And today i use PV to calculate the Voltage THD，but i encountered a problem.I use the ieee34 test case to calculate the harmonic voltage,but the high order harmonic voltage is very very small compared to the the fundamental voltage,this is my result.But I use the same defined PV in the ieee37 test case,the high order harmonic voltage is not small,so the THD is larger than in the ieee34 case.
Below is part of my code:
I use the two test system to see the difference of harmonic voltage magnitude.The results are attached.
Now i have a question.what factors determine the high order harmonic voltage magnitude.In the two test systems,the load harmonic is ignored.only the PV produces harmonic voltage.And the PV defined the same.I just want to know why the high order voltage magnitude in the ieee34 test case so small.
Any help is appreciated!!!
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I use the following spectrum define the PV harmonic spectrum.
new spectrum.PV_test
~ Numharm=17
~ harmonic=(1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33)
~ %mag=(100, 40, 4, 4, 4, 2, 2, 2, 1.5, 1.5, 1.5, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6)
~ angle=(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
And today i use PV to calculate the Voltage THD，but i encountered a problem.I use the ieee34 test case to calculate the harmonic voltage,but the high order harmonic voltage is very very small compared to the the fundamental voltage,this is my result.But I use the same defined PV in the ieee37 test case,the high order harmonic voltage is not small,so the THD is larger than in the ieee34 case.
Below is part of my code:
PVDefined:
spectrum.defaultload.numharm=1
new spectrum.PV_test
~ Numharm=17
~ harmonic=(1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33)
~ %mag=(100, 40, 4, 4, 4, 2, 2, 2, 1.5, 1.5, 1.5, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6)
~ angle=(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
// PV SYSTEMS DEFINED
New PVSystem.PV1 phases=1 bus1=Mid806.2 kv=14.376 kva=90 IRRAD=1 PMPP=90 temperature=25 PF=1 effcurve=Myeff P-Tcurve=MyPvsT Daily=MyIrrad Tdaily=MyTemp %cutin=0 spectrum=PV_test
RunScript:
new monitor.PV1 PVSystem.PV1 1 mode=0
solve mode=snapshot
solve mode=daily
set hour=15 number=1
solve
set mode=harmonics Harmonics=(1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33)
solve
export monitor PV1
PVDefined:
spectrum.defaultload.numharm=1
new spectrum.PV_test
~ Numharm=17
~ harmonic=(1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33)
~ %mag=(100, 40, 4, 4, 4, 2, 2, 2, 1.5, 1.5, 1.5, 0.6, 0.6, 0.6, 0.6, 0.6, 0.6)
~ angle=(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
New PVSystem.PV1 phases=1 bus1=701.1.2 kv=4.800 kva=90 IRRAD=1 PMPP=90 temperature=25 PF=1 effcurve=Myeff P-Tcurve=MyPvsT Daily=MyIrrad Tdaily=MyTemp %cutin=0 spectrum=PV_test
RunScript:
new monitor.PV1 PVSystem.PV1 1 mode=0
solve mode=snapshot
solve mode=daily
set hour=15 number=1
solve
set mode=harmonics Harmonics=(1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33)
solve
export monitor PV1
I use the two test system to see the difference of harmonic voltage magnitude.The results are attached.
Now i have a question.what factors determine the high order harmonic voltage magnitude.In the two test systems,the load harmonic is ignored.only the PV produces harmonic voltage.And the PV defined the same.I just want to know why the high order voltage magnitude in the ieee34 test case so small.
Any help is appreciated!!!
ieee34 result
ieee37 result
so what??