Simulator 16 User Guide - PowerWorld

toolbar and then choosing the appropriate option for Build WECC Category B Standard
Monitors or Build WECC Category C Standard Monitors. Note that by default the WECC
Category B standard monitors are always inserted into a new power system case. The standards are
initially marked as Active = NO however so they must be set to Active = YES in order to use them.
The WECC Category B Standards create four transient limit monitors.
WECC Category B Voltage Dip for Non-Load Buses will monitor all non-load buses for any voltage
dip of 30% below the initial voltage value at any time.
WECC Category B Voltage Dip for Load Bus will monitor all load buses for a voltage dip of 25%
below the initial voltage at any time.
WECC Category B Voltage Dip for Load Bus Duration will monitor all load buses for a voltage dip of
20% below the initial voltage for a duration of 0.3333 seconds (20 cycles) and the dialog is shown
above.
WECC Category B Frequency will monitor all load buses for a frequency dip below 59.6 Hz for a
duration of 0.10 seconds (6 cycles) and the dialog is shown to the right as an example.
The WECC Category C Standards create three transient limit monitors.
WECC Category C Voltage Dip Any Bus will monitor all buses for a voltage dip of 30% below the
initial voltage at any time.
WECC Category C Voltage Dip Any Bus Duration will monitor all buses for a voltage dip of 20%
below the initial voltage for a duration of 0.6667 seconds (40 cycles).
WECC Category C Frequency will monitor all load buses for a frequency dip below 59.0 Hz for a
duration of 0.10 seconds (6 cycles).
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