Synchronous Compensator

Compensator, Synchronous


a synchronous electric motor that operates without an active load; it is used to improve the power factor (cos Φ) and regulate the voltage in power lines and power distribution networks. Voltage at the point of consumption (at the terminals of a transmission line) varies with the magnitude and nature of loads in the distribution network (inductive or capacitive loads).

If the load carried by a distribution network is high and inductive, a synchronous compensator operating in the overexcited mode is connected to the network, which is equivalent to connecting a capacitive load. If power is transmitted over long, lightly loaded lines, the distributed capacitance of the line has a marked influence on the operating conditions of the distribution network. In this case the capacitive current in the network is compensated by connecting a synchronous compensator operating in the underexcited mode. A constant line voltage is maintained by controlling the excitation current according to the regulator voltage. A synchronous compensator is started in the same way as conventional synchronous motors; the starting current of a synchronous compensator is 30–100 percent of the nominal current value. Synchronous compensators are manufactured with power ratings up to 100 kilovolt-amperes; high-power synchronous compensators are cooled by hydrogen or water. Synchronous compensators are used mainly in electric power substations.


References in periodicals archive ?
GE (NYSE: GE) has recently successfully commissioned the Static Synchronous Compensator (STATCOM) system for Adani Transmission, a leading Indian multinational conglomerate, helping ensure the optimized power quality from the HVDC power plant for distribution to the central government district in India.
The contractor will undertake the task of installing a static synchronous compensator ("statcom") 60 mvar within a space available in the existing heraklion iii of crete and is the subject of the present.
A STATCOM is a parallel-connected static synchronous compensator. The STATCOM is a FACTS device that continuously supplies reactive power to or injects reactive power from the system that it is connected.
Due to the real and reactive power control and the cost effective advantages of the STATCOM (Static Synchronous Compensator) used.
Chung, "Modified non-linear damping of internal dynamics via feedback linearisation for Static Synchronous Compensator" IET Gener.
Several FACTS devices are used to do so, such as Static Synchronous Series Compensator (SSSC), unified power flow controller (UPFC), Static VAr Compensators (SVC), Thyristor Controlled Series Compensators (TCSC), and static synchronous compensator (STATCOM), each of which can be connected to the system in series, parallel, or seriesparallel.
Power quality problems are harmonics, sag, and swell which are mitigated by the active filters by the configuration of dynamic voltage restorer (DVR), distribution-static synchronous compensator (D-STATCOM), and unified power quality conditioner (UPQC) [1].
Anyone whose electrical appliances have been disturbed by power fluctuations can appreciate the Static Synchronous Compensator (STATCOM), a power-flow controller for electric-utility systems.
Hence, an FACTS device called Static Synchronous Compensator (STATCOM) is employed to overcome this issue.
Power grids that feed railway systems and rail traction loads benefit enormously from flexible AC transmission system (FACTS) technologies like static var compensators (SVC) and the more recent SVC Light, also known as STATCOM - static synchronous compensator.
This justifies application of more advanced techniques like SCR based dynamic power factor compensators or STACOM (Static Synchronous Compensator) converters, which can cope with all the problems mentioned above.
The two FACTS devices that have been considered, are Static Synchronous Series Compensator (SSSC) and STATic synchronous COMpensator (STATCOM); which are series and parallel FACTS devices; respectively.

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