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PTD T PN E R&D Dr. Plötner, 2014-08-22 01:46 Seite 1 Some technical characteristic of current-limiting reactors Airtype - reactor  linear magnetic behaviour.

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Presentation on theme: "PTD T PN E R&D Dr. Plötner, 2014-08-22 01:46 Seite 1 Some technical characteristic of current-limiting reactors Airtype - reactor  linear magnetic behaviour."— Presentation transcript:

1 PTD T PN E R&D Dr. Plötner, :46 Seite 1 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

2 PTD T PN E R&D Dr. Plötner, :46 Seite 2 limb as gapped core limb without iron core Fe-mass> Cu-mass< total mass> three limbfive limb height> Z0 / Z1 ~ 0.8< 1 core induction: - low for short-circuit limiting - normal for power flow controlling (post-failure application) Design of oil-type current-limiting reactors

3 PTD T PN E R&D Dr. Plötner, :46 Seite 3 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  …

4 PTD T PN E R&D Dr. Plötner, :46 Seite 4 Inductance over current for ConEdison New York

5 PTD T PN E R&D Dr. Plötner, :46 Seite 5 Inductance over current for „Elstree DR2“ (400 MVA)

6 PTD T PN E R&D Dr. Plötner, :46 Seite 6 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, A  current density: 3,6 A/mm^2

7 PTD T PN E R&D Dr. Plötner, :46 Seite 7 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, A  current density: 2,3 (4,3) A/mm^2

8 PTD T PN E R&D Dr. Plötner, :46 Seite 8 Test capability of the Nuremberg plant for heat-run test reactive power for compensation (C-battery): 2 x 97 MVAr generator power 1~: 16 MVA generator power 3~: 26 MVA whole power for compensation 1~: 210 MVAr whole power for compensation 3~: 220 MVAr max. AC-current C-battery: 2500A max. AC-current generator: 300A max. AC-current: 2800A max. DC-current: 4000A (voltage 1.5kV)


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