Wind Turbine Modeling - PowerWorld

Complex Load Example
• In the PowerWorld CLOD model, under-voltage motor tripping may be
set by the following parameters
– Vi = voltage at which trip will occur (default = 0.75 pu)
– Ti (cycles) = length of time voltage needs to be below Vi before trip will occur
• In the example, under voltage trips occurred at bus 5 and bus 8 when
the fault clearing time was increased to 1.155
• Verify that increasing the clearing time further to 1.2 causes additional
under-voltage trips of loads at buses 6, and an over-frequency trip of
Generator 2
Mechanical Power (MW)
160
150
140
130
120
110
100
90
80
70
60
50
40
30
20
0
1
2
3
cleared at 1.155 seconds
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Time (Seconds)
Generator
Pmech
Mechanical Power (MW)
160
140
120
100
80
60
40
20
0
0
1
2
3
4
cleared at 1.2 seconds
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Time (Seconds)
20
Mech Input_Gen Bus 2 #1 Mech Input_Gen Bus 3 #1 Mech Input_Gen Bus1 #1
Mech Input_Gen Bus 2 #1 Mech Input_Gen Bus 3 #1 Mech Input_Gen Bus1 #1
T12: Wind Turbine
© 2012 PowerWorld Corporation
wscc_9bus_Type3WTG_CLOD
20