A device used to step up the voltage of the AC supply network.

Converter substations may be associated with HVDC converter plants, traction current, or interconnected non-synchronous networks.

The development of a geothermal resource where levels of geothermal reservoir temperature and reservoir flow capacity are naturally sufficient to produce electricity.

Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity.

The controlled source electromagnetic method, also called sea bed logging, is a mostly offshore geophysical technique, employing electromagnetic remote-sensing technology to map the electric resistivity distribution of the subsurface.

Load shedding can also be initiated by transmission system operators.

Control theory deals with the control of dynamical systems in engineered processes and machines.

A control system manages, commands, directs, or regulates the behavior of other devices or systems using control loops.

A control room or operations room is a room serving as a central space where a large physical facility or physically dispersed service can be monitored and controlled.

Control rods are used in nuclear reactors to control the fission rate of uranium or plutonium.

The Control of Substances Hazardous to Health Regulations 2002 is a United Kingdom Statutory Instrument which states general requirements imposed on employers to protect employees and other persons from the hazards of substances used at work by risk assessment, control of exposure, health surveillance and incident planning.

A control loop is the fundamental building block of industrial control systems.

Control engineering or control systems engineering is an engineering discipline that applies control theory to design equipment and systems with desired behaviors in control environments.

Continuous gusts or stochastic gusts are winds that vary randomly in space and time.

A continental shelf is a portion of a continent that is submerged under an area of relatively shallow water known as a shelf sea.

Continental crust is the layer of igneous, sedimentary, and metamorphic rocks that forms the geological continents and the areas of shallow seabed close to their shores, known as continental shelves.

Contamination is the presence of a constituent, impurity, or some other undesirable element that spoils, corrupts, infects, makes unfit, or makes inferior a material, physical body, natural environment, workplace, etc.

A containment building, in its most common usage, is a reinforced steel, concrete or lead structure enclosing a nuclear reactor.

A contactor is an electrically-controlled switch used for switching an electrical power circuit.

The term contact resistance refers to the contribution to the total resistance of a system which can be attributed to the contacting interfaces of electrical leads and connections as opposed to the intrinsic resistance.