Plant load factor
Also called: PLF · Topic: Infrastructure: Transport, Communications and Energy · NCERT: Beyond NCERT
Meaning
Plant load factor (PLF) shows how much of a power plant's full capacity is actually used. It compares the electricity a plant really produced with the most it could have produced by running at full rated capacity all the time.
PLF = Actual generation ÷ (Installed capacity × Hours in the period) × 100
A low PLF means expensive plant capacity is sitting idle, which raises the cost of each unit of power.
Example
A 1,000 MW plant could produce at most 1,000 × 8,760 hours = 8,760 GWh in a year. If it actually produces 6,000 GWh, its PLF is 68.5%. India's coal fleet runs at a PLF of about 68–70%.
Don't confuse with
- Installed capacity: this is the plant's size, meaning the most it can produce at one moment (for example, 1,000 MW). PLF measures how much of that size is actually used over a period.
Related concepts
- Energy infrastructure
- Energy security
- Aggregate technical and commercial losses
- Power purchase agreement
- Cross-subsidy
- Open access (electricity)
- Time-of-day tariff
- Feed-in tariff
- Levelised cost of electricity
- Grid parity