contacts
• Receiver 1 Output Contact
• Receiver 2 Output Contact
• Stop Carrier
• Block Pilot Tripping
• RI
• Reclose Inhibit
• Reclose Cancel
• Reclose Reset
• Configurable Inputs
• Inputs for Recloser

15
Configurable Inputs

• (1701)
• CONCCI CC4 CC5 CC6
• 0 RECEIVER 2 SELECT GROUP BIT 1 SELECT GROUP
  BIT 0
• 1 EXTERNAL TRIGGER SELECT GROUP BIT 1 SELECT
  GROUP BIT 0
• 2 CONFIG. INPUT 1 SELECT GROUP BIT 1 SELECT
  GROUP BIT 0
• 3 RECEIVER 2 STOP CARRIER BLOCK PILOT TRIP
• 4 EXTERNAL TRIGGER STOP CARRIER BLOCK PILOT
  TRIP
• 5 CONFIG. INPUT 1 STOP CARRIER BLOCK PILOT
  TRIP
• 6 RECEIVER 2 CONFIG. INPUT 2 CONFIG. INPUT
  3
• 7 EXTERNAL TRIGGER CONFIG. INPUT 2 CONFIG.
  INPUT 3
• 8 CONFIG. INPUT 1 CONFIG. INPUT 2 CONFIG.
  INPUT 3

SELECT SETTINGS GROUP
DEFAULT
USER INPUT
16
Configurable Inputs / Adaptive Settings
Settings CC5 CC6 Group 0 0 G1
0 1 G2 1 0 G3 1 1 G4
SETTINGS GROUP SWITCH 16SB1______
CONTACT NUMBER G4 G3 G2 G1
1 X X 2 3 X
X 4
1
2
3
4
SETTINGS GROUP
G1
G2
G4
G3
17
Outputs - Single Phase Models

• DEDICATED
• Trip (SCR or Contact, 2 per phase)..... 6
• BFI (2 per phase).................................
  .. 6
• RI-1P.............................................
  ......... 2
• Transmitter Key...................................
  . 2
• Zone 1 Extension Reset....................... 1
• 3 Pole Trip Enable................................
  1
• Reclose in Progress............................. 1
  
• Alarm (Pwr Supply/Critical)................. 1
• SCADA.............................................
  ..... 5
• CONFIGURABLE
• RI-3P (Configurable as pair)................ 2
• BKR Close
• (Independent - Except Reclosing)...... 2
• Line Overload.....................................
  .. 1
• Non-Critical Alarm................................
  1
• Reclose Cancel....................................
  . 1

18
Outputs - Three Phase Models

• DEDICATED
• Trip (SCR or Contact)........................... 2
  
• BFI...............................................
  ........... 2
• Transmitter Key...................................
  . 2
• Alarm (Pwr Supply/Critical)................. 1
• SCADA.............................................
  ...... 5
• Reclose in Progress
• (recloser models only)......................... 1
• Lockout Alarm Reach Reset
• (recloser models only)......................... 2
• CONFIGURABLE
• RI................................................
  ............ 2
• BKR Close (Independent).................... 2
• Line Overload.....................................
  .. 1
• Non-Critical Alarm................................
  1
• Reclose Cancel....................................
  . 1

19
Configurable Outputs

• EXAMPLE
• Configure the BC-1 Output to Close when Zone 1
  BG, GRD DIR TRIP, and CONF. INPUT 1 are ON and
  CONF. INPUT 3 is OFF.
• (1801) CONOUT 1 2 (AND gate)
• (1802) CO1 IN1 2 (Z1BG)
• (1803) CO1 IN2 35 (GRD DIR TRIP)
• (1804) CO1 IN3 50 (CONF. INPUT 1)
• (1805) CO1 IN4 152 (NOT of CONF. INPUT 3)
• (1806) CO1 IN5 0
• . .
• . .
• (1809) CO1 IN8 0

20
SCADA Digital to Analog Interface

• Provides Analog Output Proportional to Distance
  to Fault Location in 0 to 1mA DC or 0 to 5 Vdc
  Output (Selectable)
• Four (4) Contact Outputs Provide Fault
  TypeExample

A B C G
Phase A to Neutral Fault Indication
21
TRIP AB Z1 44

• Target (Current Actuated)
• Fault Location
• Algorithm Lumped Parameter Differential
  Equation Solution
• Uses Phasor Quantities (Output of Fourier
  Algorithm) as Inputs
• Eliminates the Effect of Fault Resistance

22
Present Value Reporting

• Voltages
• Watts
• Phase Angles

• Currents
• Vars
• Breaker Status

Automatically Displayed and Updated In Four
Second Intervals on LED Display
23
Communications

• Local MMI (Standard)
• 2 Level Password Protection
• MASTER
• SETTINGS
• 16 LED Alphanumeric Display
• Keypad with 20 Keys
• Separate Function Keys for
• Settings
• Action
• Information
• Alarms
• Status LED

24
Communications
- DLP
COMMUNICATIONS 2.80

• Remote Access
• Via RS232 DLP-LINK Software
• Front and Rear RS232 Ports
• 3 Level Password Protection
• Access to
• Present Values
• Fault Report
• Sequence of Events
• Oscillography
• Manual Breaker Control
• Relay Settings

Local Functions Setup Help
Relay Functions
Logout Change access level Hang up
phone Actions . . . Information . . .
Settings . . .
Login
Phone disconnected
25
Remote Access - Rear ASCII Port
ASCII PORT HELP SCREEN STATION MALVERN LINE
LINE 1 UNIT ID 0 DATE
08/24/96 TIME 105751 STATUS - Request
DLP Status VALUES - Request Present
Values MODEL - Request PROM and MODEL
numbers EVENTS - Request event report SHOWSET -
Request setting group information STLINID -
Request station and line ID FAULT - Request
fault report FSTATUS - Request status of all
faults LOGIN - Login request LOGOUT - Logout
request
STATION MALVERN LINE LINE 1 UNIT ID
0 DATE 08/24/96 TIME 105751
MODEL NUMBER
DLP3512CDH PROM
VERSION NUMBER V002.320B
INFORMATION ONLY
26
Fault Report
Sample DLP
5512
FAULT REPORT Station ID PLACE
TRANSMISSION Line ID CREEK 115KV OCB 5512
TRIP DATE 09/11/95 TRIP TIME
151610.295 FAULT TYPE AB
DISTANCE MILES TRIP TYPE Z4
OPERATING TIME 01496
PREFAULT FAULT
Ia 038.40 A Ia
057.60 A Ib 028.80 A
Ib 048.00 A Ic 057.60 A
Ic 050.40 A In
007.20 A In 014.40 A

Va 066.0 KV
Vb 066.0 KV
Vc 066.1
KV 151610.295 TRIP SIGNALS ON 151612.119
TRIP SIGNALS RESET 151612.119 TRIP CIRCUIT 1
NOT ENERGIZED

• Prefault
• Currents
• Voltages
• Post Fault
• Currents
• Voltages
• Trip Targets
• Operating Time
• Selected Events

27
Present Values

• Currents
• Voltages
• Angles
• Watts
• Vars
• Breaker Status
• Carrier Status
• Active Setting Group

Sample DLP
5072
PRESENT VALUES Station ID
CREEK TRANSMISSION Line ID 115KV OCB
09/18/95 142344.455
IA 001.16 A -001 DEGS VA 066.3
V 000 DEGS IB 001.26 A 119 DEGS
VB 066.3 V 121 DEGS IC 001.26
A -119 DEGS VC 066.3 V -119
DEGS IN 000.03 A DEGS
WATTS 056.6 MW VARS
003.1 MVAR BREAKER 1 CLOSED
BREAKER 2 N/A PLC 1 SIGNAL OFF
PLC 2 SIGNAL OFF PLC 1
STATUS N/A PLC 2 STATUS
N/A STOP CARRIER OFF
SETTING GROUP NUMBER 1 BLOCK PILOT TRIP
OFF
28
Sequence of Events
Sample DLP
5072
Events Station ID CREEK
TRANSMISSION Line ID 115KV OCB 07/25/95
190621.121 TRIP SIGNALS RESET 07/25/95
190621.121 TRIP CIRCUIT 1 NOT
ENERGIZED 07/25/95 190621.048 TRIP SIGNALS
ON 07/25/95 190621.038 OSC TRIGGER 05/31/95
121642.091 TRIP CIRCUIT 1 MONITOR ALARM
ON 05/31/95 121641.915 TRIP CIRCUIT 1 MONITOR
ALARM ON 05/31/95 121641.879 REMOTE COMM -
SETTINGS CHANGE DONE 05/31/95 121630.720
REMOTE COMM - SETTINGS CHANGE STARTED 05/31/95
121348.392 REMOTE COMM - PASSWORD
CHANGED 05/31/95 121153.383 REMOTE COMM -
PASSWORD CHANGED 05/31/95 121037.847
UNBALANCED SYSTEM DETECTION ALARM ON 05/31/95
121029.930 REMOTE COMM - PASSWORD
CHANGED 05/31/95 120935.302 FUSE FAILURE ALARM
ON 05/31/95 120935.175 LOCAL - SETTINGS CHANGE
DONE 05/31/95 120930.826 LOCAL - SETTINGS
CHANGE STARTED 05/31/95 120722.109 UNBALANCED
SYSTEM DETECTION ALARM ON 05/31/95 120600.042
FUSE FAILURE ALARM ON 05/31/95 120600.000 SSP
BOARD QUEUES REINITIALIZED 05/31/95 120530.210
FAIL - TRIP BUS CHECK 05/31/95 120530.177
FUSE FAILURE ALARM ON

• Operational Events
• Setting Changes
• Fault Data
• Status
• Diagnostic Self-Test Events
• Warning (Non-Critical Alarm)
• Failure (Critical Alarm)
• Time Tagged to 1ms Resolution
• Last 100 Events Stored

29
Oscillography Triggers

• None
• Fault Detector
• Any Zone 2
• Any Zone 3
• Any Zone 4
• Out-of-Step
• V1 Detector
• External Contact Input

30
Flexible Oscillography Data Storage

• Faults Stored Cycles
• 2 72
• 4 36
• 7 18
• 14 9
• Pre-fault Cycles Selectable from 1 to 8
• Settings and Fault Report are stored with
  Oscillography Data

31
Oscillography Data

• Internal and External Oscillography Triggering
• ASCII File Format(Readable by EXCEL/LOTUS/DL-DATA
  )
• For Each Sample
• 4 Currents (IA, IB, IC, IN)
• 3 Voltages (VA, VB, VC)
• 6 Flag Groups
• Digital Inputs
• Outputs
• Phase Zone Flags
• Breaker Status and Gnd. Zone Flags
• Protection Logical Input Flags
• Output Status of Protection Timers

32
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33
Hardware and Packaging

• Draw-Out Modular Construction with Removable Door
• Front Panel Power Switch
• Information Access
• MMI
• RS232 Front Rear (GE Modem)
• RS232 Rear (ASCII)
• Target Clearing Through Door
• Optional Mounting Flanges for L2 and KD cutouts
  and Moveable Mounting Brackets
• Self-Test Diagnostics
• Critical Alarm
• Non-Critical Alarm

34
Hardware and Packaging

• Magnetics are easily accessible, but not part of
  Drawout Assembly
• Improves reliably by eliminating CT shorting bars

35
Nomenclature Selection Guide

• DLP
• 1 1 AMP Rated
• 5 5 AMP Rated
• 0 48 Vdc Battery Voltage
• 1 110/125 Vdc Battery Voltage
• 2 220/250 Vdc Battery Voltage
• 1 SCR Tripping Output
• 2 Relay Tripping Output
• 3 C Three Phase Tripping, Without
  Recloser
• 1 J Single Phase Tripping, Without
  Recloser
• 1 K Single Phase Tripping, With Recloser
• 3 K Three Phase Tripping, With Recloser
• D Revision Level
• H Horizontal Mounting
• V Vertical Mounting