Power System Analysis and Control Assignment

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Hi There,

There are three tasks in this Power System Analysis and Control Assignment, including:

Fault Currents calculation, Faulted bus voltage calculation and Node voltage calculation.

File description:

The Assignment Scenario and each tasks are listed clearly in pages 1-3 , Assignment 2 .pdf file.

The Rated power and Voltage data for the tasks is listed in page 1 ,Assignment 2 .pdf file.

The provided values in impedance for each section's calculation is provided in data_creation2018.xls file.

Requirement:

1. A detailed report should contain the workings/ computer code associated with each Part of the assignment. Also, an in-depth discussion of results should be included in the report for each section. The report template is provided in Report Template.docx. (Picture of Neat hand-writing for step-by-step calculations part is acceptable for efficiency )

2.IMPORTANT: Numerical accuracy within 3% is essential. (Work with at least 4 significant numbers). Marks are awarded strictly for answers.

3. All other details&requirements are all provided in Assignment 2 .pdf file.


Cheers!

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Student ID 3652880 Enter your ID (without 's' at the front) in green shaded cell(C7). Example : 2309099 Your name and your data should appear in the data sheet. If "Incorrect ID" appears, then your name is not (database downloaded on 17 Sept 2018). If you enrolled later, please e Reactance (p.u.) generator G positive sequence impedance motor M positive sequence impedance Transmission line positive sequence impedance Transformer T1 positive sequence impedance Transformer T2 positive sequence impedance 0.155 0.228 0.111 0.082 0.082 generator G negative sequence impedance motor M negative sequence impedance Transmission line negative sequence impedance Transformer T1 negative sequence impedance Transformer T2 negative sequence impedance 0.076 0.228 0.111 0.082 0.082 generator G zero sequence impedance motor M zero sequence impedance Transmission line zero sequence impedance Transformer T1 zero sequence impedance Transformer T2 zero sequence impedance 0.053 0.106 0.333 0.082 0.082 Last Name: First Name: Zhou Wotong ) in green shaded cell(C7). Example : 2309099 et. If "Incorrect ID" appears, then your name is not in the database. you enrolled later, please e-mail the course coordinator EEET2106/ EEET2339 Assignment-2 2018 page 1 of 3 School of Engineering, Electrical and Biomedical Engineering EEET2106/ EEET2339 Power System Analysis & Control Assignment-2 Objectives: The main objective of this assignment is applying your knowledge gained from Power System Analysis and Control Course on following topics: ▪ Balanced Faults ▪ Theory of Symmetrical Components ▪ Unbalanced Faults Reading Materials: Examples 9.1, 9.2, 9.3, 9.4 and 9.5 of the prescribed text book are recommended prior to this assignment. Assignment Scenario: Assume that a recent thunderstorm in your state has resulted in several different types of faults (e.g., three-phase short-circuit faults, single-line to ground fault, line-to-line fault, line-to-line-toground) in the transmission system. As the newly recruited Graduate Electrical Engineer you have been selected by the Chief Engineer to conduct a theoretical analysis of these faults. The Chief Engineer recommend you to use the single-line diagram of the power network shown in Figure 1 for the fault study. The power and voltage ratings for the generator G, motor M, transmission line, transformer T1 and transformer T2 given in Table 1. The neutrals of the generator and the delta-star transformers are solidly grounded. The motor neutral is grounded through a reactance 0.05 pu on the motor base. Figure 1: Single-line diagram. Table:1 Ratings of the system components Rated power of generator G Rated power of motor M Rated voltage of G Rated voltage of M Transformer T1 primary voltage rating Transformer T1 secondary voltage rating Transformer T2 primary voltage rating Transformer T2 secondary voltage rating LM/ 2018 100 MVA 100 MVA 13.8 kV 13.8 kV 13.8 kV 138 kV 13.8 kV 138 kV 1|Page EEET2106/ EEET2339 Assignment-2 2018 page 2 of 3 How to obtain System Data for your assignment: A unique set of system data applicable to you is to be created by the excel spreadsheet “Assign2_data_creation2018.xls”. This file can be downloaded from the Assignments section of the Power System Analysis & Control Canvas shell. Save it on your own storage device. Open the saved file using the Excel program and enter your student ID in cell C7 (light green shaded) to create your own data set. Note that if you open the file in the browser instead of saving it and then opening it with Excel, you will not be able to create your own data. This data sheet carries your student number, name and the data applicable to you. Please ensure that you use the data in the data sheet with your name. Answers obtained using any other data will be invalid. Table:2 Values for this table are to be generated via the Excel Spread Sheet Plant generator G motor M Transmission line Transformer T1 Transformer T2 Positive sequence reactance [pu] xxx xxx xxx xxx xxx Negative sequence reactance [pu] xxx xxx xxx xxx xxx Zero sequence reactance [pu] xxx xxx xxx xxx xxx Fault Currents Calculation Tasks: Part 1: [8 marks] Taking the rated power of generator G as the base power, and the transformer T1 low-voltage side rated voltage as the base voltage, calculate the Thevanin’s equivalent zero-sequence impedance, positive sequence impedance and the negative sequence impedance viewed from Bus-2. Specify your answers in per-unit. Part 2: [9 marks] Assuming the pre-fault bus voltages are at 1.05pu, calculate the fault currents in each phase for a three-phase balanced fault at Bus-2. Specify your answers in per-unit. Part 3: [9 marks] Assuming the pre-fault bus voltages are at 1.05pu, calculate the fault currents in each phase for a single-line to ground fault at Bus-2. Specify your answers in per-unit. Part 4: [9 marks] Assuming the pre-fault bus voltages are at 1.05pu, calculate the fault currents in each phase for a line-to-line fault at Bus-2. Specify your answers in per-unit. Part 5: [9 marks] Assuming the pre-fault bus voltages are at 1.05pu, calculate the fault currents in each phase for a line-to-line-to-ground fault at Bus-2. Specify your answers in per-unit. LM/ 2018 2|Page EEET2106/ EEET2339 Assignment-2 2018 page 3 of 3 Faulted bus (bus-2) voltage calculation: Part 6: [8 marks] Calculate the Bus-2 phase voltages for the condition in part-3, single-line to ground fault at Bus2. Specify your answers in per-unit. Part 7: [8 marks] Calculate the Bus-2 phase voltages for the condition in part-4, line-to-line fault at Bus-2. Specify your answers in per-unit. Part 8: [8 marks] Calculate the Bus-2 phase voltages for the condition in part-5, line-to-line-to-ground at Bus-2. Specify your answers in per-unit. Node voltage (example: bus-3 voltage) calculation: Part 9: [8 marks] Calculate the Bus-3 phase voltages for the condition in part-2, for a three-phase balanced fault at Bus-2. Specify your answers in per-unit. Part 10: [8 marks] Calculate the Bus-3 phase voltages for the condition in part-3, single-line to ground fault at Bus2. Specify your answers in per-unit. Part 11: Calculate the Bus-3 phase voltages for the condition in part-4, line-to-line fault at Bus-2. Specify your answers in per-unit. Part 12: Calculate the Bus-3 phase voltages for the condition in part-5, line-to-line-to-ground at Bus-2. Specify your answers in per-unit. Assignment Submission: The Assignment Submission has two components: 1. Report [20 Marks] – A detailed report should contain the workings/ computer code associated with each Part of the assignment. That will enable to award additional marks if the final answer is incorrect due to minor mistakes. Also, an in-depth discussion of results should be included in the report for each section. 2. Answer Spreadsheet [80 Marks] - You need to provide the requested answers in Parts 1 to 12 in the accompanied answers spreadsheet following the description below: (i) Please download the answer template Assign2_answers_2309099.xls from: Power System Analysis Canvas Shell >> Assignments >> Assignment-2 (ii) Rename the file with your student number instead of the default student ID “2309099”. The file name should be of the format Assign2_answers_xxxxxxx.xls where xxxxxxx represents the numeric part of your student ID. (iii) Enter your answers in the appropriate cells. The light green shaded cells are editable and your answers should be placed in these cells. Place the numeric values LM/ 2018 3|Page EEET2106/ EEET2339 Assignment-2 2018 page 4 of 3 (not formulas) in the cells and should be calculated to at least four decimal points in scientific format. Refer the default answers in the template as a guide. (iv) Marking will be done semi-automatically by a computer program. Numerical accuracy within 3% is essential. (Work with at least 4 significant numbers). Marks are awarded strictly for answers. ▪ Assignment submission should be done via Canvas and you should submit both your Report and Answer Spreadsheet using the relevant submission links. o The assignment submission page can be accessed from: Power System Analysis Canvas Shell >> Assignments >> Assignment-2 >> o Click on the link “Submit Assignment” Button and upload your Report and Answer Spreadsheet. To complete the submission click the “Submit” button. ▪ The assignment will be marked out of 100% based on the report and numeric answers submitted. This assignment will account for 7.5% of the overall score for EEET2106 and EEET2339. Answers to the assignment are to be submitted on or before: 11:59 pm on Monday, 8th October 2018 Late Submission Penalty: Assignments submitted after but within one week from the deadline will attract a penalty of 20%. Assignments submitted after one week from the deadlines will not be marked. Plagiarism: Assignment submissions should be strictly individual work, if any submission found to be plagiarised from other sources your mark will be made zero and will be directed to the school disciplinary committee for hearing. ---End of assignment--- LM/ 2018 4|Page EEET2106/ EEET2339 Power System Analysis & Control ASSIGNMENT-2 Name | Student ID | Date Table of Contents Table of Contents: ................................................................. Error! Bookmark not defined. Fault Currents Calculation Workings ............................................................................. 2 Faulted bus (bus-2) voltage calculation.......................................................................... 3 Node voltage (bus-3 voltage) calculation: .............................................................................4 PAGE 1 FAULT CURRENTS CALCULATION WORKINGS Part 1: Part 2: Part 3: Part 4: Part 5: Discussion: PAGE 2 FAULTED BUS (BUS-2) VOLTAGE CALCULATION Part 6: Part 7: Part 8: Discussion: PAGE 3 NODE VOLTAGE (BUS-3 VOLTAGE) CALCULATION: Part 9: Part 10: Part 11: Part 12: Discussion: PAGE 4
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