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Protection of inductive element

A technology of inductive components and protection components, applied in the field of uninterruptible power supply systems

Active Publication Date: 2019-08-06
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, if the circuit breaker is a vacuum circuit breaker, its opening may cause high transient voltages at the UPS module, so protection may be required

Method used

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  • Protection of inductive element
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  • Protection of inductive element

Examples

Experimental program
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Embodiment Construction

[0023] Hereinafter, a detailed description of preferred embodiments of the present invention will be given.

[0024] figure 1 A power system 10 is schematically shown providing power to a load, which may be, by way of example, a data center including a plurality of servers and a cooling system for such a data center. The power system 10 is advantageously a medium voltage (MV) multi-phase power system and receives power from a power distribution system or grid (not shown), eg via a first transformer T1 . The first transformer T1 is in turn connected to a first cable CB1 , which can also be called an upstream cable, since the load is located downstream of this cable CB1 . Multiple loads can be connected to this cable. As an example, the cable may provide a medium voltage such as 11kV.

[0025] Also, the power system 10 may be an uninterruptible power supply (UPS) system. For this reason, several UPS branches connected in parallel can be provided between the cables and the co...

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PUM

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Abstract

The invention concerns a protection arrangement (18) for a multiphase uninterruptible power supply system comprising a vacuum circuit breaker (S1a, S1b, S1c) connected in series with an inductive element (14), where the inductive element comprises, for every phase, two series-connected magnetically coupled windings (L1a, L2a, L1b, L2b, L1c, L2c) separated by a tap point (Ta, Tb, Tc).The protectionarrangement (18) comprises one first group of protective components per phase, each first group comprising a first protective component (SA1a, SA1b, SA1c) having a first end connected to a link between the vacuum circuit breaker (S1a, S1b, S1c) and the inductive element (14) and a second end connected to a corresponding tap point (Ta, Tb, Tc), where at least one protective component in each firstgroup is a surge arrester.

Description

technical field [0001] The present invention relates generally to uninterruptible power supply systems. More specifically, the present invention relates to a protection device for a multi-phase uninterruptible power supply system and a multi-phase uninterruptible power supply system comprising such a protection device. Background technique [0002] Uninterruptible power supply (UPS) systems may be used to power loads such as data centers. Such a system may be a polyphase system comprising several UPS modules between a cable connected to the grid and one or more loads, wherein the UPS modules may include an inductive element consisting of Two series magnetically coupled windings for each phase and an auxiliary power supply in the form of a converter connected to a tap point. The inductive element may be provided in the form of an autotransformer where all windings in all 3 phases are magnetically coupled to each other. [0003] Faults on the grid side, causing voltage dips...

Claims

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Application Information

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IPC IPC(8): H02H9/00H02H9/04H02H7/12
CPCH02H7/12H02H7/1216H02H9/005H02H9/04H02H9/042
Inventor J·斯文森K·伊尔维斯M·贝尼亚卡尔T·宋
Owner ABB (SCHWEIZ) AG