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Protection relay system against single-phase faults for medium-voltage distribution networks

A power distribution network, single-phase technology, applied in the direction of automatic disconnection emergency protection devices, information technology support systems, emergency protection circuit devices, etc., can solve problems such as complex fault areas

Inactive Publication Date: 2014-04-09
SCHNEIDER ELECTRIC IND SAS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Determining the area of ​​failure in this type of network then becomes a complex task

Method used

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  • Protection relay system against single-phase faults for medium-voltage distribution networks
  • Protection relay system against single-phase faults for medium-voltage distribution networks
  • Protection relay system against single-phase faults for medium-voltage distribution networks

Examples

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Embodiment Construction

[0028] according to figure 1 In the illustrated embodiment of the invention, the electrical energy distribution network comprises a medium voltage feeder 1 having an upstream end and a downstream end. The upstream end is intended to be connected to a power source 2 , thus allowing power distribution along the distribution direction 3 . The power source 2 may be formed by a high voltage to medium voltage substation (HV / MV). HV / MV substations represent the interface between the high-voltage transmission network and the medium-voltage distribution network. The HV / MV substation also includes HV / MV transformers, incoming feeders, busbars, and outgoing feeders.

[0029] The system also includes at least two protectors deployed in the feeder 1 . In the following description, and to simplify the notes on the different protectors deployed in feeder 1, it is considered that the protectors form a series of n protectors, n being an integer greater than or equal to 2, and each protector...

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Abstract

The electrical power distribution network comprises a medium-voltage feeder (1) having an upstream end intended to be connected to a power source (2). The feeder (1) includes at least first and second consecutive protection relays (Pi, P<i+1>) positioned along the feeder and defining the ends of a first element (Oi) to be monitored. The first protection relay (Pi) includes a search module (Mi) configured to trip a breaker (Ci) to interrupt the electrical power distribution: after a first time delay (Ti1) when the search module (Mi) detects a single-phase permanent fault (D) in a monitoring area (Li) of the first element (Oi); and after a second time delay (Ti2) longer than the first time delay (Ti1) when the search module detects a single-phase permanent fault (D) in an additional monitoring area (L'i) located downstream of the area (Li).

Description

technical field [0001] The invention relates to an electrical energy distribution network of a medium voltage feeder having an upstream end intended to be connected to a power source and a downstream end. Background technique [0002] The transmission of electrical energy from the production center to the customer is organized on two main levels. The first level corresponds to high voltage transmission grids (HV) with phase-to-phase voltages typically greater than 50 kV. High-voltage transmission grids are intended to transport electrical energy from production centers and power plants to distribution centers serving electricity-consuming regions. The second level corresponds to medium-voltage distribution networks (MV) with phase-to-phase voltages typically below 50kV. The medium voltage distribution network is able to locally transmit electrical energy from distribution centers to end customers. [0003] The current electricity distribution network continues to evolve. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26
CPCY04S10/20Y02E60/725H02H3/027H02H3/40
Inventor C.杰库P.埃利伯特B.莱森O.奇拉德
Owner SCHNEIDER ELECTRIC IND SAS