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Efficient Applications of Bus Transfer Schemes Utilizing - IEEE REPC

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Efficient Applications of Bus Transfer Schemes Utilizing - IEEE REPC Powered By Docstoc
					Utilizing IED Capability to Reduce
               Wiring




    Terrence Smith, GE Digital Energy Multilin
     Richard Hunt, GE Digital Energy Multilin
      Jakov Vico, GE Digital Energy Multilin
Introduction




Reducing Wiring is not a new concept
Introduction
Review of the Design/Installation Process

A case study of a medium voltage breaker

A case study of a transmission breaker

A case study of a control IED as a transformer
alarm aggregator
Introduction
A case study of a high voltage circuit breaker
using process bus.

A look at the direction the industry will likely
head.

Rules we can develop from the case studies.
Introduction-How the design is
communicated




Typical Schematic Diagram
Introduction-How the design is
communicated




Typical Wiring Diagram
Introduction-How the design is
communicated          Engineer Prepares/
                     Recieves Work Scope




                          Single Line
                           Diagram          Engineer Prepares
                                               Elementary
                                                Diagrams                 Handoffs

                          Three Line
                           Diagram




The design process
                                            Drafter Creates/
                                            Modifies Drawing


                                                                 Has
                     Elementary Diagrams                        Errors


                                            Engineer Checks
                                             Drafters work



                                               Error Free




                       Wiring Diagrams




                       Cable Schedules




                        Bill of Materials




                       Engineer Issues
                      Completed Package
  Introduction-How the design is
  communicated

   The design
   process
                                                           Extended Extended Extended
                      Number of Engineer Draft    Check    Engineer Draft      Check
Drawing Name          Drawings Hours     Hours Hours       Hours     Hours     Hours
Single Line Diagram           1        8        8      4           8         8        4
Three Line Diagram            1        8        8      4           8         8        4
Schematics                    6       12       16      4          72        96       24
Panel Wiring                  5       16       20      8          80       100       40
Breaker Wiring                5        8        8      4          40        40       20
                                                   Total         208       252       92
Case Study One- Medium Voltage
Switchgear
Case Study One- Medium Voltage
Switchgear




             Replace with IED Pushbutton
Case Study One- Medium Voltage
Switchgear




             Replace with Latching Elements
             and IED Communications
Case Study One- Medium Voltage
Switchgear




    Replace IED to SCADA
    communications
Case Study One- Medium Voltage
Switchgear
Case Study One- Medium Voltage
Switchgear



                    Replaces Control
                    Switch
Case Study One- Medium Voltage
Switchgear



                    Replaces SCADA Trip
                    Contact
Case Study One- Medium Voltage
Switchgear



                    Replaces Lockout
                    Relays
Case Study One- Medium Voltage
Switchgear



                    The new circuit is
                    much simpler
Case Study One- Medium Voltage
Switchgear



The real value of
internal lockout
relays is seen in the
close circuit
      Case Study One- Medium Voltage
      Switchgear
     CONTROL PUSHBUTTON 2 ON

          Auto Close On (VO7)      20
                                 OR
                                 OR                                    21                         Cont Op 2 (H2)
                                                                 22   AND
                                                                      AND                                       I on
         Remote Close On (VI2)                                              Close BRKR (VO2)   Operate
                                                                                                                I off
                                                                                                               V on
                                                                                               Seal-In
           Cont Ip 1 On(H5a)                                                                                   V off
                                   Latch 1
             TRIPBUS 1 OP        Set     On        86A (VO1)

     CONTROL PUSHBUTTON 3 ON     Reset       Off



                                   Latch 2
                                                                 23
R   86TA Tripped On (RI1)        Set     On        86TA (VO3)

R    86T Reset On (RI4)          Reset       Off


                                   Latch 3
                                                                 24
          BKR FAIL 1 TRIP OP     Set     On        86BF (VO4)

          PUSHBUTTON 4 ON        Reset       Off


                                   Latch 4
                                                                 25
R   86T Tripped On (RI3)         Set     On        86Tie (VO5)

R    86T Reset On (RI4)          Reset       Off



                                   Latch 5
                                                                 26
R   86U Tripped On (RI5)         Set     On        86U (VO6)

R    86U Reset On (RI6)          Reset       Off



            SYNC 1 CLS OP
      Case Study One- Medium Voltage
      Switchgear
     CONTROL PUSHBUTTON 2 ON

          Auto Close On (VO7)      20
                                 OR
                                 OR                                     21                         Cont Op 2 (H2)
                                                                 22    AND
                                                                       AND                                       I on
         Remote Close On (VI2)                                               Close BRKR (VO2)   Operate
                                                                                                                 I off
                                                                                                                V on
                                                                                                Seal-In
           Cont Ip 1 On(H5a)                                                                                    V off
                                   Latch 1
             TRIPBUS 1 OP        Set     On        86A (VO1)

     CONTROL PUSHBUTTON 3 ON     Reset       Off
                                                                      Close Operands
                                   Latch 2
                                                                 23
R   86TA Tripped On (RI1)        Set     On        86TA (VO3)

R    86T Reset On (RI4)          Reset       Off


                                   Latch 3
                                                                 24
          BKR FAIL 1 TRIP OP     Set     On        86BF (VO4)

          PUSHBUTTON 4 ON        Reset       Off


                                   Latch 4
                                                                 25
R   86T Tripped On (RI3)         Set     On        86Tie (VO5)

R    86T Reset On (RI4)          Reset       Off



                                   Latch 5
                                                                 26
R   86U Tripped On (RI5)         Set     On        86U (VO6)

R    86U Reset On (RI6)          Reset       Off



            SYNC 1 CLS OP
      Case Study One- Medium Voltage
      Switchgear
     CONTROL PUSHBUTTON 2 ON

          Auto Close On (VO7)      20
                                 OR
                                 OR                                     21                         Cont Op 2 (H2)
                                                                 22    AND
                                                                       AND                                       I on
         Remote Close On (VI2)                                               Close BRKR (VO2)   Operate
                                                                                                                 I off
                                                                                                                V on
                                                                                                Seal-In
           Cont Ip 1 On(H5a)                                                                                    V off
                                   Latch 1
             TRIPBUS 1 OP        Set     On        86A (VO1)

     CONTROL PUSHBUTTON 3 ON     Reset       Off
                                                                      Close Operands
                                   Latch 2
                                                                 23
R   86TA Tripped On (RI1)        Set     On        86TA (VO3)

R    86T Reset On (RI4)          Reset       Off


                                   Latch 3


                                                                      Block Close Logic
                                                                 24
          BKR FAIL 1 TRIP OP     Set     On        86BF (VO4)

          PUSHBUTTON 4 ON        Reset       Off


                                   Latch 4
                                                                 25
R   86T Tripped On (RI3)         Set     On        86Tie (VO5)

R    86T Reset On (RI4)          Reset       Off



                                   Latch 5
                                                                 26
R   86U Tripped On (RI5)         Set     On        86U (VO6)

R    86U Reset On (RI6)          Reset       Off



            SYNC 1 CLS OP
Case Study One- Medium Voltage
Switchgear
Optimization Benefits
1. Simpler Circuits meaning reduced
design time, reduced wiring time, and
reduced commissioning time.

2. Bench tested logic replaces wiring which
reduces commissioning time.

3. Logic is repeatable and consistent.
Case Study One- Medium Voltage
Switchgear
Optimization Challenges

1. Cost of communications equipment,
design, and installation

2. Operational challenges associated with
process change.
Case Study Two – Breaker and a Half
Scheme
                                 CT1                    CB 1
                                       3Y      3Y        5           3Y      3Y3Y
                                 CT2                     2


                          52-2


                                 CT3
            To Adjacent
                                 CT4                                  3 phase
               Zone
                                                                      currents
 IED-1   IED-2
                                 CT4
            To Adjacent          CT3
                                                               o   Breaker Trip (2)
               Zone                                            o   Breaker Close

                          52-1
                                       o    Breaker status points (-a, -b)
                                       o    Gas pressure alarm
                                 CT2   o    Spring alarm
                                 CT1   o    Maintenance alarm
                                       o    Trip coil monitor
                                       o    Close coil monitor
Case Study Two – Breaker and a Half
Scheme             Wired                                          Wires Req. to
                  Process                                         Hardw ire Alarms and
                Input/Output          Process Destination         Control
               CT 1            IED 1, SCADA, DFR                           4
               CT 2            IED 2, SCADA, DFR                           4

               CT 3            Adjacent Zone IED 1, SCADA, DFR             4

               CT 4            Adjacent Zone IED 1, SCADA, DFR             4
               DC1             NA Breaker TR/CL supply 1                   2
               DC2             NA Breaker TR/CL supply 2                   2
               AC1             NA Breaker AC supply                        4
               Trip            From IED 1, IED 2, SCADA, to DFR            6
               Close           From IED 1, IED 2, SCADA, to DFR            6
               Breaker 52a To IED1, IED 2, SCADA                           6
               Breaker 52b To IED1, IED 2, SCADA                           6
               Breaker
               Gas Alarm To SCADA                                          2

               Spring Alarm To SCADA                                       2

               Breaker
               Maintenance To IED1, IED 2,SCADA                            6
               Trip Coil
               Monitor     SCADA                                           2
               Close Coil
               Monitor     SCADA                                           2
                                                   Total Wires                    62
                                           Total Term inations                   124
 Case Study Two – Breaker and a Half
 Scheme                   Wired                                          Wires Req. to
                         Process                                         Hardw ire Alarms and
                       Input/Output          Process Destination         Control
                       CT 1           IED 1, SCADA, DFR                           4
                       CT 2           IED 2, SCADA, DFR                           4

                       CT 3           Adjacent Zone IED 1, SCADA, DFR             4

                       CT 4           Adjacent Zone IED 1, SCADA, DFR             4
                       DC1            NA Breaker TR/CL supply 1                   2
                       DC2            NA Breaker TR/CL supply 2                   2

62 wires and 124       AC1
                       Trip
                                      NA Breaker AC supply
                                      From IED 1, IED 2, SCADA, to DFR
                                                                                  4
                                                                                  6


terminations for one
                       Close          From IED 1, IED 2, SCADA, to DFR            6
                       Breaker 52a To IED1, IED 2, SCADA                          6
                       Breaker 52b To IED1, IED 2, SCADA                          6

breaker of this        Breaker
                       Gas Alarm To SCADA                                         2


scheme.                Spring Alarm To SCADA                                      2

                       Breaker
                       Maintenance To IED1, IED 2,SCADA                           6
                       Trip Coil
                       Monitor     SCADA                                          2
                       Close Coil
                       Monitor     SCADA                                          2
                                                          Total Wires                    62
                                                  Total Term inations                   124
Case Study Two – Breaker and a Half
Scheme       Wired                                          Wires Req. to        Wires Req.
            Process                                         Hardw ire Alarms and for SCADA
          Input/Output          Process Destination         Control              Comm.
         CT 1            IED 1, SCADA, DFR                           4                4
         CT 2            IED 2, SCADA, DFR                           4                4

         CT 3            Adjacent Zone IED 1, SCADA, DFR             4                4

         CT 4            Adjacent Zone IED 1, SCADA, DFR             4                4
         DC1             NA Breaker TR/CL supply 1                   2                2
         DC2             NA Breaker TR/CL supply 2                   2                2
         AC1             NA Breaker AC supply                        4                2
         Trip            From IED 1, IED 2, SCADA, to DFR            6                4
         Close           From IED 1, IED 2, SCADA, to DFR            6                4
         Breaker 52a To IED1, IED 2, SCADA                           6                4
         Breaker 52b To IED1, IED 2, SCADA                           6                4
         Breaker
         Gas Alarm To SCADA                                          2                2

         Spring Alarm To SCADA                                       2                2

         Breaker
         Maintenance To IED1, IED 2,SCADA                            6                2
         Trip Coil
         Monitor     SCADA                                           2                2
         Close Coil
         Monitor     SCADA                                           2                2
                                             Total Wires                    62            48
                                     Total Term inations                   124            96
Case Study Two – Breaker and a Half
Scheme
                                    SCADA

                                 Protective IED

                                 Ethernet Switch
                                                 Control House




                                                    Communication Message
                                                    passes Switchgear status,
                                                    alarms and control from the
                                                    Control House to the
                                                    Switchgear
                                    Switchgear



                  Trip
                  Close
                  52b
             52   52a
                  Gas Alarm
                  Spring Alarm
                  Maint. Alarm
                  TCM
                  CCM


                     Control IED
Case Study Two – Breaker and a Half
Scheme     Wired                                          Wires Req. to        Wires Req.
                                                                                             Wires Req. at
                                                                                             Control House
          Process                                         Hardw ire Alarms and for SCADA     w ith IED
        Input/Output          Process Destination         Control              Comm.         Controller
        CT 1           IED 1, SCADA, DFR                           4                4              4
        CT 2           IED 2, SCADA, DFR                           4                4              4

        CT 3           Adjacent Zone IED 1, SCADA, DFR             4                4              4

        CT 4           Adjacent Zone IED 1, SCADA, DFR             4                4              4
        DC1            NA Breaker TR/CL supply 1                   2                2              2
        DC2            NA Breaker TR/CL supply 2                   2                2              2
        AC1            NA Breaker AC supply                        4                2              2
        Trip           From IED 1, IED 2, SCADA, to DFR            6                4              4
        Close          From IED 1, IED 2, SCADA, to DFR            6                4              0
        Breaker 52a To IED1, IED 2, SCADA                          6                4              0
        Breaker 52b To IED1, IED 2, SCADA                          6                4              0
        Breaker
        Gas Alarm To SCADA                                         2                2              0

        Spring Alarm To SCADA                                      2                2              0

        Breaker
        Maintenance To IED1, IED 2,SCADA                           6                2              0
        Trip Coil
        Monitor     SCADA                                          2                2              0
        Close Coil
        Monitor     SCADA                                          2                2              0
                                           Total Wires                    62            48              26
                                   Total Term inations                   124            96              52
Case Study Three – Transformer
Alarm Aggregator
                                                     Sets of Wires       Sets of Wires
                                                     Req. to Hardw ire   Req. at Control
                                          Process Alarms and             House w ith IED
               Process Point             Destination Control             Controller
    Winding High Temperature Alarm       SCADA                       2                     0
    Winding High Temperature Trip Alarm SCADA                        2                     0
    Oil Temperature Alarm                SCADA                       2                     0
    Oil Temperature Trip Alarm           SCADA                       2                     0
    Low Oil Level Alarm                  SCADA                       2                     0
    Low Oil Level Trip Alarm             SCADA                       2                     0
    Supped Pressure Trip Alarm           SCADA                       2                     0
    Buckholtz Trip Alarm                 SCADA                       2                     0
    Loss of Cooiling AC                  SCADA                       2                     0
    Windind Temperature (RTD)            SCADA                       3                     0
    Oil Temperatue (RTD)                 SCADA                       3                     0
    Ambient Temperature (RTD)            SCADA                       3                     0
                                 Total                              27                     0
Case Study Three – High Voltage
Breaker with Process Bus
          16.8 MH           Breaker                                          7.8 MH          Breaker
       terminations                                                       terminations
                             77.5 MH                                                         29.8 MH
                             134 terminations                                                16 field terminations
                             31 MH engineering                                               116 OEM terminations
  52                         16 MH commissioning                    52                       11.1 MH engineering
                                                                                              4 MH commissioning
                                                                                 Copper cables
                                                                                  between PIU
                                                Copper cables                      and breaker
            4C #10 for CT                        between PIU
                                                  and breaker
            12C #10 for Control                                                Fiber Optic Cable
                                                          Process
            12C #16 for SCADA         44 MH         Interface Unit
                                      pulling                (PIU)                                     20 MH
            7C #16 for SCADA          cables                                                           pulling
                                                                                                       cables
            2C #6 for DC                                                       2C #6 for DC

            4C #10 for AC                                                      4C #10 for AC

            4C #10 for CT




                 16.8 MH                                                             2 MH
              terminations                                                       terminations
Case Study Three – High Voltage
Breaker with Process Bus
Future Directions – A station IED
               Feeder Protection Relay


                      IED




      5    5    5                 5            5   5
      2    2    2                 2            2   2



                                         PIU
Conclusions

 Rule #1: Wire a Process Value once and
 only once.

 Rule #2: If a function does not have to
 be wired, then don’t.
35

				
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