A unified power flow controller (UPFC) is an electrical device for providing fast-acting reactive power compensation on high-voltageelectricity 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] The controller can control active and reactive power flows in a transmission line.
Schematic of a Unified Power Flow Controller
Unified Power Flow Controller (UPFC), as a representative of the third generation of FACTS devices, is by far the most comprehensive FACTS device,[2] 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.
The UPFC uses solid state devices, which provide functional flexibility, generally not attainable by conventional thyristor controlled systems. The UPFC is a combination of a static synchronous compensator (STATCOM) and a static synchronous series compensator (SSSC) coupled via a common DC voltage link.[3]
The main advantage of the UPFC is to control the active and reactive power flows in the transmission line. If there are any disturbances or faults in the source side, the UPFC will not work. The UPFC operates only under balanced sine wave source. The controllable parameters of the UPFC are reactance in the line, phase angle and voltage. The UPFC concept was described in 1995 by L. Gyugyi of Westinghouse.[4] The UPFC allows a secondary but important function such as stability control to suppress power system oscillations improving the transient stability of power system.
A counterpart for unified power flow controller that can be used in direct current systems was proposed for use in high-voltage direct current grids[5] and for low-voltage direct current microgrids.[6] It uses a high-frequency isolated dc-dc converter cascaded with a controllable full-bridge inverter that creates a small bipolar voltage in series with the line. The controller can control the power and compensate for accumulated voltage drop in a distribution line.
The main advantage of the solution is the ability to control the bulk power flow in the line while actively processing only a small fraction of the bulk power. The partial power processing leads to increased system efficiency and use of derated components. The use of derated components results in small and cost-efficient designs.
^Nabavi-Niaki, A.; Iravani, M.R. (2018-12-18). "Steady-state and dynamic models of unified power flow controller (UPFC) for power system studies". IEEE Transactions on Power Systems. 11 (4): 1937–1943. doi:10.1109/59.544667.
^Fuchs, Ewald F.; Masoum, Mohammad A. S. (January 2008). "Unified Power Quality Conditioner (UPQC)". Power Quality in Power Systems and Electrical Machines: 443–468. doi:10.1016/B978-012369536-9.50012-7. ISBN9780123695369. Retrieved 2019-01-16.
^Sen, K.K.; Stacey, E.J. (2018-12-18). "UPFC-unified power flow controller: theory, modeling, and applications". IEEE Transactions on Power Delivery. 13 (4): 1453–1460. doi:10.1109/61.714629.
^Gyugyi, L.; Schauder, C.D.; Williams, S.L.; Rietman, T.R.; Torgerson, D.R.; Edris, A. (1995). (PDF). IEEE Transactions on Power Delivery. 10 (2): 1085. doi:10.1109/61.400878. Archived from the original (PDF) on 2012-04-26.
^Yao, Liangzhong; Hongfen Cui; Jun Zhuang; Guanjun Li; Bo Yang; Zhibing Wang (May 2016). "A DC power flow controller and its control strategy in the DC grid". 2016 IEEE 8th International Power Electronics and Motion Control Conference (IPEMC-ECCE Asia). pp. 2609–2614. doi:10.1109/IPEMC.2016.7512709. ISBN978-1-5090-1210-7. S2CID 533435.
^Purgat, Pavel; Mackay, Laurens; Adilardi Prakoso, Ryan; Ramirez-Elizondo, Laura; Bauer, Pavol (June 2017). "Power flow control converter for meshed LVDC distribution grids". 2017 IEEE Second International Conference on DC Microgrids (ICDCM). pp. 476–483. doi:10.1109/ICDCM.2017.8001089. ISBN978-1-5090-4479-5. S2CID 42891402.
External linksedit
NR Electric PCS-8200 UFPC Solution
April 12, 2024
unified, power, flow, controller, unified, power, flow, controller, upfc, electrical, device, providing, fast, acting, reactive, power, compensation, high, voltage, electricity, transmission, networks, uses, pair, three, phase, controllable, bridges, produce, . 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 The controller can control active and reactive power flows in a transmission line Schematic of a Unified Power Flow ControllerUnified Power Flow Controller UPFC as a representative of the third generation of FACTS devices is by far the most comprehensive FACTS device 2 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 The UPFC uses solid state devices which provide functional flexibility generally not attainable by conventional thyristor controlled systems The UPFC is a combination of a static synchronous compensator STATCOM and a static synchronous series compensator SSSC coupled via a common DC voltage link 3 The main advantage of the UPFC is to control the active and reactive power flows in the transmission line If there are any disturbances or faults in the source side the UPFC will not work The UPFC operates only under balanced sine wave source The controllable parameters of the UPFC are reactance in the line phase angle and voltage The UPFC concept was described in 1995 by L Gyugyi of Westinghouse 4 The UPFC allows a secondary but important function such as stability control to suppress power system oscillations improving the transient stability of power system Contents 1 Power flow controller for direct current 2 See also 3 References 4 External linksPower flow controller for direct current editA counterpart for unified power flow controller that can be used in direct current systems was proposed for use in high voltage direct current grids 5 and for low voltage direct current microgrids 6 It uses a high frequency isolated dc dc converter cascaded with a controllable full bridge inverter that creates a small bipolar voltage in series with the line The controller can control the power and compensate for accumulated voltage drop in a distribution line The main advantage of the solution is the ability to control the bulk power flow in the line while actively processing only a small fraction of the bulk power The partial power processing leads to increased system efficiency and use of derated components The use of derated components results in small and cost efficient designs See also editSynchronous condenser Static VAR compensator Static synchronous compensatorReferences edit Nabavi Niaki A Iravani M R 2018 12 18 Steady state and dynamic models of unified power flow controller UPFC for power system studies IEEE Transactions on Power Systems 11 4 1937 1943 doi 10 1109 59 544667 Fuchs Ewald F Masoum Mohammad A S January 2008 Unified Power Quality Conditioner UPQC Power Quality in Power Systems and Electrical Machines 443 468 doi 10 1016 B978 012369536 9 50012 7 ISBN 9780123695369 Retrieved 2019 01 16 Sen K K Stacey E J 2018 12 18 UPFC unified power flow controller theory modeling and applications IEEE Transactions on Power Delivery 13 4 1453 1460 doi 10 1109 61 714629 Gyugyi L Schauder C D Williams S L Rietman T R Torgerson D R Edris A 1995 The unified power flow controller A new approach to power transmission control PDF IEEE Transactions on Power Delivery 10 2 1085 doi 10 1109 61 400878 Archived from the original PDF on 2012 04 26 Yao Liangzhong Hongfen Cui Jun Zhuang Guanjun Li Bo Yang Zhibing Wang May 2016 A DC power flow controller and its control strategy in the DC grid 2016 IEEE 8th International Power Electronics and Motion Control Conference IPEMC ECCE Asia pp 2609 2614 doi 10 1109 IPEMC 2016 7512709 ISBN 978 1 5090 1210 7 S2CID 533435 Purgat Pavel Mackay Laurens Adilardi Prakoso Ryan Ramirez Elizondo Laura Bauer Pavol June 2017 Power flow control converter for meshed LVDC distribution grids 2017 IEEE Second International Conference on DC Microgrids ICDCM pp 476 483 doi 10 1109 ICDCM 2017 8001089 ISBN 978 1 5090 4479 5 S2CID 42891402 External links editNR Electric PCS 8200 UFPC Solution Retrieved from https en wikipedia org w index php title Unified power flow controller amp oldid 1166539433, wikipedia, wiki, book, books, library,
