CB	Circuit breaker
CT	Current transformer
DC	Direct current
DoS	Denial of service
DoM	Denial of measurement
E-FCR	Exchange of frequency containment reserve
FDIA	False data injection attack
GPS	Global positioning system
HVAC	High-voltage alternating current
HVDC	High-voltage direct current
IED	Intelligent electronic devices
ISO	Independent system operator
LCC	Line commutated converter
LFC	Load–frequency control
MD	Missing data
MIDC	Multi-infeed direct current
MU	Measurement unit
PDC	Phasor data concentrators
PMU	Phasor measurement unit
RTO	Regional transmission organization
SCADA	Supervisory control and data acquisition
VSC	Voltage sourced converter
VT	Voltage transformer
WAMPAC	Wide-area measurements, protection, and control