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Electrical Power System - An Overview

Mohammad Asif ul Haq

Lecturer, Dept. of Electrical and Electronic Engineering

Intro

Intro

Welcome to our new course on Electrical Power System!

This lesson provides an overview of the Electrical Power System

An overview of the power system

Learning Outcomes

  • Get a clear picture of the power system structure
  • Understand how different electrical systems are interconnected
  • Recognize the contribution of different courses in understanding the power system
  • Some questions/ideas to think about before next session

Generation

Generation

The electrical power is generated from the Power Plants.

These plants can be of different types.

The sources of electrical power

Generators

Generators

Based on the type of fuel used in the power plant, different sizes and types of generators may be used

How the power is born

Types of Power Plants

Sources of Power

Power Plants can be of many types, based on the fuel used for energy conversion.

Recommended Book:

Power Station Engineering and Economy - William A. Vopat

Conventional

Conventional

  • Thermal Power Plant
  • Coal based plants
  • Diesel power stations
  • Natural gas stations
  • Nuclear power plants

Commonly used sources of power

Renewable Energy

Renewables

  • Solar Energy
  • Hydroelectric Power
  • Wind Energy
  • Biomass

The greener options

Power Transformers

Trans-formers

For transmission purpose, the voltage is 'stepped-up'

For distribution, the voltage is 'stepped-down'.

Step-up and Step-down

Transmission System

Trans-mission

Power is transmitted over large distances via the transmission system

Transmission system can be broadly categorized into:

  • Overhead transmission
  • Underground transmission

Propagation of power

Recommended Reading:

Principles of Power System - Ch.7 (Mehta)

Q. What is line voltage of Tx Lines in BD?

Distribution System

Distribution

Electrical power is distributed to different levels of consumers.

It can be categorized based on nature of current, construction and connection scheme.

Distribution of electrical energy

Loads (Consumers)

Load

At the final stage of the Power System, energy reaches the individual consumers who can be of different types.

Several aspects of load on the power station need to be considered.

Consumption of electrical power

Load Types

  • Domestic
  • Commercial
  • Small Industry
  • Large Industry

Different types of consumers

Load Parameters

Parameters

Some important aspects are -

  • Maximum Demand
  • Load Factor
  • Load Curve
  • Demand Factor
  • Power Factor
  • Diversity Factor

Important aspects of load calculation

Typical Load Curve

Load Curve

Explore further

More

  • What are the limitations of the conventional power grid?
  • What can be done to overcome these issues? Hint: Smart Grids!

Some questions to =think about

This presentation is available at:

asifulhaq.com/courses

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