Your browser does not support JavaScript!

Unified power-flow control concept for flexible AC transmission systems

Unified power-flow control concept for flexible AC transmission systems

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
IEE Proceedings C (Generation, Transmission and Distribution) — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

The abstract of the paper is to outline the technical and economical factors which characterise the uniform, all solid-state power-flow controller approach for real-time controlled, flex ible AC transmission systems.The unified power-flow controller in its general form can provide simultaneous, real-time control of all basic power system parameters (transmission voltage, impedance, and phase angle), or any combinations thereof, determining the transmitted power. The parameters selected for control can be changed without hardware alterations, e.g. the function of the controller can be changed from that of a phase-shifter to that of a series line compensator, or vice versa, with or without additional terminal voltage regulation and shunt VAr compensation, to adapt to particular short term contingencies or future system modifications.


    1. 1)
      • Sumi, Y.: `New static VAr vontrol using force-commutated inverters', Paper No. 38WM2286, IEEE PES Winter Power Meeting, 1981.
    2. 2)
      • Gyugyi, L.: `Solid-state control of electric power in AC transmission systems', Invited Paper T-IP.4, International symposium on electric energy converters in power systems, 1989, Capri, Italy.
    3. 3)
      • L. Gyugyi . Reactive power generation and control by Thyristor circuits. IEEE Trans. Ind. Appl. , 5
    4. 4)
      • Ewart, D.N.: `Flexible AC transmission systems (FACTS) scoping study', EL-6943, EPRI Report, 1990.
    5. 5)
      • Christl, N.: `Advanced series compensation with variable impedance', EPRI Workshop on FACTS, November 1990, Cincinnati, Ohio, USA.
    6. 6)
      • N.G. Hingorani . High power electronics and flexible AC trans mission system. IEEE Power Eng. Rev.
    7. 7)
      • : `Static VAr compensators', Working Group 38-01, CIGRE, 1986, Task Force No. 2 on SVC.
    8. 8)
      • Maliszewski, R.M.: `Power flow in highly integrated transmission network', Paper No. 37-0303, CIGRE, 1990.
    9. 9)
      • Gyugyi, L.: `Advanced static VAr compensator using gate turn-off thyristors for utility applications', Paper No. 23-203, CIGRE, 1990.
    10. 10)
      • Wood, P.: `Study of improved load tap-changing for transformers and phase-angle regulators', EL-6079, EPRI Report, 1988, Project 2763-1.

Related content

This is a required field
Please enter a valid email address