Interlocking for line bay

Transcription

1 Page 1 Issued: December 2000 Status: New Data subject to change without notice Features Interlocking function available for a line bay arrangement Suitable for up to double busbars and a transfer busbar Preconfigured and tested interlocking function block Easy to adapt to customer s specific requirements Distributed solution, no central function Application The interlocking function blocks the possibility to operate high voltage switching devices, for instance when a disconnector is under load, in order to prevent material damage and/or accidental bodily injury. Each control terminal has interlocking functions for different switchyard arrangements, each handling interlocking of one bay. The function is distributed to each control terminal and not dependent on any central function. For the station-wide interlocking, the control terminals communicate via the system-wide interbay bus or by using hardwired binary inputs/outputs. The interlocking conditions depend on the circuit configuration and status of the installation at any given time. The interlocking module is used for a line connected to a double busbar arrangement with a transfer busbar according to figure 1. The module can also be used for a double busbar arrangement without transfer busbar or a single busbar arrangement with/ without transfer busbar. Q1 Q0 Q9 Q2 Q51 Q52 Q7 Q8 A (BB1) B (BB2) C (TB) vsd Figure 1: Switchyard layout

2 Page 2 Design For easy and safe implementation of the interlocking function, the control terminal is delivered with standardized and tested software interlocking modules containing logic for the interlocking conditions. The interlocking conditions can be altered, to meet the customer s specific requirements, by adding configurable logic by means of the graphical configuration tool CAP 531. The figure Switchyard layout shows the designations of the apparatuses that can be dealt with by the. Function block Q0_OP Q0_CL Q9_OP Q9_CL Q1_OP Q1_CL Q2_OP Q2_CL Q7_OP Q7_CL Q51_OP Q51_CL Q52_OP Q52_CL Q8_OP Q8_CL Q15_OP Q15_CL Q25_OP Q25_CL Q75_OP Q75_CL C_DC_OP BC_AB_CL BC_AC_OP BC_AC_CL IF01- BC_BC_OP BC_BC_CL VOLT_OP VOLT_CL VP_C_DC VP_BC_AB VP_BC_AC VP_BC_BC EXDUP_ES EXVVA_ES EXDU_BPB EXVV_BPB EXDUP_BC EXVVA_BC Q9EX1 Q9EX2 Q1EX1 Q1EX2 Q1EX3 Q2EX1 Q2EX2 Q2EX3 Q7EX1 Q7EX2 Q7EX3 Q7EX4 Q0CLREL Q0CLITL Q9REL Q9ITL Q1REL Q1ITL Q2REL Q2ITL Q7REL Q7ITL Q51REL Q51ITL Q52REL Q52ITL Q8REL Q8ITL Q1OPTR Q1CLTR Q2OPTR Q2CLTR Q7OPTR Q7CLTR Q1Q2OPTR Q1Q2CLTR VPQ1TR VPQ2TR VPQ7TR VPQ1Q2TR xx vsd Input and output signals Table 1: Input signals for the (IFn) function block Q0_OP is 1 if Q0 is open Q0_CL is 1 if Q0 is closed Q9_OP is 1 if Q9 is open

3 Page 3 Q9_CL Q1_OP Q1_CL Q2_OP Q2_CL Q7_OP Q7_CL Q51_OP Q51_CL Q52_OP Q52_CL Q8_OP Q8_CL Q15_OP Q15_CL Q25_OP Q25_CL Q75_OP Q75_CL C_DC_OP BC_AB_CL BC_AC_OP BC_AC_CL BC_BC_OP BC_BC_CL VOLT_OP VOLT_CL VP_C_DC VP_BC_AB VP_BC_AC VP_BC_BC EXDUP_ES EXVVA_ES EXDU_BPB is 1 if Q9 is closed is 1 if Q1 is open is 1 if Q1 is closed is 1 if Q2 is open is 1 if Q2 is closed is 1 if Q7 is open is 1 if Q7 is closed is 1 if Q51 is open is 1 if Q51 is closed is 1 if Q52 is open is 1 if Q52 is closed is 1 if Q8 is open is 1 if Q8 is closed is 1 if earthing switch Q15 on busbar A is open is 1 if earthing switch Q15 on busbar A is closed is 1 if earthing switch Q25 on busbar B is open is 1 if earthing switch Q25 on busbar B is closed is 1 if earthing switch Q75 on busbar C is open is 1 if earthing switch Q75 on busbar C is closed All line disconnectors on bypass busbar C except in the own bay are open There exists a bus coupler connection between busbar A and B There is no bus coupler connection between busbar A and C There exists a bus coupler connection between busbar A and C There is no bus coupler connection between busbar B and C There exists a bus coupler connection between busbar B and C There is no voltage on the line and not fuse failure There is voltage on the line or there is a VT (fuse) failure Switch status of the disconnectors on bypass busbar C are valid (open or closed) between busbar A and B are valid (open or closed) between busbar A and C are valid (open or closed) between busbar B and C are valid (open or closed) is 1 if there is no transmission error from any bay containing earthing switches Q15, Q25 or Q75 is 1 if the interlocking programs in all bays containing earthing switches Q15, Q25 or Q75 are running is 1 if there is no transmission error from bay BPB

4 Page 4 EXVV_BPB EXDUP_BC EXVVA_BC Q9EX1 Q9EX2 Q1EX1 Q1EX2 Q1EX3 Q2EX1 Q2EX2 Q2EX3 Q7EX1 Q7EX2 Q7EX3 Q7EX4 is 1 if there is no transmission error from any bay containing disconnectors on bypass busbar C is 1 if there is no transmission error from any bus coupler bay is 1 if the interlocking programs in all bus coupler bays are running Input for an external condition for apparatus Q9 Input for an external condition for apparatus Q9 Table 2: Output signals for the (IFn) function block Q0CLREL Closing of Q0 is allowed Q0CLITL Closing of Q0 is forbidden Q9REL Switching of Q9 is allowed Q9ITL Switching of Q9 is forbidden Q1REL Switching of Q1 is allowed Q1ITL Switching of Q1 is forbidden Q2REL Switching of Q2 is allowed Q2ITL Switching of Q2 is forbidden Q7REL Switching of Q7 is allowed Q7ITL Switching of Q7 is forbidden Q51REL Switching of Q51 is allowed Q51ITL Switching of Q51 is forbidden Q52REL Switching of Q52 is allowed Q52ITL Switching of Q52 is forbidden Q8REL Switching of Q8 is allowed Q8ITL Switching of Q8 is forbidden Q1OPTR is 1 if Q1 is open Q1CLTR is 1 if Q1 is closed Q1Q2OPTR is 1 if Q1 or Q2 or both are open Q1Q2CLTR is 1 if Q1 and Q2 are closed Q2OPTR is 1 if Q2 is open Q2CLTR is 1 if Q2 is closed

5 Page 5 Q7OPTR Q7CLTR VPQ1TR VPQ2TR VPQ7TR VPQ1Q2TR is 1 if Q7 is open is 1 if Q7 is closed Switch status of Q1 is valid (open or closed) Switch status of Q2 is valid (open or closed) Switch status of Q7 is valid (open or closed) Switch status of Q1 and Q2 are valid (open or closed) Manufacturer ABB Automation Products AB Substation Automation Division SE Västerås Sweden Tel: +46 (0) Fax: +46 (0)