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Overview

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Overview & Application Of Digital Relays Craig G. Wester General Electric Author: GE-Multilin Last modified by: John Levine Created Date: 5/19/1996 11:59:04 AM – PowerPoint PPT presentation

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Title: Overview


1
Overview of Digital Relays
ISO Training John S. Levine, P.E. Levine
Lectronics Lectric John_at_L-3.com www.L-3.com
2
ISO Training July 22, 2008Outline
  • Introduction
  • Overview of Digital Relays
  • Tools
  • Enervista Launchpad
  • PowerPoint presentations at
  • GE Digital Relays
  • Protection Basics
  • SR489
  • GE Multilin G30 Training
  • Post Glover NGR Training
  • ANSI Symbols handout
  • Conversion of Electro-Mechanical to Electronic
    sheet
  • GE Multilin Training CDs

3
Trends
  • 75 of Installed Base of Relays are
    Electromechanical
  • 90 of New Relays Purchased are
    Digital/Electronic
  • Lingering Issue of Putting All Eggs In One
    Basket
  • No Backup
  • Like to See Disk Move
  • Solve with Backup (such as DIAC as backup to
    SR760 or F60)
  • Gain Excellent Accuracy and No Setting Drift
  • Manufacturers have Created Relay Families, thus
    reducing maintenance, OM costs and training.

4
Microprocessor-Relay Benefits
  • Multi-Function Protection Cost Effectiveness
  • Configurable/Programmable Logic
  • User Configurable Time Current Curves
  • Self-Testing of Relays Algorithms with Alarm
    Contact
  • Reduce Periodic Testing
  • Every 1-2 years for Electromechanical
  • Every 5-10 years for Digital (or More!)
  • Improved System Data
  • Fault Location Reporting - Waveform Capturing
  • Internal Operation Data - Metering
  • Breaker Health Monitoring - Demand Interval
    Records
  • Sequence of Event Reporting

5
Microprocessor-Relay Benefits
  • Flexible Settings
  • Multiple Setting Levels
  • Communication Capabilities
  • Local via Keypad
  • Remote via Computer and Modem
  • Networks can be created
  • Reduced Panel Space Wiring
  • Compact Packaging
  • Tested at Factory
  • Eliminate Component Panel Metering

6
Digital Relays - Areas Of Use
  • Distribution Feeder Protection
  • Reclosing
  • Down Conductor Detection
  • Breaker Failure Protection
  • Generator Protection
  • Transmission Line Protection
  • Transformer Protection
  • Bus Protection
  • Motor Protection

7
NEW
OLD
8
Programmability
  • Digital Relays Have
  • Programmable Inputs
  • Programmable Outputs (ALARM TRIP)
  • Programmable Logic
  • Boolean Logic - AND, OR, NOT Logic
  • Programmable Time Current Curves

9
Waveform Capturing Including Bar Plotting of
Unit Operation
10
Metering
  • 0.25 - 5 Accuracy on I V
  • Typical Values
  • Can Be Accessed Locally or Remotely
  • Some Relays Have Analog Outputs Proportional to
    Metering Values (i.e. 0-1mA)
  • Current
  • Voltage
  • Watts, Vars, PF
  • Frequency
  • kWh, kVarh
  • Phase Angles
  • Min Max Values with Date Time Stamp
  • Harmonic Values of I
  • Symmetrical Components
  • Operation Counters
  • Breaker Position

11
Metering
12
Other Monitoring
  • Breaker Health Monitoring
  • Cumulative I2T or IT
  • Activate Alarm At Set Level
  • Demand Interval Reporting
  • 15, 30, 60 Minute Intervals over Several Days
  • I, Watts, Vars, VA, PF
  • Peak Values Recorded
  • Date Time Stamped
  • Trip Close Coil Monitor
  • Fault Location Fault Reporting

13
Sequence Of Events Recording
  • Events Stored with Date Time
  • Alarms
  • Contact Operations
  • Logins Logouts
  • Waveform Captures
  • Remote Operations
  • Resets
  • Setting Changes
  • Last 100-1000 Events Stored

14
Settings
  • Easier Than Electromechanical/Static
  • Flexible settings
  • Relays Have Multiple Setting Groups
  • Can be Switched with Input Contacts or Remotely
  • Settings Are Stored in Files and Down Loaded to
    Relay with PC
  • Easy to Copy Existing Setting Files and Modify
  • Accurate Implementation of Settings
  • No Overtravel
  • No Large Drifts in Set Points
  • Selection of Reset Times
  • Fast (Digital) or Slow (Electromechanical)

15
Local Communications
  • Thru Keypad, Up, Down Arrows, Enter/Select Keys
    or RS232 Port on Relay
  • Local LED Display
  • Reset Key/Button
  • LED Targets
  • Password Protection

Phase TOC1 OP
DN
ENTER
UP
16
Communications
17
Remote Communications
  • Thru Rear RS232 or RS485 Port Using Standard
    Modem Software or Relay Manufacturers
    Communication Software
  • Password Protection
  • 10Mbps Ethernet Connections - Wire or Fiber
  • Multiple Protocol Support (DNP3.0, Modbus RTU,
    Devicenet, Profibus, and IEC 61850)

18
Substation Communications - LAN WAN
19
Communications
20
Memory Map Example
  • Group Address Description
  • Current 0300 Phase A Current
  • 0301 Phase B
    Current
  • 0302 Phase C
    Current
  • 030D Phase A
    Differential
  • 030E Phase B
    Differential
  • 030F Phase C
    Differential

21
Available Control by Digital Relaysvia
Communications Protocols
  • Reset Data
  • Min/Max, Demand, etc.
  • Reset Targets
  • Operate Output Contacts
  • Trip Close
  • Trigger Waveform Capture
  • Set Date Time
  • Force Input Contact Operation
  • Block Relay Functions
  • Perform Setting Changes

22
Maintenance Benefits
  • Self-Test Capabilities
  • Remote Communications
  • Easy Setting Changes
  • One Model Could Be Used for Several Applications
  • No Setting Drift of Digital Relay
  • Reduced Wiring
  • Flash Memory
  • Upgradeable Firmware

23
Todays Feeder and Transformer Digital Relays
24
DIAC,DIFC,DSFC Single Phase Overcurrent
Protection
  • Digital Overcurrent Relay Platform w/ True RMS
    Overcurrent Measurement (50/51)
  • Replace IAC, IFC and SFC relays. . .
  • Self Powered (no DC Battery Required)
  • Same case size, no metal modifications
  • Simply add surge ground lead
  • User Selection of 16 curve characteristics
  • Exact Duplication of IAC51, IAC53 IAC77
    Characteristics
  • Instantaneous Overcurrent Delay Setting
  • Reset Characteristic Selection (Fast or E/M)
  • Draw-out Case with Test Facilities
  • Retrofit existing IAC, IFC and SFC Cases
  • Very Low Burden (1.8VA)
  • No Communications

25
SR760 - Feeder Protection
  • 16 Samples/Cycle
  • 3 Phase Ground Overcurrent Protection
  • Programmable Time Current Curves
  • Over/Under Voltage
  • Over/Under Frequency
  • Synch Check
  • 4 Shot Reclosing
  • Fault Location
  • 4 Setting Groups
  • Analog Outputs/Input (8/1)
  • Metering I, V, W, Var, VA, PF, Hz, Wh, Varh
  • Waveform Capturing
  • RS485 Communications
  • DNP3.0 and Modbus RTU Protocols
  • Flash Memory for Upgrades
  • Drawout Construction
  • Programmable Display
  • Simulation Test Mode
  • IRIG-B Time Sync

26
SR489 Generator Management Relay
  • Product Overview
  • Ideal Protection for Induction and Synchronous
    Generators at 25, 50 and 60Hz
  • Complete Generator Protection including
  • Generator Stator Differential
  • 2 Zone Distance Backup
  • 100 Stator Ground
  • High speed sampling, 12 samples per cycle
  • Drawout Case Installation
  • Powerful Fault Recording Waveform, Sequence of
    Events
  • Ethernet and Serial Communications
  • EnerVista Suite of Software supported
  • Metering of all important parameters

27
SR489 Protection Functions
  • Protection Functions Include
  • Generator Stator Differential
  • Backup Distance Protection
  • 100 Stator Ground
  • Generator Unbalance
  • Loss of Excitation
  • Accidental Energization
  • Breaker Fail
  • Phase Overcurrent Voltage Restraint
  • Neutral Inst. / Timed Overcurrent
  • Neg. Sequence Overcurrent
  • Under / Over Voltage
  • Under / Over Frequency
  • Generator Thermal Model
  • RTD Temperature
  • Overexcitation Volts/Hertz

28
SR745 - Transformer Protection
  • 64 Samples/Cycle
  • 3 Phase Differential Protection
  • 3 Phase Ground Overcurrent per Winding
  • Adaptive Time Overcurrent
  • Programmable Time Current Curves
  • Loss of Life Monitoring (Opt.)
  • 4 Setting Groups
  • Harmonic Analysis (up to 25st)
  • Angle Zero Sequence Compensation
  • Analog Outputs/Input (Opt.)
  • 2 3 Winding Models
  • Configurable Logic
  • Waveform Capturing Playback
  • Simulation Test Mode
  • Flash Memory for Upgrades
  • RS485 Communications
  • Modbus RTU and DNP3.0 Protocols
  • Programmable Display
  • Dynamic CT Ratio Correction

SR745
Transformer Management Relay
29
The UR Family - One Common Architecture
  • L60 (Transmission Line Phase Comparison)
  • L90 (Transmission Line Current Differential)
  • D30, D60, abd D90 (Transmission Line Distance)
  • B30 and B90 (Busbar 6 to 24 Feeder)
  • F35 (Feeder Multiple Feeders - Basic
    Protection)
  • F60 (Feeder Comprehensive w Hi-Z)
  • T60 (Transformer Comprehensive)
  • C30 (Control IED)
  • C60 (Breaker Management IED)

GENERATION / MOTOR
  • G30 and G60 (Generator Comprehensive)
  • T60 and T35 (Transformer Basic up to 6
    Windings)
  • B30 and B90 (Busbar Comprehensive up to 24
    Feeders)
  • M60 (Motor)

The Engine for Substation / Plant Automation
30
Modular Hardware Family
31
Physical Realization
High-Speed Data Bus
32
Modularity...
33
Modularity... !
34
Upgradeability/Serviceability
CPU Automatically Recognizes New Hardware
upon Initialization
35
Example Busbar with 5 Feeders
36
Example Inputs in to UR Relay
37
Example UR Relay using Sources
79
79
79
79
79
Universal Relay
38
F60 Feeder Protection
  • Single Feeder Protection with Bus Voltage
  • Phase, Neutral Ground Time Overcurrent (51P,
    51N, 51G)
  • Phase, Neutral Ground Inst.Overcurrent (50P,
    50N, 50G)
  • Negative Sequence Time Overcurrent (51_2)
  • Negative Sequence Inst.Overcurrent (50_2)
  • Fast or EM Reset Characteristic for TOC Elements
  • Phase, Neutral and Negative Sequence Directional
    Control
  • Phase Undervoltage Overvoltage
  • Negative Sequence Overvoltage
  • Underfrequency (6 elements)
  • Overfrequency
  • 4 Shot Autoreclosing with Sequence Coordination
  • VT Fuse Failure
  • Programmable Fast Slow Operations
  • Breaker Failure (50BF)
  • Synchrocheck (25)
  • Cold Load Pickup
  • Breaker Arcing Current (I2t)
  • Data Logger Fault Location

39
F35 Multiple Feeder Protection
  • 5 Feeder Protection with Bus Voltage
  • 6 Feeder Protection w/o Bus Voltage
  • Programmable LED Panels
  • (6) Phase TOC elements
  • (12) Phase IOC elements
  • (6) Neutral TOC elements
  • (12) Neutral IOC elements
  • (6) Ground TOC elements
  • (12) Ground IOC elements
  • (1) Phase Undervoltage element
  • (6) Underfrequency elements
  • (6) Autoreclosing elements
  • FlexLogic with gates and timers
  • Transducer I/O
  • Data Logger
  • Metering
  • Oscillography
  • Event Recorder
  • Demand Recording

40
LED Programmability
41
T60 Transformer Protection
  • Up to 4 Restraint Inputs
  • 2 3 Restraint with Three Phase Voltage Inputs
  • 4 Restraint without Voltage Inputs
  • Dual Slope Percent Differential Protection (87T)
  • Harmonic Inhibit Feature
  • Overexitation Inhibit Feature
  • Instantaneous Differential Element (50/87)
  • Overcurrent Protection Per Winding (50/51)
  • Phase, Neutral Ground Time Overcurrent
  • Phase, Neutral Ground Inst.Overcurrent
  • Fast or EM Reset Characteristic for TOC Elements
  • Phase Undervoltage
  • Phase Overvoltage
  • Phase Neutral Directional OC
  • Volts/Hz
  • Restricted Ground Fault
  • RTD and dcmA Inputs Available
  • Underfrequency (6 elements)
  • Data Logger

42
UR Applications
Option 1 T60 - Transformer Protection F60 - Main
Feeder Protection F35 - Backup Feeder Protection
43
UR Applications
Option 2 T60 - Transformer Protection F35 - Main
Feeder Protection F35 - Backup Feeder Protection
44
Tools
45
Free PC Software and Firmware
  • Windows based
  • Access all
  • Actual Values
  • Setpoints
  • Status
  • Event records
  • Oscillography
  • Graphical trending
  • Setpoint programming
  • Setpoint files
  • Download updated firmware to Flash memory

46
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47
(No Transcript)
48
Enervista Launchpad http//www.geindustrial.com/m
ultilin/enervista/launchpad/
49
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50
(No Transcript)
51
Demo Relays at L-3
52
ANSI Symbols
53
Conversion of Electro-Mechanical to Electronic
sheet
54
PowerPoint presentations at
http//l-3.com/private/levine/
55
GE Multilin Training CDs
56
  • Thank You
  • Questions?
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