Peter Z

Dear all, I am using the IEEE 123 system combined with time sequence load shape. I want to observe the voltege that OLTC 1 (150~150r) is regulating. However, the volatge is amost not changing for a while. I think it shound be time changing with the load shape. Can anyone kindly answer the question why the voltage amost doesn't change. I think it should be in the boundary of 2460+/-20. I am still confused why from time 7 to 8, the OLTC tap changed, and the voltage of node 150r changed from 2461.81...

Dear all, I am using the IEEE 123 system combined with time sequence load shape. I want to observe the voltege that OLTC 1 (150~150r) is regulating. However, the volatge is amost not changing for a while. I think it shound be time changing with the load shape. Can anyone kindly answer the question why the voltage amost doesn't change. I think it should be in the boundary of 2460+/-20. Here is the code and the output file. Thanks very much. OLTC: new transformer.reg1a phases=3 windings=2 buses=[150...

Dear all, I am using the IEEE 123 system combined with time sequence load shape. I want to observe the voltege that OLTC 1 (150~150r) is regulating. However, the volatge is amost not changing for a while. I think it shound be time changing with the load shape. Can anyone kindly answer the question why the voltage amost doesn't change. I think it should be in the boundary of 2460+/-20. Here is the code and the output file. Thanks very much. OLTC: new transformer.reg1a phases=3 windings=2 buses=[150...

Hi Roger, Thanks very much. U do really help me alot. Best, Peter

Hi Roger, Thank you for your reply. I got the export data now. Nice tool. But the volatge is around 2460 V instead of 2400V. For the IEEE 123 test cases, can you kindly tell me which is the voltage that the OLTC is regulating. I think The OLTC is regulating the voltage of bus 150, which is the transformer winding. The regulated voltage must be in the boundary of 2380~2420. , am I right? I don't know why I get the voltage aound 2460 V. I list part code here. new transformer.reg1a phases=3 windings=2...

Hi all, Right now I am studing the IEEE 123 system with 1440 time slots loadfile. I want to observe the volatge that the OLTC is regulating. Here is the setting of the transformer and the OLTC. I think The OLTC is regulating the voltage of bus 150, The regulated voltage must be in the boundary of 2380~2420. , am I right? new transformer.reg1a phases=3 windings=2 buses=[150 150r] conns=[wye wye] kvs=[4.16 4.16] kvas=[5000 5000] XHL=.001 %LoadLoss=0.00001 ppm=0.0 new regcontrol.creg1a transformer=reg1a...

Hi all, Right now I am studing the IEEE 123 system with 1440 time slots loadfile. I want to observe the volatge that the OLTC is regulating. Here is the setting of the transformer and the OLTC. I think The OLTC is regulating the voltage of bus 150, am I right? new transformer.reg1a phases=3 windings=2 buses=[150 150r] conns=[wye wye] kvs=[4.16 4.16] kvas=[5000 5000] XHL=.001 %LoadLoss=0.00001 ppm=0.0 new regcontrol.creg1a transformer=reg1a winding=2 vreg=120 band=2 ptratio=20 ctprim=700 R=3 X=7.5...

Hi Davis, I have a question. the defination of band is bandwith in VOLTS for the controlled bus (see help for ptratio property). Default is 3.0. In my simulation, the coding is : new regcontrol.creg2a transformer=reg2a winding=2 vreg=120 band=2 ptratio=20 ctprim=50 R=0.4 X=0.4 I am wodering the bandwith 2 is the bandwith of 120V or 120*20=2400V? which is the controlled bus? Thanks, Lizhi