In this note, we are going to learn about Base Load Plant and Peak Load Plant – Definition, Key Features, and Common Examples. Welcome to Poly Notes Hub, a leading destination for engineering notes for diploma and degree engineering students.
Author Name: Arun Paul.
Base Load Plant and Peak Load Plant – Definition, Features, and Examples
Here we have discussed about the Base Load Power Plants and Peak Load Power Plants and their key features and examples

What is Base Load Plant?
A base load plant is a power plant that meets the region’s constant and continuous electricity demand. This is the minimal amount of demand that must be met 24 hours per day.
Key Features of Base Load Power Plant
- Runs continuously throughout the year
- Provides stable and reliable power
- Has low operating cost
- Slow to start or stop
- Best for handling large, constant loads
Examples of Base Load Power Plant
What is Peak Load Plant?
A Peak Load Plant is used to generate additional power when demand exceeds the base load level. This occurs during peak hours, such as in the morning and evening.
Key Features of Peak Load Power Plant
- Operates only during high-demand periods
- Fast starting and stopping
- Higher operating cost
- Smaller capacity compared to base load plants
- Used to meet sudden demand spikes
Examples of Peak Load Power Plant
- Gas turbine plants
- Diesel engine plants
- Small hydroelectric plants
Difference Between Base Load Plant and Peak Load Plant
Here is the table of differences between base load and peak load power plant –
| Feature | Base Load Plant | Peak Load Plant |
|---|---|---|
| Purpose | Supplies continuous minimum demand | Meets extra demand during peak times |
| Operation | Operates all the time | Operates only when needed |
| Operating Cost | Low | High |
| Start/Stop | Slow | Fast |
| Capacity | Large | Small |
| Examples | Coal, nuclear, large hydro | Gas turbines, diesel, small hydro |
