gunnar stranne reb 670 busbar protection - · pdf filereb 670 busbar protection ... busbar...

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2006-08-30 PTSX Gunnar Stranne

Santiago de ChileSeptiembre 5, 2006

REB 670Busbar Protection

Gunnar Stranne

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Application Areas for REB 670

� Differential, CBF & Non-Dir OC Protection for:

� Busbars� Meshed corners, � T-protection

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� 3-Phase Version

� Two measuring zone

� CBF, OC, EnFP & AR� 4 or 8 bays

� 1-Phase Version

� Two measuring zones

� CBF, OC, EnFP & AR� 12 or 24 bays� One terminal per phase� Summation

REB 670*1.0 … Available Versions

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REB 670*1.0 Variants

3Ph, 4 bays, 2 zoneUsed for small, fixed zones like

T protection, meshed corner, ring bus etc.

Not ApplicableNot Applicable

3Ph, 8 bays, 2 zoneNot ApplicableNot Applicable Used for small substations with

up to 8 CT inputs. Complete zone selection & CBF

protection!

1Ph, 12 bays, 2 zone(three IEDs required)

Used for substation with up to 12 CT inputs. No zone

selection possible due to limited No. of IO cards. No

extension possibilities!Good for stations with fixed

zones (i.e. 1½ breaker).

Used for substation with up to 12 CT inputs. Possible to use

zone selection & CBF. Possible to extend to 24 CT inputs

1Ph, 24 bays, 2 zone(three IEDs required)

Not ApplicableNot ApplicableUsed for substation with up to 24 CT inputs. Possible to use

zone selection & CBF, but possible application problems due to binary IO limitations.

12I + 3*IO Cards 12I/24I + 11*IO Cards

A20A20

A31A31

B20B20 B21B21

B31B31

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½ of 19” Case

1 TRM 12I only! up to 3 I/O modules

Available I/O-modules ½ 19” case

BIM(max 3st)

16 binary inputs

BOM(max 3st)

24 binary outputs(12*2contacts)

IOM(max 3st)

10+2 binary outputsand 8 binary inputs

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Full of 19” Case

1 or 2 TRM 12I only!up to 11 I/O modules

Available I/O-modules 1/1 19” case

BIM(max 11st)

16 binary inputs

BOM(max 4st)

24 binary outputs(12*2contacts)

IOM(max 11st)

10+2 binary outputsand 8 binary inputs

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Application Areas:� Smaller Buses (up to 8 CTs per zone)� Single Busbar Stations (with Transfer Bus)� 1½ Breaker Stations � Double Busbar Stations (with Transfer Bus)� Zone Interconnection included in the design

Three-Phase Terminal; 4/8 Bays- Double Zone

No switching in CT secondary circuitsNo switching in CT secondary circuits

REB 670; 3Ph2 Zones (A & B); 8 Bays

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Capacitor Reactor

REB 670*1.0 3-Ph; basic applications Diff & CBF

M/G

Generator/MotorAuto-Transformer

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REB 670 3- Ph; BBP, BFP & EnFP for single buses

Single Bus with bus tie CBup to 3/7 feeder bays on each side

ZA ZBZA

Single Busbarup to 4/8 feeder bays

T connections

ZA

ZB

Alternative CT Location

H type station with bus-section CBor sectionalizing disconnector

ZA ZB

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REB 670 3- Ph, BBP, BFP, EnFP for 1½ CB stations

1½ Breaker Stationsup to 4 diameters

ZA

ZB

1½ Breaker Stationsup to 8 diameters

ZA

ZB

.. .

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REB 670 3- Ph; BBP, BFP & EnFP for Double CB stations


Double Breaker Stationup to 8 feeders

ZA

ZB

.. .

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REB 670 1- Ph; BBP, BFP & EnFP for double buses

Isolator replica in REB 670*1.0 by CAP 531 Configuration

Double Bus with bus-coupler CBand up to 6/7 feeder bays

ZB

ZA

.. .

Optional Measuring Point

Double Busbars with bus coupler CB and Transfer Busup to 6/7 feeder bays

ZB

ZA

Transfer Bus

Transfer Bay

.. .

.. .

.. .

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EQUIPMENT INCLUDED in the PANEL:1 pcs 3 phase, Busbar protection terminal REB 670*1.0

- two differential zones- check zone- eight CB failure relays- eight OC feeder backup protection (EnFP)- internal disconnector replica logic- internal individual bay tripping logic- disconnector status supervision

700

ABB

Scheme Layout for Double Busbar; 2 Zones/7 feeders

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Application Areas:� Bigger Buses (up to 12/24 bays per zone)� Single Busbar Stations (with Transfer Bus)� 1½ Breaker Stations � Double Busbar Stations (with Transfer Bus)� Load Transfer is included into the design� 3 Terminals required for complete scheme� LDCM available to share binary IO

Single-Phase Terminal; 12/24 Bays- Double Zone

No switching in CT secondary circuitsNo switching in CT secondary circuitsREB 670; Ph-L32 Zones (A & B); 24 Bays

REB 670; Ph-L22 Zones (A & B); 24 Bays

REB 670; Ph-L12 Zones (A & B); 24 Bays

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REB 670 1- Ph; BBP, BFP & EnFP for single buses

Single Busup to 12/24 feeder bays

ZA.. .

Single Bus with bus-section disconnectorup to 12/24 feeder bays (i.e. 12+12; 16+8 etc.)

ZA ZB.. . .. .

Single Bus with bus-section CBup to 11/23 feeder bays on each side

ZA ZB.. . .. .

Single Bus with bus-section CB, up to11/23 feeder bays (i.e. 12+11; 10+13 etc.)

ZA ZB.. ... .

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REB 670 1- Ph; BBP applications for 1½ CB stations

1½ Breaker Stations up to 12 / 24 diameters

ZA

ZB

.. .

1½ Breaker Stationsup to 6 / 12 diameters

ZA

ZB

.. .

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REB 670 1- Ph, Complete BBP, CBF & EnFP for 1½ CB Stations!

Bus Diff, CB Fail & EnFP1½ Breaker Stations up to 4/8 diameters

ZA

ZB

.. .

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REB 670 1- Ph; BBP, BFP & EnFP for Double CB stations

Double Breaker Stationup to 6 / 12 feeders

ZA

ZB

.. .

ZA

ZB

Double Breaker Stationup to 12 / 24 feeders

.. .

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2006-04-20 PTSX Gunnar Stranne Optional Measuring Point


Double Bus with bus-coupler CBup to 22/23 feeder bays

ZB

ZA

.. .


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REB 670 1- Ph; BBP, BFP & EnFP for double bus & transfer

Double Busbars with Transfer Busup to 22/23 feeder bays

ZB

ZA

Transfer Bus

Transfer Bay

.. .

.. .

.. .

Bus-Coupler Bay

ZB

ZA

Transfer Bus

Combined Bus-Coupler & Transfer Bay

.. .

.. .

.. .


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EQUIPMENT INCLUDED in the PANEL:3 pcs 1 phase, Busbar protection terminal REB 670*1.0

- two differential zones- check zone- 24 CB failure relays- 24 OC feeder backup protection (EnFP)- internal disconnector replica logic- internal individual bay tripping logic- disconnector status supervision

700

ABB

Scheme Layout for Double Busbar; 2 Zones/22 feeders

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Four Zone Double Bus with two BC-CBs one BS-CB and one sectionalizing disconnector with up to 18-20 feeder bays in the whole station

Optional Measuring Point

Four Zone Double Bus with two bus-coupler CBs and two bus-section CBs and up to 20/21 feeder bays on each station side

Reserve 2

Main 2

Reserve 1

Main 1

.. ... .

Reserve 2

Main 2

Reserve 1

Main 1

.. ... .

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� Buses up to 24 bays per zone� Single Busbar� 1½ Breaker Systems � Double Busbar � Same applications possible as for 1Ph solution� Software Driven Zone Selection� CBF ???� OCP (EnFP) ??? � DR, ER, EL ???�Cost effective Solution

REB 670; 1 Ph2 Zones (A & B); 24 Bays

+ N + N timestimes

N N ≤≤≤≤≤≤≤≤ 88

REB 670*1.0; 1-ph version Summation Principle

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Features in REB 670*1.0

� Fast differential protection (12ms)

� Additional sensitive differential protection characteristic

� Smart open CT detection

� Check zone is available

� Id and Iin level supervision

� Advanced zone selection

� Graphical configuration tool

� Integrated zone interconnection (i.e. Load transfer)

� Complete disconnector and/or CB position supervision & alarming

� Proper CB failure for every CT input

� 4-stage backup overcurrent for every CT input

� End fault protection by 4th overcurrent stage

� Disturbance and event recorder

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REB 670 Allocation of BBP Software Functionality

� Zone Selection� Dynamic Software CT switching

(i.e. no switching in CT secondary circuits neither interposing CTsare required)

� Easy adaptation to different substation layouts such as: single or double bus (with transfer bus), one-and-half or double breaker, etc.

� Simple adaptation to buses with only one set of CTs in the bus-section or bus-coupler bays

� Selective BBP & BFP tripping for every bay

� Merging of the two differential zones when required (i.e. during load transfer in double busbarstations)

� Disconnector and/or circuit breaker status supervision

� Differential Zones� High speed tripping for internal

faults. Typical operating time 12 ms

� Complete stability for through faults, with heavy CT saturation, and a maximum remanence in the CT core at auto-reclosing

� Low CT requirement, only 2 milliseconds to saturation needed for correct operation

� Intelligent detection for open or shorted CT secondary circuits and settable blocking of differential protection zone

� Sensitive differential protection stage for power systems with limited earth-fault current

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Toll => PCM 600 for Whole 670 Series

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PCM 600 => CAP 531 + SMT + PST

PST

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What is done Where for BBP in REB 670

� CAP 531- Configuration� Determine Disconnector and

CB positions via a&b contact

� Dynamic CT switching software logic based on Disconnector and CB positions

� CBF & BBP Tripping Scheme

� EnFP Scheme and Tripping

� Intertripping Scheme

� PST - Settings� Fix CT inputs to one of the

two zones

� Set Disconnector/CB behavior

� Connect CTs to Check Zone

� Set Diff Characteristics

� Set CBF pickup and time delays

� Set OC/EnFP and time delays

� SMT� Connect required number of bays to I/O modules included in REB 670

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REB 670 BBP Software Structure / Function Blocks

� Zone Selection� Primary Switchgear Objects

Status (i.e. disconnector and breakers)

� Bay (Interface towards one Primary Bay)

� Zone Interconnection (Merging of two zones when required)

� Differential Zones� Zone A

(Id>, OCT, Sensitive Id>)

� Zone B (Id>, OCT, Sensitive Id>)

� Check Zone (Id>)

One Basic Function in AFL,

Hidden connections exist

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� Very fast, minimum operating time 10 ms

� Extremely stable for external faults

� Completely phase segregated measurement

� Differential algorithm not dependent on the number of connected feeders

� Very low CT requirements, only 2 ms before CT saturation

� Any CT ratio difference can be accommodated

� Settings entered directly in primary amperes

Differential Protection in REB 670*1.0

Differential protectionoperation characteristic

Operateregion

Diff Oper Level

I d [P

rimar

y A

mps

]

Iin [Primary Amps]

s=0.53

I d=I in

Sensitive Oper Level

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� Used in low impedance earthed power system or in other special applications

� It has the following characteristics:� Freely settable characteristic with time delay possibility� Automatically blocked for heavy ph-to-ph faults� External release via binary signal (i.e. from open delta

voltage, transformer neutral point current, etc.)

Sensitive Differential Protection in REB 670*1.0


Operateregion

Diff Oper Level

I d [P

rimar

y A

mps

]

Iin [Primary Amps]

s=0.53

I d=I in

Sensitivedifferentialprotection

en04000260.vsd


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Operateregion

Diff Oper Level

I d [P

rimar

y A

mps

]

Iin [Primary Amps]

s=0.53

I d=I in

Sensitivedifferentialprotection

en04000260.vsd


� Slow and Fast Open CT detection (same as in RED 521*1.0)� Settable influence of slow and fast open CT logic:

� Off (switched off)� Block (Block diff protection, same as in RED 521*1.0)� Supervise (Doesn't block, just increase minimum

differential operation level as shown below)

Open CT detection for REB 670*1.0

OCT Logic Supervision Level

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� Independent check zone available� Can be switched off (default setting)� Freely settable which CTs shall be connected to check zone� Provide stability in case of problem with disconnector

auxiliary contacts ( stuck contacts or wiring problems)

Check Zone in REB 670*1.0

Oper Level

s=0.0-0.90 (settable)

Iout [Primary Amps]

I d [P

rimar

y A

mps

]

Operateregion

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� Two new types of Diff Zone supervision are available� Id> traditional supervision of differential current level

with settable time delay(i.e. can be used as alarm or for automatic reset of OCT condition)

� Iin> incoming current supervision, without time delay (i.e. can be used to trigger DR for external faults)

Zone Supervision in REB 670*1.0

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Disconnector/CB supervision & alarming

� For every disconnector/CB status is determined from the status of aux contacts (i.e. a & b contacts)� Two schemes available

� Position of a disconnector/CB can be forced to OPEN or CLOSED by a parameter setting

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� Easy to set, configure, install & use� Very easy to adapt to simple buses� Pre-configured for most typical substation layouts

� BayConnections Matrix on built-in, front HMI with User Settable Individual Bay Names

� SwitchgearStatus Matrix on built-in, front HMI with Settable Individual Primary Switchgear Object Names

� Visible User Defined Bay Names when setting change is performed from the built-in, front HMI or PST

� Visible User Defined Switchgear Object Name when setting change is performed from the built-in, front HMI or PST

User Friendliness in REB 670*1.0 (3-Ph & 1-Ph)

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Available Configurations X01, X02 & X03

� Just BBP for simple stations layouts (i.e. 1½ CB, Double Breaker, Single Breaker, or for double busbar-single breaker stations where Zone Selection is done by using just b contacts). Available for all five versions A20, A31, B20, B21 & B31. Direct replacement for RED 521*1.0

� Just BBP for double busbar-single breaker stations where Zone Selection is done by using a&b contacts from disconnectors and breakers. Available for versions A31, B21 & B31

� BBP with BFP, EnFP & OCP for double busbar-single breaker stations where Zone Selection is done by using a&b contacts from disconnectors and breakers. Available for versions A31, B21 & B31

� For other station layouts or functionality CAP 531 configuration shall be arranged by the end user.

� Make available library of configurations for different station layouts?

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Breaker Failure Protection (BFP)

� Complete CB failure protection within REB 670*1.0 with:� 1ph and/or 3ph starting

� Re-trip (i.e. first time delay)

� Backup trip / bus-strip (i.e. second time delay)

� Short rest time of 15ms

� Trips correctly only associated CBs via busbar disconnectorreplica available inside busbar differential protection

� Integrated station wide trip logic available from Zone Selection

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Phase Overcurrent function (TOC)

� Four, non-directional phase overcurrent stages

� Each stage can be Definite- or Inverse time delayed.� 19 IEC/ANSI curves

� Logarithmic inverse

� Taylor made curve is available

� Each stage can be separately blocked with second harmonic

� 4th stage can be used for end fault protection

IF

3I>

4

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End Fault Protection

FeederProtection

BusbarProtection

FeederProtection

BusbarProtection

CT=Measuring Boundary

CB=Clearing Boundary

When feeder CB is open, stop measuring

boundary at the open CB contacts

in order to avoid over-trip and

activate fast OC protection to trip remote end only

When feeder CB is open, extend measuring boundary to the open CB contacts in order to avoid under-trip

Over-TripZone

Under-TripZone

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Autoreclosing Function (AR)

� Only used in certain markets in order to try to re-energize the bus after BBP trip

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� Up to 40 recording channels!� Sampling rate 20 samples per power system cycle� Disturbance recording of all 24 analogue input channels� Disturbance recording of all differential currents� Disturbance recording of all incoming currents� Up to 96 binary signals can be recorded as well� DR file is saved in the terminal in COMTRADE format� Last 30 recordings are stored in the terminal� Each recording up to 6s long� Internal even list with last 1000 binary events available in

the terminal

Disturbance and Event Recorder in REB 670*1.0

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Communication

� Front connection:

� RJ45 Ethernet port

� Protocol: TCP/IP (transparent SPA)

� Rear Communication� IEC61850

� IEC103

� SPA

� LON

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A Breakthrough for Substation Automation

� One world

� One technology

� One standard

IEC 61850

��

CommunicationCapabilities

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Designed for IEC 61850

Remote control (NCC)

Station bus IEC61850-8-1

MicroSCADA Pro

StationGateway

Protection ControlProtection Protection& Control

SMS & PCMVia TCP/IP WAN or modem

CommunicationCapabilities

Utility LAN TCP/IP

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Successful FAT for the first REB 670 delivery

2006-02-28 - Vantaa Energy Ltd utility from Finland is the first customer for REB 670 busbar protection. A successful FAT (factory acceptance test) was performed in Västeråsduring February 21-22, 2006 and witnessed by the customer.

A large number of internal and external faults were simulated on the advanced real-time simulator. All tests succeeded to 100%. REB 670 proved its unique speed with sub-cycle tripping times down to 11 ms.

The following tests were included: •Switching of busbar zone •Testing of load transfer •Testing of by-pass of Bay Breaker with the transfer disconnector•Testing of restraint stage operating level •Testing of OCT operating level •Testing of sensitive EF stage operating level •Test of service values •Test of protection tripping and alarm outputs •Test of system alarms •Verification of upload of disturbance recorder files •Test of breaker failure relay

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First Swedish Order for IED 670 includes REB 670

A press-release dated 2006-01-12 informed that Skellefteå Kraft Elnät had ordered the new transmission line terminals IED 670. The first order in Sweden for IED 670.

The order was for; 3- Line protection terminals REL 6701- Busbar protection REB 670

gunnar stranne reb 670 busbar protection - · pdf filereb 670 busbar protection ... busbar...

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