#  Ancillary Services/Interconnected Operations Services (IOS) 

 



The services necessary to effect a transfer of electricity between purchasing and selling entities that transmission providers must include in their open access transmission tariffs; IOSs are the voluntary services that transmission providers may offer to their customers (FERC Order 888, April 24, 1996). Ancillary services include regulation and frequency response; reactive supply and voltage control from generating sources, economic dispatch, and the like

 

 

 



 

 See also:- [ Glossary ](/miscellaneous/Glossary)
- [ A - F ](/miscellaneous-glossary/f)