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Analysis Techniques for Large Scale Power Systems (EEE80012) Assignment

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Analysis Techniques for Large Scale Power Systems (EEE80012)
Assignment
Instruction
 This assignment is 15% of the total assessment of the unit.
 Solve Assignment Problems 1-11 below.
 The allocation of marks is shown in brackets at the end of each part of each problem. The
total 100 marks will be scaled to 15% in the final assessment.
 See Lab 0 and Lab 2-Preliminary in Learning Material/ Lab Materials in Blackboard
for related learning material and the outlines on how to use PSSE to perform the simulation
tasks.
 Please write down your solutions clearly using pen NOT pencil and scan them to a pdf file.
You can also type your solutions and save as pdf file if you wish. For the simulation part you
need to attach the snap shot of the results in your pdf file.
 Submit the pdf file through Assignment Submission in Blackboard
 Due date: As shown in Assignment Submission in Blackboard.
To submit assignment: log on to the unit Blackboard, click on ‘Assessment’ on the left column, and
then click on ‘Assignment’ on the main panel to find Assignment Submission link. You may upload
your assignment as many times as you want, the last upload before the submission site is closed will
be marked.
Assignment Problems
Design a power system which feeds the combined loads of 700 MW and 500 MVAR. Your
proposed power system may include any number of buses, any number of transmission lines, and
any number of generators and loads. However, you need to justify and comment why you have
chosen such a configuration of your proposed system.
Apply a three-phase symmetrical fault between a bus to ground and perform the following:
Step 1: Calculations
1. Draw the schematic of your proposed power system with appropriate values of
parameters and reasonable justification for your design. (15 marks)
2. Find the fault current, bus bar voltages, and line currents using bus admittance matrix
approach. (7.5 marks)
You can assume the fault impedance as any standard value as you want.
3. Find the fault current, bus bar voltages, and line currents using bus impedance matrix
approach. (7.5 marks)
4. Compare the results of part 3 with those from part 2 and comment on the results. (5 marks)
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Mehdi Korki EEE80012 September 2018: 2024 – Write My Essay For Me | Essay Writing Service For Your Papers Online
Step 2: Simulations
You may use PSSE software to perform the following tasks. Use the data calculated in Step 1 for the
power system and perform the following tasks. See Lab 0 and Lab 2-Preliminary in Learning
Material/ Lab Materials in Blackboard for the outlines on how to use PSSE to perform these
tasks.
5. Create the system (new case) in PSSE, with input data from Step 1. (snapshot of schematic
diagram in PowerWorld is needed) (4 marks)
6. Run the program to compute fault current and bus voltages during a three-phase fault at the
appropriate bus you have chosen in Step 1 (8 marks)
Assume 1.0 per-unit prefault voltage. Neglect prefault load currents and all losses.
7. Compute the positive-sequence bus impedance matrix, bus admittance matrix and line
currents. (5 marks)
8. Compare the results of the fault current and bus voltages with calculations in Step 1.
(comment on the results) (4 marks)
9. Compare the results of the bus impedance matrix, bus admittance matrix and line currents
with the calculations in Step 1. (comment on the results) (4 marks)
10. Build the dynamical model of your proposed power system and perform dynamic simulation
and three-phase short circuit fault analysis to obtain the bus voltage profile, rotor angle and
speed deviation responses of generators (10 marks)
Step 3: Research and Discussions
11. For your proposed power system, perform some research and discuss the improvements on
stability, reliability, security, and the cost of your design. (30 marks)
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