ELEC5206 Sustainable Energy Systems
The Complete Exam Bible · S2 2026ELEC5206 Overview
- 6 credit points
- Postgraduate unit
- Semester 2, 2026
- Camperdown/Darlington campus
- Closed-book final exam
ELEC5206 Sustainable Energy Systems is a 6-credit-point postgraduate unit in the University of Sydney School of Electrical and Computer Engineering.
- Assessed by A closed-book final exam, two in-class quizzes, seven group lab reports and lab attendance.
- Hardest step Turning a PV operating point into converter numbers: duty ratio, inductance, input capacitance and loop gains.
- How to prepare Rebuild each design calculation by hand from the module ratings, then explain why the PV side regulates input voltage.
How ELEC5206 is assessed
| Component | Weight | Format |
|---|---|---|
| Final Exam | 45% | Written exam: supervised, paper-based, closed book; formal exam period; 2 hours; individual |
| In-class quiz 1 | 8% | Practical test: in-class quiz via Canvas; Week 06; 50 minutes; individual |
| In-class quiz 2 | 8% | Practical test: in-class quiz via Canvas; Week 10; 50 minutes; individual |
| Lab 1 report | 2% | Group written work: PDF via Canvas, evaluated on report quality; Week 04; 10% of the mark lost per day late |
| Lab 2 report | 5% | Group written work: PDF via Canvas, evaluated on report quality; Week 05; 10% lost per day late |
| Lab 3 report | 5% | Group written work: PDF via Canvas; Week 07; 10% lost per day late |
| Lab 4 report | 5% | Group written work: PDF via Canvas; Week 08; 10% lost per day late |
| Lab 5 report | 5% | Group written work: PDF via Canvas; Week 10; 10% lost per day late |
| Lab 6 report | 5% | Group written work: PDF via Canvas; Week 11; 10% lost per day late |
| Lab 7 report | 5% | Group written work: PDF via Canvas; Week 13; 10% lost per day late |
| Lab 1 Attendance | 1% | Lab attendance; Week 02; up to 3 hours; individual |
| Lab 2 attendance | 1% | Lab attendance and behaviour; Week 03; 3 hours |
| Lab 3 attendance | 1% | Lab attendance and behaviour; Week 05; 3 hours |
| Lab4 attendance | 1% | Lab attendance and behaviour; Week 06; 3 hours |
| Lab 5 attendance | 1% | Lab attendance and behaviour; Week 08; 3 hours |
| Lab 6 attendance | 1% | Lab attendance and behaviour; Week 09; 3 hours |
| Lab 7 attendance | 1% | Lab attendance and behaviour; Week 11; 3 hours |
The 2026 unit outline lists seventeen components totalling 100%: the 45% final exam, two 8% quizzes, seven group lab reports worth 32% together and seven lab attendance marks of 1% each. No component is marked as a hurdle task in the outline. Exam dates, rooms and any change to the schedule are published on Canvas and in the University exam timetable.
Assessment structure
What ELEC5206 covers
ELEC5206 treats sustainable energy as a power electronics problem. This guide follows the lecture sequence for photovoltaic systems from cell physics and simulation models, through the PV-side DC/DC converters and their control, maximum power point tracking, the DC link and single-phase grid connection, practical home system design and three-phase conversion, to rechargeable batteries.
The wind, techno-economic, policy and emerging-technology weeks listed in the unit outline are best revised from their Canvas lecture slides.
Solar PV Fundamentals and Standard Test Conditions
PV effect, cells to arrays, STC rating, VOC, ISC and MPP, standalone and grid-tied systems02The Single Diode Model and PV Output Curves
Shockley diode, ideal single-diode model, STC parameter identification, irradiance and temperature correction03PV Model Accuracy and Parameter Improvement
DOC, DSC and DMPP indices, series resistance, simplified single-diode model, Newton-Raphson solver04Classifying PV Power System Architectures
Centralised and distributed MPPT, isolation, mismatch and shading loss, string, module, submodule and cell level05Buck Converter as a PV Side Converter
Selection rule, nominal duty, inductor and input capacitor sizing, switched-state model, battery charging06Boost Converter for PV Voltage Step-Up
Selection corner, duty ratio, inductor and PV-link capacitor, smooth input current, buck versus boost07Buck-Boost and Flyback PV Interfaces
Overlapping voltage windows, inverted polarity, turns ratio, magnetising inductance, isolation, interleaving08Dynamic Modelling and Voltage Control of the PVSC
Averaged and small-signal boost model, damping and natural frequency, affine design, PID gains, margins09Maximum Power Point Tracking
Load matching, virtual resistance, hill climbing, incremental conductance, perturbation size and rate10DC Link Design and Hysteresis Current Control
Double-line-frequency ripple, DC-link capacitance, on-off and hysteresis control, comparator design11Single-Phase Grid-Side Conversion
H-bridge states, grid following, L filter dynamics, current command, two-channel 6 kW system12Designing a Grid-Tied Home PV System
Seven-step procedure, area rule, string voltage limits with temperature, microinverter alternative13DC to Three-Phase AC Conversion
180-degree switching, delta and wye voltages, sine-triangle PWM, Park transform, space vector modulation14Rechargeable Batteries for Energy Storage
Chemistries, C-rate, SOC, CC-CV charging, Thevenin model, cell mismatch and balancing, supercapacitorsThe unit outline describes sustainable technologies such as photovoltaic systems, efficient power supplies and energy-conserving control as having intelligent, high-power electronics at their heart, and uses them to teach modelling, optimisation, analysis, simulation and design. The lectures build a complete photovoltaic power system piece by piece.
You start with the photovoltaic effect, standard test conditions and the three critical points of a PV curve, then model a cell with the ideal single-diode model and improve it with a series resistance solved by Newton-Raphson.
From there the unit classifies PV systems by the level at which maximum power point tracking is applied, designs the PV-side converter in buck, boost, buck-boost and flyback form, and derives a small-signal model of the boost stage so a PV voltage loop can be designed with affine parameterisation and checked with phase and gain margins.
Maximum power point tracking follows, with hill climbing and incremental conductance, then the DC link, hysteresis current control, the single-phase grid-side converter, a practical 5 kW home design, three-phase modulation and rechargeable batteries.
The assumed background is power electronics converters and control theory at the level of ELEC3204/9204 and ELEC3304/9304. Seven laboratory sessions run alongside the lectures, from PV module characterisation and simulation to MPPT on a microcontroller and wind power. The guide works every method with its own numbers so you can reproduce the steps in a closed-book exam.
Worked example · free
Sizing a boost PV-side converter from a module datasheet
- 1Duty ratio in continuous conduction: D = 1 − VMPP/VO = 1 − 32/48 = 0.333.
- 2Inductor from the switch-on interval, when the PV voltage drives the inductor: L = VMPPD/(ΔILfsw) = 32 × 0.333/(1.2 × 40,000) = 10.67/48,000 = 222 µH.
- 2Input capacitor: with the inductor on the PV side, Cin only absorbs the triangular inductor ripple, so Cin = ΔIL/(8ΔVPVfsw) = 1.2/(8 × 0.25 × 40,000) = 1.2/80,000 = 15 µF.
- 1Check the logic: the converter regulates its input at VMPP while the 48 V bus is treated as fixed, so the PV ripple, not the output ripple, sets the capacitor.
Key terms
- Standard test conditions
- The rating reference for PV modules defined by IEC 60904: 1000 W/m² irradiance, 25 °C cell temperature and air mass 1.5.
- Maximum power point
- The unique point on a PV power-voltage curve where output power peaks; its voltage and current define the module's power rating.
- Ideal single-diode model
- A PV cell model made of a photocurrent source in parallel with one diode, with three unknowns identified from datasheet points.
- PV side converter
- The DC/DC stage next to the PV generator that regulates PV voltage and performs maximum power point tracking.
- Hill climbing
- A perturb-and-observe search that keeps stepping in the same direction while power rises and reverses when power falls.
- DC link
- The capacitor bank between the PV-side and grid-side converters that buffers energy and holds a steady DC voltage.
- Grid following
- Operation in which the inverter injects current that tracks the measured grid voltage rather than setting voltage itself.
- Space vector modulation
- A three-phase modulation method that schedules eight switching vectors and reaches a line-to-neutral amplitude of Vin over root three.
- State of charge
- The remaining battery capacity expressed as a percentage of rated capacity.
ELEC5206 FAQ
How is the grade for this unit made up?
The 2026 outline weights the closed-book final exam at 45%, two in-class quizzes at 8% each in Weeks 6 and 10, seven group lab reports at 32% together (2% for the first, 5% for each of the rest) and seven lab attendance marks at 1% each. None is listed as a hurdle task, and group reports lose 10% of their mark for each late day.
What does the closed-book final exam cover?
The outline lists learning outcomes 1 to 4 for the exam: the engineering principles of solar, wind and storage systems, their analysis and control for grid connection, mathematical modelling and simulation, and the design of a home PV system. It is supervised, paper-based and 2 hours long in the formal exam period, so the design formulas must be in your head rather than on a sheet.
What background does the unit assume?
The outline assumes power electronics converters and control theory at the level of ELEC3204/9204 and ELEC3304/9304. In practice that means steady-state converter analysis, inductor volt-second balance, transfer functions and Bode plots. If those feel rusty, revise them before the PV-side converter and voltage-control lectures.
Which calculations recur across the PV chapters?
Four keep returning: the duty ratio from a voltage ratio, inductor sizing from one switching interval, input-capacitor sizing from the PV ripple target, and temperature correction of module voltage. Later chapters add the DC-link capacitance from power, frequency, ripple and voltage, and the grid current amplitude from twice the DC power over the peak grid voltage.
How do the labs connect to the lectures?
Lab 2 measures a PV module's I-V and P-V curves with resistors and then with a buck converter acting as a virtual resistance; Lab 3 builds the single-diode simulation of the same module; Lab 4 programs hill climbing on a microcontroller. The later labs move to wind power generation and simulation.
How should I revise for the in-class quizzes?
Quiz 1 falls in Week 6 and quiz 2 in Week 10, both 50 minutes on Canvas. Rework each lecture's case study with fresh numbers and practise reading which voltage corner, which switching interval and which loop a question is about, since that choice decides the formula.
Can an AI tutor help with this unit?
Yes, as a study aid. Sia can walk you through a boost converter design step by step, check your small-signal derivation or quiz you on MPPT decision rules. It does not complete graded work for you, and the final exam and quizzes are secure tasks where AI is not allowed, so use it to practise the method beforehand.
How to study for the exam
Treat ELEC5206 as one system drawn left to right: PV generator, PV-side converter, DC link, grid-side converter, grid, with a battery branch. For each block keep a short card holding its governing equation, its design formula and the lecture's case-study numbers, then rework every case study with values you choose yourself until the arithmetic is automatic.
The exam is closed book, so practise writing the formulas from memory and stating the assumption behind each one: which switching interval, which environmental corner, which variable is treated as constant.
Pair each chapter with its lab: the curve you measured in Lab 2 is the curve you model in Lab 3 and track in Lab 4. When a derivation will not stick, ask Sia to explain it a different way and set you a fresh version to solve.
Your AI Electrical Engineering tutor for ELEC5206
Stuck on a hard ELEC5206 question? Sia is AskSia’s AI Electrical Engineering tutor — ask any ELEC5206 Sustainable Energy Systems question and get a clear, step-by-step explanation grounded in how the course is actually taught and assessed. Read this whole study guide free, then take your hardest questions to Sia.
