5-222 N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUALCONTROL ELEMENTS CHAPTER 5: SETTINGS5Digitizer 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, anduser-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, anarbitrary value of 1500 MW is selected as a base and maximum value for digitization. Consequently, one count of digitizedpower 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-11. UR base unit for power given by (see the FlexElements section for details).2. The maximum power to be monitored (in pu) given by .3. Apply the following settings:DIGITIZER 1 SOURCE: “SRC 1 P” and DIGITIZER 1 LIMIT = “2.174 pu”For the Digitizer at UR-21. UR base unit for power given by (see the FlexElements section for details).2. The maximum power to be monitored (in pu) given by .3. Apply the following settings:DIGITIZER 1 SOURCE: “SRC 4 P” and DIGITIZER 1 LIMIT = “2.273 pu”For the Direct Outputs at UR-11. Assume that UR-1 IED is labeled as direct device 1 (DIRECT OUTPUT DEVICE ID = “1”).2. Assume that bits 1 to 8 are used for sending the required power to the UR-2 IED. Apply the following settings:DIRECT OUT 1 OPERAND: “DIGITIZER 1 BIT 0”DIRECT OUT 5 OPERAND: “DIGITIZER 1 BIT 4”DIRECT OUT 2 OPERAND: “DIGITIZER 1 BIT 1”DIRECT OUT 6 OPERAND: “DIGITIZER 1 BIT 5”DIRECT OUT 3 OPERAND: “DIGITIZER 1 BIT 2”DIRECT OUT 7 OPERAND: “DIGITIZER 1 BIT 6”DIRECT OUT 4 OPERAND: “DIGITIZER 1 BIT 3”DIRECT OUT 8 OPERAND: “DIGITIZER 1 BIT 7”For the Direct Inputs at UR-21. 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: “1”DIRECT INPUT 10 BIT NUMBER: “1”DIRECT INPUT 11 DEVICE ID: “1”DIRECT INPUT 11 BIT NUMBER: “2”DIRECT INPUT 12 DEVICE ID: “1”DIRECT INPUT 12 BIT NUMBER: “3”DIRECT INPUT 13 DEVICE ID: “1”DIRECT INPUT 13 BIT NUMBER: “4”DIRECT INPUT 14 DEVICE ID: “1”DIRECT INPUT 14 BIT NUMBER: “5”DIRECT INPUT 15 DEVICE ID: “1”DIRECT INPUT 15 BIT NUMBER: “6”DIRECT INPUT 16 DEVICE ID: “1”P 3 345 kV 1.25 1.8 kA 1.0 1345 MW= =P 3 220 kV 1.25 2.5 kA 1.0 1191 MW= =P BASE 345 kV 2 kA 690 MW= =1500 MW 690 MW 2.174 pu=P BASE 220 kV 3 kA 660 MW= =1500 MW 660 MW 2.273 pu=
