GE N60 Instruction Manual page 485

CHAPTER 5: SETTINGS
Digitizer to prepare the measured power for sending to the UR-2 IED, and
direct outputs to send the digitized power to the UR-2 IED
For UR-2:
Digitizer to prepare the measured power for adding to the remote power,
direct inputs to receive the remote power from the UR-1 IED,
eight-bit comparator to sum the power values and apply a threshold, and
user-definable display messages for telemetry (optional)
The maximum active power at the UR-1 location is:
The maximum active power at the UR-2 location is:
For the two power values to be subsequently added, a common base must be selected for digitization. For this example, an
arbitrary value of 1500 MW is selected as a base and maximum value for digitization. Consequently, one count of digitized
power at either location is worth 1500 MW / 127 = 11.811 MW (see the Digitizers section in this chapter for details).
For the Digitizer at UR-1
1. UR base unit for power given by P
2. The maximum power to be monitored (in pu) given by 1500 MW/690 MW = 2.174 pu.
3. Apply the following settings:
: "SRC 1 P" and
DIGITIZER 1 SOURCE
For the Digitizer at UR-2
1. UR base unit for power given by P
2. The maximum power to be monitored (in pu) given by 1500 MW/660 MW = 2.273 pu.
3. Apply the following settings:
: "SRC 4 P" and
DIGITIZER 1 SOURCE
For the Direct Outputs at UR-1
1. Assume that UR-1 IED is labeled as direct device 1 (
2. Assume that bits 1 to 8 are used for sending the required power to the UR-2 IED. Apply the following settings:
: "DIGITIZER 1 BIT 0"
DIRECT OUT 1 OPERAND
: "DIGITIZER 1 BIT 4"
DIRECT OUT 5 OPERAND
: "DIGITIZER 1 BIT 1"
DIRECT OUT 2 OPERAND
: "DIGITIZER 1 BIT 5"
DIRECT OUT 6 OPERAND
: "DIGITIZER 1 BIT 2"
DIRECT OUT 3 OPERAND
: "DIGITIZER 1 BIT 6"
DIRECT OUT 7 OPERAND
: "DIGITIZER 1 BIT 3"
DIRECT OUT 4 OPERAND
: "DIGITIZER 1 BIT 7"
DIRECT OUT 8 OPERAND
For the Direct Inputs at UR-2
1. Apply the following settings (direct inputs 10 through 17 are used) to receive the digitized power from the UR-1 IED:
DIRECT INPUT 10 DEVICE ID
DIRECT INPUT 10 BIT NUMBER
DIRECT INPUT 11 DEVICE ID
DIRECT INPUT 11 BIT NUMBER
DIRECT INPUT 12 DEVICE ID
DIRECT INPUT 12 BIT NUMBER
DIRECT INPUT 13 DEVICE ID
DIRECT INPUT 13 BIT NUMBER
DIRECT INPUT 14 DEVICE ID
DIRECT INPUT 14 BIT NUMBER
DIRECT INPUT 15 DEVICE ID
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
= 345 kV x 2 kA = 690 MW (see the FlexElements section for details).
BASE
= "2.174 pu"
DIGITIZER 1 LIMIT
= 220 kV x 3 kA = 660 MW (see the FlexElements section for details).
BASE
= "2.273 pu"
DIGITIZER 1 LIMIT
DIRECT OUTPUT DEVICE ID
: "1"
: "1"
: "1"
: "2"
: "1"
: "3"
: "1"
: "4"
: "1"
: "5"
: "1"
CONTROL ELEMENTS
= "1").
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