KD5067 Power Machine and Renewable Energy

Coursework 1

1

Programme: BEng Electrical Engineering

Module Code: KD5067

Module Title: Power Machine and Renewable Energy

Distributed on: 26 January 2026 via ELP

Submission

Time and

Date:

Coursework 1: 23:59 GMT, 24 April 2026

Word Limit: The maximum length of the report should not be beyond 1500 words

(generally withing 16 pages including diagrams, tables, main

context and references with minimum 11pt font. Otherwise, it may

lead to the deduction of the marks.

15-minute presentation videos should be also submitted for both

coursework 1 and 2.

Weighting Coursework 1 accounts for 50% of the total mark for this module.

Submission of

Assessment

Electronic Copy submission: An electronic copy of Coursework 1

& 2 is required to submit to the ELP.

It is your responsibility to ensure that your assignment arrives before

the submission deadline stated above. See the University policy

on late submission of work.

Learning Outcomes

For coursework 1, the student will be able to:

LO1: Understand the fundamental theory and operating principles of power systems,

power electronic equipment and the interaction between these. (AHEP4: C1)

LO2: Design power systems, calculate and simulate fault levels, and identify the

safe working practices needed. (AHEP4: C1, C3)

LO3: Design power converters, perform and evaluate simulation results.

(AHEP4:C1, C3)

LO4: Explain effectively on complex engineering matters through technical report

and presentation. (AHEP4: C17)

ASSESSMENT REGULATIONS

You are advised to read the guidance for students regarding assessment policies. They

are available online here.

Coursework 1

2

Late submission of work

Where coursework is submitted without approval, after the published hand-in deadline,

the following penalties will apply.

For coursework submitted up to 1 working day (24 hours) after the published hand-in

deadline without approval, 10% of the total marks available for the assessment

(i.e.,100%) shall be deducted from the coursework mark.

Coursework submitted more than 1 working day (24 hours) after the published hand-in

deadline without approval will be regarded as not having been completed. A mark of zero

will be awarded for the assessment and the module will be failed, irrespective of the

overall module mark.

These provisions apply to all assessments, including those assessed on a Pass/Fail basis.

The full policy can be found here.

Page limits and penalties

If the assignment is within +10% of the stated page limit no penalty will apply.

The page count is to be declared on the front page of your assignment and the assignment

cover sheet.

Academic Misconduct

The Assessment Regulations for Taught Awards (ARTA) contain the Regulations and

procedures applying to cheating, plagiarism and other forms of academic

misconduct.

The full policy is available at here

You are reminded that plagiarism, collusion and other forms of academic misconduct as

referred to in the Academic Misconduct procedure of the assessment regulations are

taken very seriously. Assignments in which evidence of plagiarism or other forms of

academic misconduct is found may receive a mark of zero.

Coursework 1

3

NORTHUMBRIA UNIVERSITY

Faculty of Engineering and Environment

BEng (Hons) Electrical and Electronic Engineering

Module: KD5067 Power Machine and Renewable Energy

Coursework 1: Computer Aided Power Systems and Power Converters

Coursework Weighting: 50% of Module

Coursework Tutor: Dr. David Z Gao

1 Aims of Coursework

To gain an understanding of the use of software packages for diagram building of a

power system, power flow analysis, balanced fault analysis, and power factor

correction.

To design power conversion systems and validate using simulations.

To enhance the student learning process, by relating the theory and analytical

procedures to computer aided techniques for system analysis and problems solving.

2 Learning Outcomes

The student will:

LO1: Understand the fundamental theory and operating principles of power systems,

power electronic equipment and the interaction between these. (AHEP4: C1)

LO2: Design power systems, calculate and simulate fault levels, and identify the safe

working practices needed. (AHEP4: C1, C3)

LO3: Design power converters, perform and evaluate simulation results. (AHEP4:C1,

C3)

LO4: Explain effectively on complex engineering matters through technical report and

presentation. (AHEP4: C17)

3 Coursework Requirements

(a) This is individual work and each student is required to write a report to include

computer print-outs and the different particulars described in sections 4. The report

should be typed, which is not beyond 1500 words (generally not beyond 16 pages).

Coursework 1

4

While you may work on the network model with others, the report must be your own work; you must not copy from others. Any reference material you use must be acknowledged. (b) You need to record a 15-minute presentation video to address task 4.2b in section 4. (c) To Submit the report (including results of the network modelling) and presentation video via elp, no later than 23:59 GMT, 24 April 2026. You are allowed to submit prior to the deadline.

All the simulation files of the network computer model should be sent by email to zhiwei.gao@northumbria.ac.uk, grouped and clearly labelled with students name and module number/name.

(d) Academic Integrity Statement: You must adhere to the university regulations on academic conduct. Formal inquiry proceedings will be instigated if there is any suspicion of plagiarism or any other form of misconduct in your work.

Failure to submit: The University requires all students to submit assessed coursework by the deadline stated in the assessment brief. If coursework is submitted without approval after the published hand-in deadline, penalties will be applied.

For further information on both these aspects, please see the Student Guidelines page relating to Assessment on the University web site.

4 Tasks of Coursework

4.1 Power systems

To construct, using Simscape/Matlab software package, the power network shown below. Throughout this work, refer to the Simscape User Guide. You should keep a log book to record your progress and save your simulated results.

Load 10.96

p.f. The parameters of the components in the power network above are provided as follows:

G

Bus 1

Bus 2 Bus 3a

Bus 3b

Bus 4a

Bus 4b

T1

T2

T3

11/132 kV

132/11 kV

132/11 kV

30MW at

0.94p.f. Load 215MW at

L1

L2

Coursework 1

5

Generator G is modelled as a slack generator with 10

p.u. voltage, and

the frequency is 50Hz, and the internal impedance is zero.

Transformer T1 is YY connection with the voltage ratio 11kV/132kV. The

nominal power is 100MVA. The resistance and inductance of the primary

winding are respectively 0.0025 p.u. and 0.085 p.u., and the resistance and

inductance of the secondary winding are 0.0025 p.u. and 0.085 p.u.,

respectively.

Line L1: The reactance is 25 /phase, and the resistance is zero.

Line L2: The reactance is 36/phase, and the resistance is zero.

Transformer T2 is YY connection with the voltage ratio 132kV/11kV. The

nominal power is 100MVA. The resistance and inductance of the primary

winding are respectively 0.0025 p.u. and 0.085 p.u., and the resistance and

inductance of the secondary winding are 0.0025 p.u. and 0.085 p.u.,

respectively.

Transformer T3 is YY connection with the voltage ratio 132kV/11kV. The

nominal power is 100MVA. The resistance and inductance of the primary

winding are respectively 0.0025 p.u. and 0.085 p.u., and the resistance and

inductance of the secondary winding are 0.0025 p.u. and 0.085 p.u.,

respectively.

Load 1: The active power is 30MW with the power factor of 0.94.

Load 2: The active power is 15MW with the power factor of 0.96.

a) Following the instruction of the Simscape, build the power network aforementioned.

Simulate and record the voltages, voltage angles, currents, and current angles on

the bus bars, and provide your comments and analyses.

(10%)

b) Simulate and display the active powers (MW) and reactive powers (MVAr) on the

bus bars, draw power flow chart and provide your analyses and comments.

(10%)

c) Three capacitors with equal values are connected in star formation across Load 2

to improve the power factor to 0.99 (leading). Calculate the reactive power supplied

by the three capacitors, and the capacitances of the capacitors, and demonstrate

the power factor correction in the simulation.

(10%)

d) Suppose three-phase ground fault occurs on both bus bars 4a and 4b

simultaneously. Calculate the fault currents at bus bar 4a and bus bar 4b

respectively, and the voltage, current, and power at the monitoring point of bus bar

2. Verify the calculated results with simulations.

(14%)

Coursework 1

6

e) Based on the monitoring point of bus bar 2, develop a method to detect whether

the power network is healthy (detailed discussions are needed).

(8%)

f) When the power from the generator is increased, or the power factor of the load is

increased, can the fault level of the power network be increased? Explain the

reason.

(8%)

4.2 Power converters

a) For a DC-DC buck-boost power converter, the input voltage is 50 V, the amplitude

of the output voltage is 20 V, the switching frequency is 100 Hz, and the resistance

is 20 + , where is the last digital number of the student ID. Design the inductor

and capacitor so that the peak-to-peak inductor ripple current and peak-to-peak

capacitor ripple voltage are not larger than 0.02 A and 30 mV, respectively. Build the

power converter using Matlab/Simscape to validate the design. If the power switch

and diodes both have forward voltages of 0.6 V, is your design still valid? How can

you improve the design to deliver the desired output voltage of 20 V?

(20%)

(b) With the aid of PowerPoint slides, give 15-minute video-presentation to illustrate

the following task:

(i) Design an on-off AC-AC voltage controller circuit for a hair dryer. The supply

voltage is 240 V, the rated power of the hair dryer is 2.5 W, and the power

efficiency of the converter is 75%. Determine the load resistor of the AC-AC

converter circuit. Discuss the relationship of the power efficiency and the duty

cycle.

(6%)

(ii) Discuss the types of power converters, commercial products, and applications in

renewable energy industry.

(14%)

5 References

[1] Matlab & Simulink: Simscape User Guide,

.

[2] Weedy, B., Cory, B., Jenkins, N., Ekanayake, J., and Strbac, G, Electric Power

Systems, Wiley, 2012.

[3] M. H. Rashid, Electric Renewable Energy Systems, Elsevier, 2015

Coursework 1

7

[4] R.W. Erickson and D. Maksimovic, Fundamentals of Power Electronics, 2nd ed.

Springer, 2001.

[5] Gao, Z, Power systems Part lecturing notes, eLearning Portal (Blackboard), 2026.

[6] Gao, Z, Power converters Part lecturing notes, eLearning Portal (Blackboard), 2026.

Module Specific Assessment Criteria and Rubric

PERFORMANCE ASSESSMENT

Part Technical Objectives Weighting

Task 4.1

(a)

LO1, LO2

L1,L2

Construction of the power network model with the simulated

results (7%). Analysis and discussion (3%).

10%

Task 4.1

(b)

LO1, LO2

L1, L2,

L3

Active power flow chart (4%), reactive power flow chart (3%),

analysis and comments (3%).

10%

Task 4.1

(c)

LO1, LO2

Calculations of capacitances (6%), and the simulation

implementation of power factor correction and comments (4%).

10%

Task 4.1

(d)

LO1, LO2

L1, L2,

L4, L5

Fault current calculation (6%), voltage, current and power

calculation (3%), simulations and comments (5%).

14%

Task 4.1

(e),

LO1, LO2

L4, L5, L6

Detection methods (4%) and detailed analyses (4%) 8%

Task 4.1

(f)

LO1, LO2

L1, L2,

L4, L5

Comments on power (4%) and power factor (4%) 8%

Task 4.2

(a)

LO1, LO3

Parameter calculation (8%), simulation verification (7%), design

for the improvement (5%)

20%

Coursework 1

8

Task 4.2

(b)

LO1,

LO3, LO4

L3, L4,

L5, L6

Load resistor (4%), power efficiency (2%), types of power

converters (3%), commercial products (3%), applications in

renewable industry (4%), overall quality of presentation (4%).

20%

Blooms Taxonomy Levels (BTLs):

L1. Remembering: Recall or recognize facts and basic concepts.

L2. Understanding: Explain ideas or concepts and make sense of the information.

L3. Applying: Apply what understood to solve problems in new situations.

L4. Analysing: Break information into parts to explore understandings and relationships.

L5. Evaluating: Judge the value of ideas or materials.

L6. Creating: Combine information to form a new whole or propose alternative solutions.

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