Whether you are preparing for interviews, working in the power sector, or revising core concepts, the following five topics are essential.
1. What is a Substation?
A substation is a critical facility within an electrical power system that performs several important functions:
•Steps voltage levels up or down through transformers.
•Controls and switches the flow of electrical power.
•Enhances system protection, stability, and reliability.
2. What is an Electrical Grid?
An electrical grid is an interconnected network designed to transmit electricity from generating stations to end users. It typically consists of:
•Power generation plants
•Transmission lines
•Substations
•Distribution networks
3. What is a Feeder?
A feeder is an electrical conductor or circuit that carries power from a substation to distribution transformers or load centers. Feeders are designed to deliver electricity efficiently while minimizing power losses.
4. What is Transmission?
Transmission is the process of transferring large quantities of electrical energy from generating stations to substations through high-voltage transmission lines. High voltages are used to reduce losses and improve efficiency over long distances.
5. What is Distribution?
Distribution is the final stage of the power delivery process, where electricity is supplied from substations to residential, commercial, and industrial consumers at lower voltage levels.
Basic Power System Flow
Generation → Transmission → Substation → Distribution → Consumers
A clear understanding of these fundamentals provides a strong foundation for engineers involved in power generation, transmission, and distribution systems.
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