EEE30002-电力系统代写
时间:2023-04-13
Swinburne University of Technology EEE30002
Faculty of Science, Engineering and Technology Electrical Power Systems
Test 1, Semester 1 – 2022 Page 1 of 2
Test 1 Questions
Please Read Very Carefully the Instructions Below
• Your ID, Declaration and Signature
You must include the following student information (typed or handwritten) on the font page
of your answer manuscript of A4 size papers and sign it.
Student ID: Surname: Given Name:
I declare that the answers to this Test are my individual and independent work.
STUDENT SIGNATURE: DATE:
• Your Answers
You must answer questions independently without discussion with any other people.
You must number and sign on every page of your answer manuscript.
This Test is worth 25% of overall EEE30002 assessment. It contains ONE (1) question with
FIVE (5) sub-questions a) – e).
Attempt ALL Sub-question a) – e).
Workings and answers must be CLEARLY HANDWRITTEN on A4 size papers and include
necessary technical analyses and numerical calculations for the solutions. An answer without
supporting analysis and calculation may not be awarded marks. Unclear writings are not
accepted.
• Your Submission
Scan or photo your answer manuscript into a SINGLE PDF FILE and use your STUDENT
ID AS THE FILE NAME.
Submit the file in Canvas/Assignments/Test 1 before/by the due time indicated there.
You are not able to submit after the time stated above!
Email submission is not accepted!
Swinburne University of Technology EEE30002
Faculty of Science, Engineering and Technology Electrical Power Systems
Test 1, Semester 1 – 2022 Page 2 of 2
Question 1 [25 marks]
In Fig. 1 below, the Y connected synchronous generator (SG) has internal reactance XS = 0.2 Ω per phase,
the ∆/Y connected 3-phase transformer bank is made up of three identical single-phase transformers, each
with internal reactance XT = 0.48 Ω (on the low-voltage side), negligible resistance and magnetizing
current, and turn ratio N2/N1 = 5. The transformer bank is delivering 50 MW at 0.8 PF lagging to a
substation bus with bus voltage 115 kV.
Fig. 1
Use the line-to-neutral voltage at the bus as the reference. Account for the phase shift. Determine
a) the three-phase complex power supplied by the generator and power factor, [12 marks]
b) the generator internal voltage, [4 marks]
c) the equation for the three-phase active electric power delivered by the SG versus its power
(torque) angle δ (in numerical form, not symbolic form), and [3 marks]
d) the power angle δ at which the SG delivers the electric power. [4 marks]
e) What does the power (torque) angle δ represent in the equivalent circuit? [2 marks]
• This paper contains 5 questions and a total of 25 pages.
Y connected
Synchronous
Generator
XS = 0.2 Ω
∆/Y step-up
transformer bank
N2/N1 = 5
XT = 0.48 Ω
115 kV substation bus
P = 50MW
pf = 0.8
essay、essay代写