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N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
CONTROL ELEMENTS
CHAPTER 5: SETTINGS
5
DIRECT INPUT 15 BIT NUMBER
: “6”
DIRECT INPUT 16 DEVICE ID
: “1”
DIRECT INPUT 16 BIT NUMBER
: “7”
DIRECT INPUT 17 DEVICE ID
: “1”
DIRECT INPUT 17 BIT NUMBER
: “8”
2.
The remote power is available as the
DIRECT INPUT 10 On
(the least significant bit) through
DIRECT INPUT 16 On
(the most
significant bit) and
DIRECT INPUT 17 On
(the sign bit) FlexLogic operands.
For the 8-Bit Comparator at UR-2
1.
Remote power from UR-1 IED received on direct inputs is the first argument for the comparator. As such, apply the
following settings:
8 BIT COMP 1 ARG A0
: “DIRECT INPUT 1 On”
8 BIT COMP 1 ARG A4
: “DIRECT INPUT 5 On”
8 BIT COMP 1 ARG A1
: “DIRECT INPUT 2 On”
8 BIT COMP 1 ARG A5
: “DIRECT INPUT 6 On”
8 BIT COMP 1 ARG A2
: “DIRECT INPUT 3 On”
8 BIT COMP 1 ARG A6
: “DIRECT INPUT 7 On”
8 BIT COMP 1 ARG A3
: “DIRECT INPUT 4 On”
8 BIT COMP 1 ARG A7
: “DIRECT INPUT 8 On”
2.
Local power from the UR-2 IED available internally is the second argument for the comparator. Thus, apply the
following settings:
8 BIT COMP 1 ARG B0
: “DIGITIZER 1 BIT 0”
8 BIT COMP 1 ARG B4
: “DIGITIZER 1 BIT 4”
8 BIT COMP 1 ARG B1
: “DIGITIZER 1 BIT 1”
8 BIT COMP 1 ARG B5
: “DIGITIZER 1 BIT 5”
8 BIT COMP 1 ARG B2
: “DIGITIZER 1 BIT 2”
8 BIT COMP 1 ARG B6
: “DIGITIZER 1 BIT 6”
8 BIT COMP 1 ARG B3
: “DIGITIZER 1 BIT 3”
8 BIT COMP 1 ARG B7
: “DIGITIZER 1 BIT 7”
3.
The two power values are to be added, therefore set
8BIT COMP 1 ADD/SUB
to “On”.
4.
To establish the alarm when the total power in either direction (import or export) is above the threshold, set
8BIT COMP
1 INPUT MODE
to “Absolute.”
5.
To establish the alarm when the total power is above the threshold, set the
8BIT COMP 1 DIRECTION
to “Over.”
6.
The digitized power values are scaled to meaningful values. Assuming that MW are to be used for comparison and
display, set
8BIT COMP 1 SCALE FACTOR
to “11.81”. In this way, the
8BIT COMP 1 A
,
8BIT COMP 1 B
, and
8BIT COMP 1 Out
actual values represent the remote (UR-1), local (UR-2), and total power values in MW.
7.
To set the alarm when the total power is greater than 2500 MW, set
8BIT COMP 1 PICKUP
to “2500.00”.
8.
To clear the alarm when the total power is less than 2000 MW, the hysteresis setting needs to be at 2500 – 2000 = 500
MW. So set
8BIT COMP 1 HYSTERESIS
to “500”.
9.
Using the timing requirements, set
8BIT COMP 1 PICKUP DELAY
to “0.050” and
8BIT COMP 1 RESET DELAY
to “1.000”. Use
the
8BIT COMP 1 OP
FlexLogic operand to set the alarm.
10. For monitoring and telemetry purposes, the digitized power values need to be scaled to meaningful values. Assuming
MW to be displayed, set
8BIT COMP 1 SCALE FACTOR
to “11.81”. In this way, the actual values
8BIT COMP 1 A
,
8BIT COMP 1
B
and
8BIT COMP 1 Out
represent the remote (UR-1), local (UR-2), and total power values in MW.
For the User-definable displays at UR-2 (optional)
To display the remote and total power values the following screen can be set up:
DISP 1 TOP LINE
: “REMOTE MW: ~”
DISP 1 BOTTOM LINE
: “TOTAL MW: ~”
DISP 1 ITEM 1
: “8100” (Modbus register address of
8BIT COMP 1 A
)
DISP 1 ITEM 2
: “8104” (Modbus register address of
8BIT COMP 1 Out
)