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