Copy_of_lab_9_Wye-Wye_Transformer_Lab
docx
keyboard_arrow_up
School
Georgian College *
*We aren’t endorsed by this school
Course
2014
Subject
Electrical Engineering
Date
Feb 20, 2024
Type
docx
Pages
6
Uploaded by CoachScienceStork25
Lab 9
ELEC 2023 - Power Transmission and Distribution 1
Lab #8 - Wye Wye Transformer
Thando Ncube (200537131), Zakrallah Shaker (200525699) Georgian College ELEC - 2023 Power Transmission and Dist Instructor: John Miller Date: November 17, 2023 In conformance with Section 8 of the Georgian College Academic Policies and Procedures the author(s) confirm that
this work submitted for assessment is solely their work and is expressed in their own words. Any uses made within it
of the works of any other author, in any form (ideas, equations, figures, texts, tables, programs, etc.), are properly
acknowledged at the point of use. A list of the references used is include
pg. 1
Lab 9
ELEC 2023 - Power Transmission and Distribution 1
Equipment:
-
LabVolt AC Power Supply
-
Three Hammond Single Phase 300VA Transformers
-
LabVolt Data Acquisition and Control Interface
-
LabVolt Resistive Load Module
-
Computer with LVDAM-EMS software
Procedure:
1.
For TEST 1 connect the equipment as shown on the attached diagram. (All load switches OFF) Apply V
PRI
= 120V (line to neutral)
and record all quantities. 2.
For TEST 2 connect full resistive load ust the load resistance as shown in the table and repeat the measurement(all switches ON) and repeat the measurements.
3.
For TEST 3 adjnts.
4.
For TEST 4 remove the neutral connection between the load resistors and the transformer secondary windings. Record the currents and the voltages at the transformer
.
5.
For TEST 5 repeat TEST 4, but measure the voltages at the load resistors
.
For the lab report:
1.
Plot all primary and secondary voltage vectors for TEST 1. Use a scale to keep it proportional. Hand drawn with ruler is acceptable if neat.
2.
Discuss the relationship between line to line and phase (line to neutral) voltages, and
between line current and phase current in a wye-connected system. 3.
Calculate the secondary power for each phase and add to get the total for TEST 2.
Remember, power = IV/
√
❑
to correct for line to line voltage. The load only sees
line to neutral voltage, not the full line to line voltage
.
4.
Calculate the secondary neutral current for TEST 3 (magnitude and phase angle-
hint-add all phase currents with angles). ADD UP ALL CURRENT AND PHASE ANGLE
5.
On a single diagram, plot all secondary voltage vectors for TESTS 4 & 5. 6.
From your plot, estimate (approximate) the neutral voltage offset in TEST 5, i.e. where would the 0v centre appear to be?
7.
Discuss possible negative impacts of losing the neutral connection in a 4-wire wye
circuit. pg. 2
Lab 9
ELEC 2023 - Power Transmission and Distribution 1
4 remove the
neutral connection between the load resistors and the transformer secondary windings. Record
the currents and the voltages at the transformer
.
pg. 3
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
Lab 9
ELEC 2023 - Power Transmission and Distribution 1
WYE-WYE TRANSFORMER LAB
PRIMARY
SECONDARY
V
A-N
V
B-N
V
C-N
V
A-B
V
B-C
V
C-A
V
a-n
V
b-n
V
c-n
V
a-b
V
b-c
V
c-a
I
a
I
b
I
c
TEST
1
121.1 120.
7 121.
7 209.1 210.1 210.4 89.15
88.91
89.75 154.2
154.
9
155.3
0
0 0 TEST
2
121.1
121
121.
9 209.5 210.6 210.6 88.63 88.38
89.32
153.8
154
154.2
0.519
0.516 .052
1 TEST
3
121.4
121.
2 122.
1 209.8 210.8 210.6 88.61 88.38
89.62 153.1 154.2 154.4 0.519
0.449 0.30
4 TEST
4
88.73
88.44
89.54 153.1 154.3 154.3 0.465 0.440 0.34
7 TEST
5
79.20
86.27
102.1 152.8
154 154.1 0.465 0.439 0.34
6 Red
Black
Blue
1200
600
300
1200
600
300
1200
600
300
TEST
1
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
TEST
2
ON
ON
ON
ON
ON
ON
ON
ON
ON
TEST
3
ON
ON
ON
OFF
ON
ON
OFF
OFF
ON
TEST
4
ON
ON
ON
OFF
ON
ON
OFF
OFF
ON
TEST
5
ON
ON
ON
OFF
ON
ON
OFF
OFF
ON
pg. 4
Lab 9
ELEC 2023 - Power Transmission and Distribution 1
1)
2)
With no line from neutral to load resistors the voltage values are distributed unevenly . When voltage is found in neutral,
values balance out
3)
P=V*I P= 88.38 * 0.519 = 45.87 * 3 = 137.61
4)
0.519<0 + 0.449<120 + 0.304<240 = 0.189<41.39
pg. 5
Lab 9
ELEC 2023 - Power Transmission and Distribution 1
5)
6)
The 0V centre would most likely be in the line to line voltage
7)
The negative impact of losing the neutral connection of the 4 wire circuit can include losing balance of voltage distribution of
the three phases, and possible damage to sensitive equipment
pg. 6
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
- Access to all documents
- Unlimited textbook solutions
- 24/7 expert homework help
Related Documents
Related Questions
Full calculation with any assumption needed. All sub questions please as it is all related.
arrow_forward
Find the following :
1.Ripple Voltage (vpp)
2. Zero-to peak ripple(Vop)
3.secondary winding of the transformer high line and low line
arrow_forward
Please answer question number 4 thank you
arrow_forward
A 100 KVA, 2000/200V 1-phase 2-winding Transformer is to be used as an auto
transformer for stepping up the voltage from 2000 V to 2200 V. At rated load, the
2-winding Transformer has 2.5% loss, 3% voltage regulation & 4% impedance for an auto
transformer determine
(a) Voltage & current rating
(b) KVA rating
(c) Effiiency
(d) Percentage impedance
(c) Voltage regulation
(f) Short circuit current on each side.
arrow_forward
Analyse several voltage and current situations in different loading scenarios in a simplified radial (transformer to consumption) medium-voltage power system example. There are only 2 nodes in the 35 kV line – node 0 from the 110/35 kV and node 1 with one consumer. The physical characteristics of the line and the loading scenarios are individualized for each student – please see the attached file Excel “WM9P3 Task1 data” for your particular data set.
Briefly reflect on the complexity of the calculations for known input or output voltage, as well as for fixed or voltage-dependent consumption in this simple power system model.
Analyse and discuss the sensitivity of the voltage drop [in % of amplitude and the degrees of phase] with respect to the current level [in %] and to the power factor.
arrow_forward
Identify the power system component
represented by the given symbol.
BE
O potential transformer
O Circuit breaker
O Lightning arrester
O current transformer
arrow_forward
A short transmission line connects a step-up transformer on the source side with a series impedance of j0.5 ohms (referred to the primary) to a step-down transformer on the load side with a series impedance of 50 ohms (referred to the primary). The turn ratio of the step-up transformer is 1:10 and a no-load primary voltage of 23 (line-to-line) kV. The step-down transformer has a turn ratio of 35:2 and it has a Y-connected, balanced load of 0.490 +j 0.0816 ohms connected to its secondary side. Assuming an ideal transmission line, compute the load voltage (line-to-neutral).
arrow_forward
Do it in 5 minutes i wil give u like for sure
arrow_forward
A short transmission line connects a step-up transformer on the source side with a series impedance of j0.5 ohms (referred to the primary) to a step-down transformer on the load side with a series impedance of 50 ohms (referred to the primary). The turn ratio of the step-up transformer is 1:14 and a no-load primary voltage of 17 (line-to-line) kV. The step-down transformer has a turn ratio of 18:1 and it has a Y-connected, balanced load of 0.463 +j 0.0772 ohms connected to its secondary side. Assuming an ideal transmission line, the real power absorbed by the load would be:
A.
42 MW
B.
None of the other choices are correct
C.
54 MW
D.
37.4 MW
E.
28 MW
arrow_forward
A short transmission line connects a step-up transformer on the source side with a series impedance of j0.5 ohms
(referred to the primary) to a step-down transformer on the load side with a series impedance of 50 ohms (referred to the
primary). The turn ratio of the step-up transformer is 1:14 and a no-load primary voltage of 17 (line-to-line) kV. The step-
down transformer has a turn ratio of 18:1 and it has a Y-connected, balanced load of 0.463 +j 0.0772 ohms connected
to its secondary side.
A capacitor bank of -j0.324 ohms is added parallel to the load. Assuming an ideal transmission line, the effective
impedance (per phase) of the system seen by the source would be:
O A. 0.292 + j0.375
O B. None of the other choices are correct
O C. 0.584 + j0.750
O D.0.196 + j0.158
O E. 5.84 + j7.5
arrow_forward
SEE MORE QUESTIONS
Recommended textbooks for you
Power System Analysis and Design (MindTap Course ...
Electrical Engineering
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:Cengage Learning
Related Questions
- Full calculation with any assumption needed. All sub questions please as it is all related.arrow_forwardFind the following : 1.Ripple Voltage (vpp) 2. Zero-to peak ripple(Vop) 3.secondary winding of the transformer high line and low linearrow_forwardPlease answer question number 4 thank youarrow_forward
- A 100 KVA, 2000/200V 1-phase 2-winding Transformer is to be used as an auto transformer for stepping up the voltage from 2000 V to 2200 V. At rated load, the 2-winding Transformer has 2.5% loss, 3% voltage regulation & 4% impedance for an auto transformer determine (a) Voltage & current rating (b) KVA rating (c) Effiiency (d) Percentage impedance (c) Voltage regulation (f) Short circuit current on each side.arrow_forwardAnalyse several voltage and current situations in different loading scenarios in a simplified radial (transformer to consumption) medium-voltage power system example. There are only 2 nodes in the 35 kV line – node 0 from the 110/35 kV and node 1 with one consumer. The physical characteristics of the line and the loading scenarios are individualized for each student – please see the attached file Excel “WM9P3 Task1 data” for your particular data set. Briefly reflect on the complexity of the calculations for known input or output voltage, as well as for fixed or voltage-dependent consumption in this simple power system model. Analyse and discuss the sensitivity of the voltage drop [in % of amplitude and the degrees of phase] with respect to the current level [in %] and to the power factor.arrow_forwardIdentify the power system component represented by the given symbol. BE O potential transformer O Circuit breaker O Lightning arrester O current transformerarrow_forward
- A short transmission line connects a step-up transformer on the source side with a series impedance of j0.5 ohms (referred to the primary) to a step-down transformer on the load side with a series impedance of 50 ohms (referred to the primary). The turn ratio of the step-up transformer is 1:10 and a no-load primary voltage of 23 (line-to-line) kV. The step-down transformer has a turn ratio of 35:2 and it has a Y-connected, balanced load of 0.490 +j 0.0816 ohms connected to its secondary side. Assuming an ideal transmission line, compute the load voltage (line-to-neutral).arrow_forwardDo it in 5 minutes i wil give u like for surearrow_forwardA short transmission line connects a step-up transformer on the source side with a series impedance of j0.5 ohms (referred to the primary) to a step-down transformer on the load side with a series impedance of 50 ohms (referred to the primary). The turn ratio of the step-up transformer is 1:14 and a no-load primary voltage of 17 (line-to-line) kV. The step-down transformer has a turn ratio of 18:1 and it has a Y-connected, balanced load of 0.463 +j 0.0772 ohms connected to its secondary side. Assuming an ideal transmission line, the real power absorbed by the load would be: A. 42 MW B. None of the other choices are correct C. 54 MW D. 37.4 MW E. 28 MWarrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
- Power System Analysis and Design (MindTap Course ...Electrical EngineeringISBN:9781305632134Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. SarmaPublisher:Cengage Learning
Power System Analysis and Design (MindTap Course ...
Electrical Engineering
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:Cengage Learning