Introduction to Transmission and Distribution Systems

COURSE DESCRIPTION

This course explains, in general terms, how transmission and distribution systems deliver power from a power plant to customers. The course describes the major components of a typical T&D system, how they function, and how electricity flows through these components on its journey from the power plant to customers.

COURSE GOAL

  • Describe how transmission and distribution systems generally operate.

  • Identify the basic components of a transmission and distribution system and explain their functions.

  • Describe the flow path of electricity from a power plant, through a typical T&D system, to the customer.

SUBJECTS AND OBJECTIVES

T&D System Overview

  • Explain how power grids help ensure a continuous flow of power to customers.

  • State the purpose of a T&D system.

  • Describe the major components of a T&D system.

Power Plants

  • Define the terms "voltage," "current," "resistance," and "power."

  • State the function of a power plant

  • Describe the general characteristics of atypical power plant.

Switchyards

  • State the general function of switchyard.

  • Describe the major components of a typical switchyard.

  • Describe how the electrical flow path through a switchyard can be altered to isolate certain equipment.

Transmission Lines

  • Explain the function of transmission lines in a typical T&D system.

  • Describe the major components of transmission lines.

Substations

  • Explain the function of a substation.

  • Describe the components of a typical substation.

  • Describe how the electrical flow path through a substation can be altered to isolate certain equipment.

Distribution

  • Explain the function of a distribution system.

  • Describe the major components of a typical distribution system.

  • Explain how electricity travels through a typical distribution system to reach customers.

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Transmission