transmission system operator
entity entrusted with transporting energy in the form of natural gas or electrical power on a national or regional level using fixed infrastructure
Electricity System Operator
the TSO of Bulgaria
Ghana Grid Company
electricity transmission network operator in Ghana
regional transmission organization
electric power transmission system operator in North America that coordinates a multi-state transmission grid
Western Power
government-owned electricity transmission and distribution corporation in Western Australia
Hydro-Quebec
hydroelectric utility
Hydro One
electricity transmission and distribution utility serving in Ontario, Canada
National Grid plc
British multinational electricity and gas utility company