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A unified power flow controller (UPFC) is an electrical device for providing fast-acting reactive power compensation on high-voltage electricity transmission networks. It uses a pair of three-phase controllable bridges to produce current that is injected into a transmission line using a series transformer. [ 1 ]
However, static VAR compensators are more expensive than mechanically switched capacitors, so many system operators use a combination of the two technologies (sometimes in the same installation), using the static VAR compensator to provide support for fast changes and the mechanically switched capacitors to provide steady-state VARs.
The United States Air Force Combat Control Teams, singular Combat Controller (CCT) (AFSC 1Z2X1), are an elite special operations force (specifically known as "special tactics operators") who specialize in all aspects of air-ground communication, as well as air traffic control, fire support (including rotary and fixed-wing close air support), and command, control, and communications in covert ...
A Scud missile is one of a series of tactical ballistic missiles developed by the Soviet Union during the Cold War.It was exported widely to both Second and Third World countries.