1 / 8

140 likes | 640 Vues

Some technical characteristic of current-limiting reactors. Airtype - reactor linear magnetic behaviour (L - constant) spreading magnetic field around reactor (weak EMC behaviour) damping of reactor noise is difficult space consuming earth-quake withstand capability expensive

Télécharger la présentation
## Some technical characteristic of current-limiting reactors

**An Image/Link below is provided (as is) to download presentation**
Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.
Content is provided to you AS IS for your information and personal use only.
Download presentation by click this link.
While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.
During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

**Some technical characteristic of current-limiting reactors**• Airtype - reactor • linear magnetic behaviour (L - constant) • spreading magnetic field around reactor (weak EMC behaviour) • damping of reactor noise is difficult • space consuming • earth-quake withstand capability expensive Oiltype – reactor • nonlinear magnetic behaviour for high currents (L – decreasing at high currents) • almost no electromagnetical radiation outside tank • antinoise damping can easily be provided by enclosure or by tank wall damping • cooling equipment (radiator bank) free placeable**Design of oil-type current-limiting reactors**• limb as gapped core limb without iron core • Fe-mass > • Cu-mass < • total mass > • three limb five limb • height > • Z0 / Z1 ~ 0.8 < 1 • core induction: - low for short-circuit limiting • - normal for power flow controlling (post-failure application)**Initial issues to be discussed**• application • comparison between oil-type and dry-type - noise request - EMC - space available - impedance (L-I-curve, symmetry between phases) - earth-quake conditions • range of magnetic linearity -> impedance at normal and at short-circuit cond. • zero-sequence impedance • available current level for heat-run test • …**Example: 3~ series reactor for NGCT „Elstree DR2“**• application: post-failure load-flow control • cooling: ODAF • throuput power: 2000 MVAR • reactor power: 400 MVAR • nominal current: 2887 A, system voltage: 400 kV • induction: 1,3 T @ 2887 A • current density: 3,6 A/mm^2**Example: 3~ series reactor for ConEdison in New York**• application: short-circuit current limitation and load-flow control • cooling: ONAN • throuput power: 358 MVAR • reactor power: 64 MVAR • nominal current: 1500 A / 2800A / 7500 A, system voltage: 138 kV • induction: 0,37 T @ 1500 A • current density: 2,3 (4,3) A/mm^2

More Related