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A Static VAR Compensator (or SVC) is an electrical
Electricity

Electricity is a general term that encompasses a variety of phenomena resulting from the presence and flow of electric charge. These include many easily recognizable phenomena such as lightning and static electricity, but in addition, less familiar concepts such as the electromagnetic field and electromagnetic induction....
 device for providing fast-acting reactive power compensation on high-voltage electricity transmission
Electric power transmission

Electric power transmission is the bulk transfer of electrical power , a process in the delivery of electricity to consumers. A power transmission grid typically connects power plants to multiple Electrical substation near a populated area....
 networks. SVCs are part of the Flexible AC transmission system
Flexible AC transmission system

A Flexible Alternating Current Transmission System is a system comprised of static equipment used for the alternating current electric power transmission....
 device family, regulating voltage and stabilising the system. The term "static" refers to the fact that the SVC has no moving parts other than circuit breaker
Circuit breaker

A circuit breaker is an automatically-operated Electricity switch designed to protect an Electrical network from damage caused by Overcurrent or short circuit....
s and disconnects. Prior to the invention of the SVC, power factor compensation was the preserve of large rotating machines such as synchronous condenser
Synchronous condenser

In electrical engineering, a synchronous condenser is a synchronous motor that is not attached to any driven equipment. Its field is controlled by a voltage regulator to either generate or absorb AC power#Real,_reactive,_and_apparent_power as needed to support a system?s voltage or to maintain the system power factor at a specified level....
s.

The SVC is an automated impedance matching device, designed to bring the system closer to unity power factor
Power factor

The power factor of an alternating current electric power system is defined as the ratio of the AC power flowing to the load to the AC power , and is a number between 0 and 1 ....
.






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A Static VAR Compensator (or SVC) is an electrical
Electricity

Electricity is a general term that encompasses a variety of phenomena resulting from the presence and flow of electric charge. These include many easily recognizable phenomena such as lightning and static electricity, but in addition, less familiar concepts such as the electromagnetic field and electromagnetic induction....
 device for providing fast-acting reactive power compensation on high-voltage electricity transmission
Electric power transmission

Electric power transmission is the bulk transfer of electrical power , a process in the delivery of electricity to consumers. A power transmission grid typically connects power plants to multiple Electrical substation near a populated area....
 networks. SVCs are part of the Flexible AC transmission system
Flexible AC transmission system

A Flexible Alternating Current Transmission System is a system comprised of static equipment used for the alternating current electric power transmission....
 device family, regulating voltage and stabilising the system. The term "static" refers to the fact that the SVC has no moving parts other than circuit breaker
Circuit breaker

A circuit breaker is an automatically-operated Electricity switch designed to protect an Electrical network from damage caused by Overcurrent or short circuit....
s and disconnects. Prior to the invention of the SVC, power factor compensation was the preserve of large rotating machines such as synchronous condenser
Synchronous condenser

In electrical engineering, a synchronous condenser is a synchronous motor that is not attached to any driven equipment. Its field is controlled by a voltage regulator to either generate or absorb AC power#Real,_reactive,_and_apparent_power as needed to support a system?s voltage or to maintain the system power factor at a specified level....
s.

The SVC is an automated impedance matching device, designed to bring the system closer to unity power factor
Power factor

The power factor of an alternating current electric power system is defined as the ratio of the AC power flowing to the load to the AC power , and is a number between 0 and 1 ....
. If the power system's reactive load is capacitive (leading), the SVC will use reactors to consume VARs
Volt-amperes reactive

In alternating-current power transmission and power distribution, volt-ampere reactive power is a unit used to measure reactive power in an AC electric power system....
 from the system, lowering the system voltage. Under inductive (lagging) conditions, the capacitor banks are automatically switched in, thus providing a higher system voltage. They also may be placed near high and rapidly varying loads, such as arc furnaces, where they can smooth flicker voltage
Power quality

In its broadest sense, power quality is a set of boundaries that allows grid s to function in their intended manner without significant loss of performance or life....
.

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