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ANALISIS SISTEM TENAGA
Kuliah 01
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Phasor Notation Sinyal tegangan dan arus pada sistem tenaga diasumsikan Sinusoidal murni,sehingga dapat dimodelkan dengan Notasi Phasor Euler Identity
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Tegangan =
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Arus= Lagging current
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Arus= Leading current
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Single Subscript Notation
+ + IL Vt VL - -
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Double Subscript Notation
+ + IL Vt VL - -
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Single Phase Active Power
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Complex Power & Power Factor
Q(VAR) S (VA) P (watt)
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S (VA) Q(VAR) P (watt)
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Q2 bernilai negatif sehingga arahnya berlawanan
P2 Q2 S2 Q1 S1 SResultan P1 Q2 bernilai negatif sehingga arahnya berlawanan Apakah SResultan = S1 + S2 ???
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S2 Q2 P2 Sresultan S1 P1 Q1
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Direction of Power Flow
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Sign Convention
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Passive Sign Convention
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Direction of Power Flow
Jika PL> 0, maka ZLmenyerap Daya Real Jika PL< 0, maka ZL mensuplai Daya Real Jika QL> 0, maka ZLmenyerap Daya Reaktif Jika QL< 0, maka ZL mensuplai Daya Reaktif
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Power Characteristic
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Example Describe power flow direction ! Which one is generator/motor ?
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3 Phase Circuit Ia 0,n In Ib Ic
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“a” Operator
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a-a2 -a2 a Vcn a-1 1-a2 1,a3 -1,-a3 Van a2-1 1-a Vbn a2 -a a2-a
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Exercise
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