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Isolated parallel UPS system with fault location detection

A fault location and associated technology, applied in fault location, fault detection by conductor type, power supply testing, etc., can solve problems such as affecting the quality of power supplied to the load, reducing the quality of power supplied to the load, etc.

Active Publication Date: 2018-03-20
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In these known systems, transients caused by UPS failures can degrade the quality of power supplied to the load
For example, in a system with a power distribution unit (PDU) isolation transformer connected between the UPS and the load, isolating the fault from the failed UPS can saturate the PDU isolation transformer, which affects the quality of power supplied to the load

Method used

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  • Isolated parallel UPS system with fault location detection
  • Isolated parallel UPS system with fault location detection
  • Isolated parallel UPS system with fault location detection

Examples

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Embodiment Construction

[0018] This specification describes an exemplary embodiment of an uninterruptible power supply (UPS) system. A plurality of UPSs are arranged in a ring bus configuration and are configured to supply power to at least one load. The UPSs are each connected to the ring bus through corresponding chokes to isolate the UPSs from each other. At least one static switch module is coupled between the associated UPS and the ring bus so that power from other UPSs can bypass the bypass choke when a fault condition occurs in the UPS. The controller is communicatively coupled to the UPS to monitor and otherwise control the UPS.

[0019] figure 1 Is a schematic diagram of an exemplary UPS system 100 for providing redundant power to a load. In an exemplary embodiment, the system 100 includes a first UPS 102, a second UPS 104, a third UPS 106, a fourth UPS 108, a first switch cabinet 110, a second switch cabinet 112, a third switch cabinet 114, and a fourth UPS. Switch cabinet 116 and ring bus ...

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PUM

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Abstract

An uninterruptible power supply (UPS) system (300) is provided. The UPS system includes a plurality of UPSs (302, 304, 306), a ring bus (314) that electrically couples the UPSs together, a static switch (340, 342, 344) coupled between an associated UPS of the UPSs and the ring bus, and a controller (200). The controller receives current data representative of an inverter current and a load currentassociated with the associated UPS. An output capacitor (606) of the associated UPS is coupled to a node that conducts the inverter current and the load current. The controller further calculates a measured current based on the received current data, determines a voltage of said output capacitor, generates a derived current based on the determined voltage and a predetermined capacitance of said output capacitor, compares the measured current and the derived current to identify a fault location, and controls said static switch based on the identified fault location.

Description

Technical field [0001] The field of the present invention relates generally to uninterruptible power supplies (UPS), and more specifically to isolated parallel toroidal busbars for interconnected UPS systems including choke bypass switches. Background of the invention [0002] A robust power system allows power to be supplied to one or more loads. Such power systems may include a combination of power generation, transmission, rectification, inversion, and conversion in order to supply energy for electronic, optical, mechanical, and / or nuclear applications and loads. When implementing power systems and architectures, practical considerations include cost, size, reliability, and ease of implementation. [0003] In at least some known power systems, one or more uninterruptible power supplies (UPS) facilitate the supply of power to the load. UPS helps to ensure that power is continuously supplied to one or more critical loads, even when one or more components of the power system fail...

Claims

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Application Information

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IPC IPC(8): H02J9/06G01R31/08
CPCG01R31/08H02J9/062G01R31/40G01R31/086H02J9/061G01R31/64H02M7/44
Inventor A.曼努奇尼L.久恩蒂尼
Owner ABB (SCHWEIZ) AG
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