Glossary
NIV (Net Imbalance Volume)
the system's signed net imbalance (MWh) for a settlement period. Positive = system short (more demand than contracted generation → NESO net-buys → price tends high); negative = long (a surplus). Drives the "system short / long" signal.
More terms
- Balancing Mechanism (BM)
- BESS
- BM Unit (BMU)
- BMRS
- Carbon intensity
- CCGT / OCGT
- Curtailment
- DNO region
- Elexon
- Embedded (distributed) generation
- GB vs UK
- Generation mix
- Grid frequency
- Imbalance / cash-out price
- INDO / NDF
- Interconnector
- ITSDO / TSDF
- Metered / transmission-connected
- MID
- NESO
- PN (Physical Notification)
- PS / NPSHYD
- PV Live
- REMIT
- REPD
- Settlement period