 Home
 Products
 Integration
 Tutorial
 Barcode FAQ
 Purchase
 Company
zxing barcode reader java download S 800 kVA = = 100 A V 8 kV in Software
S 800 kVA = = 100 A V 8 kV PDF417 2d Barcode Creation In None Using Barcode creator for Software Control to generate, create PDF417 2d barcode image in Software applications. PDF 417 Decoder In None Using Barcode decoder for Software Control to read, scan read, scan image in Software applications. (a) If we assume that the voltage at the load is arbitrarily assigned to be at 0 phase, and the power factor of the load is 09 lagging, the phasor current flowing to the load is I = 100 258 A The voltage at the sending end of the transmission line is then PDF417 Generator In C#.NET Using Barcode printer for .NET Control to generate, create PDF417 image in .NET framework applications. PDF 417 Drawer In .NET Using Barcode maker for ASP.NET Control to generate, create PDF 417 image in ASP.NET applications. VS = VR + ZI VS = 8000 0 V + ( 21 + j 323 )(100 258 A ) VS = 10000 164 V
PDF417 Generation In .NET Using Barcode maker for Visual Studio .NET Control to generate, create PDF417 image in Visual Studio .NET applications. PDF417 Generation In Visual Basic .NET Using Barcode encoder for .NET Control to generate, create PDF417 image in .NET framework applications. (b) The complex output power from the transmission line is
Painting Barcode In None Using Barcode drawer for Software Control to generate, create barcode image in Software applications. GS1 128 Drawer In None Using Barcode generation for Software Control to generate, create UCC  12 image in Software applications. SOUT = VR I* = ( 8000 0 V )(100 258 A ) = 800,000 258 VA
Making Code 128 Code Set C In None Using Barcode generation for Software Control to generate, create Code 128B image in Software applications. Code 3 Of 9 Generation In None Using Barcode creation for Software Control to generate, create ANSI/AIM Code 39 image in Software applications. Therefore the output power is
Drawing EAN13 In None Using Barcode creator for Software Control to generate, create EAN 13 image in Software applications. Generating UCC  12 In None Using Barcode generation for Software Control to generate, create UPC A image in Software applications. POUT = 800 cos 258 = 720 kW
Planet Generation In None Using Barcode drawer for Software Control to generate, create USPS Confirm Service Barcode image in Software applications. Make Bar Code In None Using Barcode generator for Online Control to generate, create bar code image in Online applications. The complex input power to the transmission line is
Code 128 Code Set C Generator In Java Using Barcode generator for Java Control to generate, create USS Code 128 image in Java applications. UPC Symbol Generator In Java Using Barcode generator for Java Control to generate, create GS1  12 image in Java applications. S IN = VS I* = (10000 164 V )(100 258 A ) = 1,000,000 422 VA
GTIN  128 Printer In .NET Using Barcode generator for Reporting Service Control to generate, create UCC.EAN  128 image in Reporting Service applications. Reading Code 39 Extended In Visual C# Using Barcode reader for .NET framework Control to read, scan read, scan image in .NET framework applications. Therefore the input power is
Scan EAN13 In None Using Barcode reader for Software Control to read, scan read, scan image in Software applications. Matrix Barcode Generator In Visual Basic .NET Using Barcode creation for VS .NET Control to generate, create Matrix Barcode image in Visual Studio .NET applications. PIN = 1000 cos 422 = 741 kW
The resulting efficiency is
POUT 720 kW 100% = 100% = 972% PIN 741 kW
The voltage regulation of the transmission line is
VR =
VS VR 10000 8000 100% = 100% = 25% VR 8000
Problems 98 through 910 refer to a single phase, 8 kV, 50Hz, 50 kmlong underground cable consisting of two aluminum conductors with a 3 cm diameter separated by a spacing of 15 cm 98 The singlephase transmission line referred to in Problems 93 through 97 is to be replaced by an underground cable The cable consists of two aluminum conductors with a 3 cm diameter, separated by a centertocenter spacing of 15 cm As before, assume that the 50 Hz ac resistance of the line is 5% greater than its dc resistance, and calculate the series impedance and shunt admittance of the line in ohms per km and siemens per km Also, calculate the total impedance and admittance for the entire line SOLUTION The series inductance per meter of this transmission line is given by Equation (922) 1 D + ln H/m 4 r
(922) where = 0 = 4 10 7 H/m
0 1 015 m 4 10 7 H/m 1 015 m 6 l= + ln = + ln = 1021 10 H/m 4 4 0015 m 0015 m Therefore the inductance of this transmission line will be
L = 1021 10 6 H/m ( 50,000 m ) = 00511 H X = j L = j 2 fL = j 2 ( 50 Hz )( 00511 H ) = j1605
The inductive reactance of this transmission line is
The resistance of this transmission line is the same as for the overhead transmission line calculated previously: RAC = 21 The total series impedance of this entire line would be Z = 21 + j1605 , so the impedance per kilometer would be Z = ( 21 + j1605 ) / ( 50 km ) = 0042 + j 0321 /km c=
The shunt capacitance per meter of this transmission line is given by Equation (941) ( 8854 10 12 F/m ) 015 ln 0015
D ln r
(941) = 121 10 11 F/m
Therefore the capacitance per kilometer will be The shunt admittance of this transmission line per kilometer will be c = 121 10 8 F/km
y sh = j 2 fc = j 2 ( 50 Hz ) 121 10 8 F/km = j 380 10 6 S/km
Therefore the total shunt admittance will be
Ysh = j 380 10 6 S/km ( 50 km ) = j190 10 4 S
99 The underground cable is operating with the receiving side of the line opencircuited The sending end voltage is 8 kV at 50 Hz How much charging current is flowing in the line How does this charging current in the cable compare to the charging current of the overhead transmission line 181 SOLUTION Although this line is in the short range of lengths, we will treat it as a mediumlength line, because we must include the capacitances if we wish to calculate charging currents The appropriate transmission line model is shown below The charging current can be calculated by opencircuiting the output of the transmission line and calculating I S : IS =
IS =
YVS VS + 1 2 Z+ Y /2 j190 10 4 S ( 8000 0 V ) 8000 0 V ( 21 + j 323 ) +
1 j190 10 4 S / 2 I S = 0760 90 A + 0762 90 A = 1522 90 A
Since the shunt admittance of the underground cable is more than twice as large as shunt admittance of the overhead transmission line, the charging current of the underground cable is more than twice as large 910 The underground cable is now supplying 8 kV to an 800 kVA, 09 PF lagging singlephase load (a) What is the sending end voltage and current of this transmission line (b) What is the efficiency of the transmission line under these conditions (c) What is the voltage regulation of the transmission line under these conditions SOLUTION At 50 km length, we can treat this transmission line as a short line and ignore the effects of the shunt admittance (Note, however, that this assumption is not as good as it was for the overhead transmission line The higher shunt admittance makes its effects harder to ignore) The transmission line is supplying a voltage of 8 kV at the load, so the magnitude of the current flowing to the load is

