Unified Power Flow Controller (UPFC) is recognized as the most powerful flexible AC transmission systems (FACTS) device for power system. This paper presents a review of the most powerful FACTS device UPFC (Unified The potential benefits of FACTS equipment are now widely recognized by the. BENEFITS OF FACTSRegulation of power flows in prescribedtransmission routes .Reduces the need for construction of newtransmission lines.

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It uses a pair of three-phase controllable bridges to produce current that is injected into a transmission line using a series transformer. From Wikipedia, the free encyclopedia. Retrieved from ” https: This article relies largely or entirely on a single source.

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Unified power flow controller – Wikipedia

This article about electric power is a stub. The controller can control active and reactive power flows in a transmission line.

Unified Power Flow Controller UPFCas a representative of the third generation of FACTS devices, is by far the most comprehensive FACTS device, in power system steady-state it can implement power flow regulation, reasonably controlling line active power and reactive power, improving the transmission capacity of power system, and in power system transient state it can realize fast-acting reactive power compensation, dynamically supporting the voltage at the access point and improving system voltage stability, moreover, it can improve the damping of the system and power angle stability.

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If there are any disturbances or faults in the source side, the UPFC will not work. Articles needing additional references from September All articles needing additional references All stub articles. A unified power flow controller electrical device for providing fast-acting reactive power compensation on high-voltage electricity transmission networks.


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The UPFC uses solid state devices, which provide functional flexibility, generally not attainable by conventional thyristor controlled systems. The controllable parameters of the UPFC are reactance in the line, phase angle and voltage.

Archived from the original PDF on This or was last edited on 29 Novemberat A new approach to power transmission control” PDF. You can help Wikipedia by expanding it.

Unified power flow controller

The main advantage of the UPFC is to control the active and reactive power flows in the transmission line. Languages Deutsch Edit links.

Electric power stubs Electricity. The UPFC operates only under balanced sine wave source.