5-176 N60 Network Stability and Synchrophasor Measurement System GE Multilin5.7 CONTROL ELEMENTS 5 SETTINGS5For 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,8-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 (refer to the Digitizers section in this chapter for details).For the Digitizer at UR-1:1. UR base unit for power given by (refer to the FlexElements™ section for details).2. The maximum power to be monitored (in pu) given by .3. The following settings should be applied:DIGITIZER 1 SOURCE: “SRC 1 P” and DIGITIZER 1 LIMIT = “2.174 pu”For the Digitizer at UR-2:1. UR base unit for power given by (refer to the FlexElements™ section for details).2. The maximum power to be monitored (in pu) given by .3. The following settings should be applied:DIGITIZER 1 SOURCE: “SRC 4 P” and DIGITIZER 1 LIMIT = “2.273 pu”For the Direct Outputs at UR-1:1. Assume the UR-1 IED is labeled as direct device 1 (DIRECT OUTPUT DEVICE ID = “1”).2. Assume bits 1 to 8 are used for sending the required power to the UR-2 IED. The following settings should be applied: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-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: “ 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 ” DIRECT INPUT 16 BIT NUMBER: “ 7 ”DIRECT INPUT 17 DEVICE ID: “ 1 ” DIRECT INPUT 17 BIT NUMBER: “ 8 ”2. The remote power will be 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, the followingsettings should be applied: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, the following set-tings should be applied: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=
