Efficiency Calcuate the load power out in MW. POUT = MW Calcuate the input power to the generator in MW. PIN = Calculate the overall efficiency of the sytem. n = % MW
Efficiency Calcuate the load power out in MW. POUT = MW Calcuate the input power to the generator in MW. PIN = Calculate the overall efficiency of the sytem. n = % MW
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.34P: Three single-phase, two-winding transformers, each rated 450MVA,20kV/288.7kV, with leakage reactance...
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Question
IL = 0.49 < -25.84° p.u
V1 = 0.14286< 41.99° p.u
V2 = 0.06897 < 33.09° p.u
V3 = 0.0353 < 30.47° p.u
V4 = 1< 0° p.u
![In the system shown in Figure 1, the transformers are connected star-star with both star points grounded and the generator is connected in
star with its star points grounded. The per unit impedances of each element on a 40 MVA base are given in Table 1 and the voltage levels are
given in Table 2.
Z [p.u.]
Generator
2
joi
0.01 + j0.08
L
Figure 1: A section of the distribution system
Transformer T1
Line
V BASE [KV]
0.04 + j
0.03 + j
0.15000000000000002 0.06000000000000000
Generator
Table 1: Sequence impedances (p.u. on 40 MVA base)
3
T2
181.
Line
3
10
Table 2: Voltage bases (kV)
Load
1
Transformer T2
0.04 + j
0.06000000000000000](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8fc51734-82dd-4efa-9682-8e5a93b8c4c2%2Fb0bfa51a-8063-4223-a47a-2e2742956e5b%2Fzhassm_processed.jpeg&w=3840&q=75)
Transcribed Image Text:In the system shown in Figure 1, the transformers are connected star-star with both star points grounded and the generator is connected in
star with its star points grounded. The per unit impedances of each element on a 40 MVA base are given in Table 1 and the voltage levels are
given in Table 2.
Z [p.u.]
Generator
2
joi
0.01 + j0.08
L
Figure 1: A section of the distribution system
Transformer T1
Line
V BASE [KV]
0.04 + j
0.03 + j
0.15000000000000002 0.06000000000000000
Generator
Table 1: Sequence impedances (p.u. on 40 MVA base)
3
T2
181.
Line
3
10
Table 2: Voltage bases (kV)
Load
1
Transformer T2
0.04 + j
0.06000000000000000
Transcribed Image Text:Efficiency
Calcuate the load power out in MW.
POUT =
MW
Calcuate the input power to the generator in MW.
PIN =
MW
Calculate the overall efficiency of the sytem.
n =
%
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