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Power Network Analysis

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777 min

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Electrical Engineering

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Why enroll

Participants should join this course to gain a clear and practical understanding of power system analysis and protection. It prepares students for industry roles, higher studies, and competitive exams by covering both classical concepts and modern smart grid challenges.

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Is this course for you?

You should take this if

You work in Automotive
You're a Electrical Engineering professional
You have 3+ years of hands-on experience in this field
You want to build skills in Engineering & Design, Project Management

You should skip if

You're new to this field with no prior experience
You need a different specialisation outside Electrical Engineering
You need live interaction with an instructor

Course details

This course is designed for third-year and final-year undergraduate Electrical Engineering students who want to build a strong foundation in power system analysis. It explains how electrical power networks operate under normal (steady-state) conditions and during disturbances. Students will learn the basic tools and methods used to analyze power flow, system stability, and protection schemes. The course introduces fault analysis, including transient and sub-transient behavior of power systems. Key concepts related to generators, transmission lines, and loads are explained in a clear and practical manner. Special focus is given to understanding system stability and how power systems respond to sudden changes. The course also covers protection principles used to safeguard power networks. Modern challenges in power systems due to renewable energy integration are discussed. Smart grid concepts and their impact on system analysis are introduced. Overall, the course connects theory with real-world power network applications.

Source: IIT Kanpur - NPTEL [Youtube Channel]

Course suitable for

Key topics covered

Introduction
Basic Circuit Principles – Phasor Diagrams
Basic Circuit Principles – Power in 1 Φ AC Circuit
Basic Circuit Principles – Power in 3 Φ AC Circuit
Transformers and Per Unit Analysis – Basics of Transformers
Transformers and Per Unit Analysis – Basic and 3 Φ Transformers
Transformers and Per Unit Analysis – Per Unit Analysis
Transformers and Per Unit Analysis – Example
Synchronous Generators – Basics of 3 Φ Machines
Synchronous Generators – Induced EMF, Armature Reaction
Transmission Line Parameters – Capacitance of 3 Φ Lines, Effects of Earth
Synchronous Generators – Power Expressions and Capability Curves
Synchronous Generators – Capability Curves
Synchronous Generators – Real and Reactive Power Control
Synchronous Generators – Economic Dispatch
Synchronous Generators – Parallel Operation
Transmission Line Parameters – Line Resistance
Transmission Line Parameters – Inductance Due to Internal Flux
Transmission Line Parameters – Inductance Between Points Outside the Conductor
Transmission Line Parameters – Magnetic Flux Linkage of a Conductor in a Group of Conductors
Transmission Line Parameters – Inductance of 3 Φ Lines
Transmission Line Parameters – Capacitance Evaluation
Transmission Line Parameters – Capacitance of 3 Φ Lines, Effects of Earth
Transmission Line Parameters – Use of Tables for Reactance Calculation and Example
Transmission Line Models and Performance – Basics, Two-Port Networks

Course content

The course is readily available, allowing learners to start and complete it at their own pace.

25 lectures12 hr 57 min

Introduction
41 min
Basic Circuit Principles-Phasor Diagrams
26 min
Basic Circuit Principles-Power in 1 ΦAC circuit
27 min
Basic Circuit Principles-Power in 3Φ AC circuit
30 min
Transformers and per unit Analysis-Basic of transformers
32 min
Transformers and per unit analysis-Basic and 3Φ transformers
28 min
Transformers and per unit analysis- per unit analysis
33 min
Transformers and per unit analysis-example
23 min
Synchronous Generators-basics of 3Φ machines
21 min
Synchronous Generators-Induced emf, armature reaction
21 min
Transmission line parameters- capacitance of 3 Φ lines, effects of earth
25 min
Synchronous Generators-power expressions and capability curves
27 min
Synchronous Generators- capability curves
29 min
Synchronous Generators- Real and reactive power control
37 min
Synchronous Generators- Economic Dispatch
41 min
Synchronous Generators- Parallel Operation
32 min
Transmission line parameters- line resistance
31 min
Transmission line parameters-inductance due to internal flux
29 min
Transmission line parameters- inductance between points outside the Conductor
29 min
Transmission line parameters- magnetic flux linkage of a conductor in a group of conductors
31 min
Transmission line parameters- Inductance of 3 Φ lines
37 min
Transmission line parameters- capacitance evaluation
39 min
Transmission line parameters- capacitance of 3 Φ lines, effects of earth.
33 min
Transmission line parameters- use of tables for reactance calculation and example
39 min
Transmission line models and performance -basics, two portnetworks
36 min

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Project Management

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Questions and Answers

Q: During a 48 V mild-hybrid launch review, you're asked: "battery contactor welded closed risk mitigation automotive power network analysis". The HVIL loop is intact, pre-charge works, and the BMS meets ISO 26262 ASIL‑C assumptions. The customer derogation removes the secondary pyro-fuse. If the main contactor welds closed during a crash event, what physical consequence is NOT prevented by the remaining safeguards?

A: Governing principle: HVIL and BMS logic mitigate exposure by command, not by breaking a welded power path. Applied here: With a welded contactor and no pyro-fuse, you lose physical isolation, so post-crash energization and thermal propagation remain credible. Arc flash at key-off is a switching transient issue, not created by a contactor that never opens. Distractor B traps engineers who conflate pre-charge collapse behavior with welded-contact failure effects.

Q: You're sanity-checking a supplier calc titled "three phase short circuit current calculation for automotive LV power network". A 12 V network is fed by a 3‑phase, 5 kW alternator at 6 mΩ phase resistance. Assuming a bolted three‑phase short at the rectifier output, what's the steady-state short-circuit current per phase at rated speed?

A: Governing principle: Three‑phase short current uses phase voltage over phase resistance, not line values. Applied here: 12 V DC implies ~6.9 V phase equivalent; 6.9 V / 0.006 Ω ≈ 1.15 kA peak, ~577 A RMS steady per phase after rectification assumptions. Distractor A catches those who jump to line‑to‑line voltage without mapping through the rectifier.

Q: In a vehicle power network load dump test, you're searching "automotive load dump test voltage trend marginal pass". The last three tests pass the 35 V peak criterion, but the decay time constant is increasing. If alternator field current is slow to collapse, what happens next and what's the right response?

A: Governing principle: Load dump damage risk scales with both amplitude and duration. Applied here: Even if the clamp holds peak below 35 V, slower field decay extends ECU stress time. Fix the control loop, not the clamp setpoint. Distractor B appeals to instinct that longer equals higher, ignoring independent control loops.

Q: After SOP‑1, warranty returns spike. Search term on your screen: "automotive power network intermittent brownout only during hot restart". Symptoms: brief 7 V dip, no DTCs, only after heat soak. What root cause fits all observations?

A: Governing principle: Temperature‑dependent mechanical opens cause transient, non‑logged events. Applied here: Heat soak expands the cracked ground, momentarily lifting reference during restart, then re-seating. Battery IR trends and software limits don't explain the absence of DTCs. Distractor A fits the dip but not the temperature dependency after soak.