2009-10-13 Steady State Power Systems Operations Review

# 2009-10-13 Steady State Power Systems Operations Review -...

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Steady State Power Systems Operations Review Jovan Ilić ECE 18-418 Fall 2009

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Problem 10-7 [1]
Per unit system base is 40MVA , 128kV in transmission line 1 Create per unit, per phase equivalent circuit of this system.

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        ,1 ,2 2 2 , 3, ,2 2 2 , ,2 ,2 ,3 ,2 40 13.8 13.8 128 12.8 138 138 12.8 4.096 40 128 128 409.6 40 13.8 13.8 138 base base base LL base base base base LL base base base base base S MVA kV kV V V kV kV kV kV V kV Z S MVA V kV V kV Z S MVA kV kV VV kV      2 2 , ,3 ,3 128 12.8 138 12.8 4.096 40 LL base base base kV kV kV V kV Z S MVA
        ,4 ,1 2 2 , ,4 ,4 3, ,5 ,3 2 2 , ,5 ,5 ,6 138 138 12.8 128 13.8 13.8 128 409.6 40 138 138 12.8 128 13.8 13.8 128 409.6 40 base base LL base base base base base LL base base base base kV kV V V kV kV kV kV V kV Z S MVA kV kV V V kV kV kV kV V kV Z S MVA V     ,4 2 2 , ,6 ,6 13.8 13.8 128 12.8 138 138 12.8 4.096 40 base LL base base base kV kV V kV kV kV kV V kV Z S MVA 

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          2 2 1 2 2 3 per-unit Z per-unit Z 13.8 40 0.03 0.8 0.0349 0.930 12.8 40 13.8 40 0.03 0.8 0.0697 1.860 12.8 20 13.8 0.03 1.0 12.8 given new new given new given G M M V S VS kV MVA Z j j pu kV MVA kV MVA Z j j pu kV MVA kV Zj kV           2 2 1 40 0.140 4.65 10 13.8 40 0.02 0.10 0.0465 0.233 12.8 20 T MVA j pu MVA kV MVA Z j j pu kV MVA
              1 2 3 1 2 3 4 5 6 10 50 0.0244 0.1221

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2009-10-13 Steady State Power Systems Operations Review -...

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