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Power Flow and Stability Control Using an Integrated HV Bundle-Controlled Line-Impedance Modulator

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5 Author(s)
Couture, P. ; Hydro-Quebec Res. Inst. (IREQ), Varennes, QC, Canada ; Brochu, J. ; Sybille, G. ; Giroux, P.
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This paper presents a flexible ac transmission system device under development for the management of power flow under steady-state and dynamic conditions, the bundle-controlled line-impedance modulator (LIM). In its simplest form, an LIM is made of switching modules connected in series with transmission-line segments whose bundles have subconductors insulated from each other. A module contains one switch in series with each subconductor of a bundle and the modules are anchored to dead-end towers in place of yoke plates. Together, with the measurement of sensors and controls, these modules can be used to change series impedances of transmission lines and implement functions, such as deicing, power-flow control, stability control, and line monitoring. In order to illustrate the LIM capabilities, two load-flow studies and one stability study are presented in this paper. Finally, the LIM performance is qualitatively compared to the thyristor-controlled series compensator technology.

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Power Delivery, IEEE Transactions on  (Volume:25 ,  Issue: 4 )