REC 670 Interlocking

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2006-03-30 Substation Automation Products Training

Substation Automation Products

Training

Control IED REC 670 Interlocking

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Contents Purpose and features Basic principles Interaction between bays Reservation method Function blocks

Different switchyard arrangements SCILO POS_EVAL

Implementation example Exercise

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Interlocking

Distributed functionality, not depending on a central function Standardized and well-proven software modules for easy and

safe implementation Information exchange over the station bus, which means

minimizing of cabling between IEDs Interlocking conditions depend on the circuit configuration

and apparatus position status at any given time

The features are:

To avoid dangerous or damaging switchgear operations and to assure personnel safety

The purpose of the interlocking function is:

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Disconnectors shall not be opened or closed on-load

Earthing switches shall not be closed onto voltage

CB:s shall not be closed when surrounding disconnectors are in intermediate positions

CB opening is only interlocked at a bus-coupler bay, if a busbar transfer is in progress

Interlocking Basic principles

The interlocking modules are based on these basic principles:

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Data exchange example between bays

Disc QB1 and QB2 closed

WA1 not earthedWA2 not earthedWA1 and WA2 interconn

Disc QB1 and QB2 closed

WA1 not earthedWA2 not earthedWA1 and WA2 interconn . . . . .

Station bus

QB1

WA1

WA2

Bay 1 Bay n Bus couplerWA1 unearthedWA1 unearthed

WA1 and WA2 interconn

WA1 and WA2 interconn in other bay

Interlocking

QB2

QA1

QB9

QB1 QB2

QA1

QB9

QB2QB1

QA1

QC1 QC2

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Interlockingmodule

Interlockingmodules inother bays

Apparatus controlmodules

SCSWI SXSWISCILO



Interlocking module on bay level

SCSWI SXCBRSCILO

SCSWI SXSWISCILO

Interlocking Interaction between modules

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Interlocking Reservation method

Station bus

Station HSI

GW

CloseDisconnector

OpenBreaker

Control center

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Interlocking modules

Function block ABC_LINE Line bay in arrangements

with single, double, and bypass busbars

Function block ABC_BC Bus coupler in arrangements

with single, double, and bypass busbars

QB1 QB2

QC1

QA1

QC2

QB9QC9

WA1 (A)

WA2 (B)

WA7 (C)

QB7

QB1 QB2

QC1

QA1

WA1 (A)

WA2 (B)

WA7 (C)

QB7QB20

QC2

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Function block AB_TRAFO Transformer bay in

arrangements with single and double busbar

QC

Function block BB_ES Busbar earthing switch on

any busbar part

QB1 QB2QC1

QA1

QC2

WA1 (A)

WA2 (B)

QA2

QC3

T

QC4

QB4QB3

QA2 and QC4 are notused in this interlocking

AB_TRAFO

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Function block A1A2_BS Bus section coupler between bus

sections A1 and A2

Function block A1A2_DC Bus section disconnector between

bus sections A1 and A2

QA1

WA1 (A1)

QB2

QC4

QB1

QC3

WA2 (A2)

WA1 (A1) WA2 (A2)QB

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Function blocksDB_BUS_A, DB_BUS_B Bus links of a double

breaker bay

DB_LINE Line connection of a

double breaker bay

WA1 (A)

WA2 (B)

QB1QC1

QA1

QC2

QC9

QB61

QB9

QB2QC4

QA2

QC5

QC3

QB62

DB_BUS_B

DB_LINE

DB_BUS_A

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Function blocksBH_LINE_A, BH_LINE_B Line connections of a

breaker and a half diameter

BH_CONN Connection between two

lines of a breaker and a half diameter

WA1 (A)

WA2 (B)

QB1QC1

QA1

QC2

QC9

QB6

QB9

QB2QC1

QA1

QC2

QC3

QB6

QC3

QB62QB61 QA1

QC1 QC2

QC9

QB9

BH_LINE_A BH_LINE_B

BH_CONN

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Interlocking SCILO

Open/close position of switch device

Open/close operation from interlocking logic is enabled

Open/close operation at closed/open or intermediate or bad position is enabled

SCILOCI01-

POSOPENPOSCLOSEOPEN_ENCLOSE_EN

EN_OPENEN_CLOSE

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Interlocking SCILO logic

OPEN_EN

POSOPENPOSCLOSE 1 EN_OPEN

EN_CLOSECLOSE_EN

SCILO=1

&

>1

>1

&

&

&

en04000525.vsd

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Interlocking Interaction with apparatus control function

POS_EVALPE01-

POSITION OPENPOSCLOSEPOS

SCILOCI01-

POSOPENPOSCLOSEOPEN_ENCLOSE_EN

EN_OPENEN_CLOSE

SCSWICS01-

BLOCKPSTOL_SELL_OPENL_CLOSEAU_OPENAU_CLOSEBL_CMDRES_GRTRES_EXTSY_INPROSYNC_OKEN_OPENEN_CLOSEXPOS1XPOS2XPOS3

EXE_OPEXE_CL

SELECTEDRES_RQ

START_SYPOSITIONOPENPOS

CLOSEPOSPOLEDISCCMD_BLKL_CAUSE

XOUT

Frominterlockingmodule

SXCBR/SXSWIXC01-/XS01-

BLOCKLR_SWIOPENCLOSEBL_OPENBL_CLOSEBL_UPDPOSOPENPOSCLOSETR_OPENTR_CLOSERS_CNTXIN

EXE_OPEXE_CL

SUBSTEDOP_BLKDCL_BLKD

UPD_BLKD

OPENPOSCLOSEPOS

TR_POSCNT_VALL_CAUSE

XPOS

Tointerlockingmodule

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Interlocking POS_EVAL

POS_EVALPE01-

POSITION OPENPOSCLOSEPOS

Open/close position of switch device

Position including quality

POSITION Quality OPENPOS CLOSEPOS0 0 0 00 1 0 01 0 0 11 1 0 02 0 1 02 1 0 03 0 0 03 1 0 0

Truth table:

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Interlocking Implementation example for an AB-arrangement

QA1_OPQA1_CLQB9_OPQB9_CLQB1_OPQB1_CLQB2_OPQB2_CLQB7_OPQB7_CLQC1_OPQC1_CLQC2_OPQC2_CLQC9_OPQC9_CLQC11_OPQC11_CLQC21_OPQC21_CLQC71_OPQC71_CLBB7_D_OPBC_12_CLBC_17_OPBC_17_CLBC_27_OPBC_27_CLVOLT_OFFVOLT_ONVP_BB7_DVP_BC_12VP_BC_17VP_BC_27EXDU_ESEXDU_BPBEXDU_BCQB9_EX1QB9_EX2QB1_EX1QB1_EX2QB1_EX3QB2_EX1QB2_EX2QB2_EX3QB7_EX1QB7_EX2QB7_EX3QB7_EX4

QA1CLRELQA1CLITL

QB9RELQB9ITL

QB1RELQB1ITL

QB2RELQB2ITL

QB7RELQB7ITL

QC1RELQC1ITL

QC2RELQC2ITL

QC9RELQC9ITL

QB1OPTRQB1CLTRQB2OPTRQB2CLTRQB7OPTRQB7CLTR

QB12OPTRQB12CLTRVPQB1TRVPQB2TRVPQB7TR

VPQB12TR

ABC_LINE

BB_DC_OP

VP_BB_DC

BB_ES

BB_DC_OP

VP_BB_DC

BB_ES

BBTR_OP

VP_BBTR

ABC_BC

ABC_BC

BC12CLTR

VPBC12TR

To apparatus control moduleSCSWI via SCILO for own bay

To earthing switchfor busbar 1 (A)

To earthing switchfor busbar 2 (B)

To bus-coupler bay

VPX = 1 if status of X is valid

EXDU_X = 1 if no transmission error from bay Y

BBESOPTRBBESCLTR

BB_ES

BBESOPTRBBESCLTR

BB_ES

Position indicationsfrom own bay via function blockPOS_EVAL or BI

”1””0”

”1””0”

”1””0”

No transmission error from bus earthing switchesNo transmission error from bus-coupler bay

User-specificconditionsNot used = “1”

Earthing switchfor busbar 1 (A)

Earthing switchfor busbar 2 (B)

From bus-coupler bay

No line voltageand no fuse failure

REC 670 Interlocking

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Transcript of REC 670 Interlocking