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Online protection coordination for distribution management system

A power system and fault protection technology, applied in the field of power system, can solve the problems of inability to operate during faults, misoperation and tripping, etc.

Active Publication Date: 2014-04-16
HITACHI ENERGY SWITZERLAND AG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In new configurations created by the automatic recovery system, these devices may not operate during a fault or may misoperate during normal operating conditions and produce unfavorable trips

Method used

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  • Online protection coordination for distribution management system
  • Online protection coordination for distribution management system
  • Online protection coordination for distribution management system

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Embodiment Construction

[0023] In the appended claims and the following discussion, terms such as "first", "second", etc. are used to distinguish between several similar elements, regions, sections, etc., and unless the context clearly dictates otherwise, the above terms are not intended to To imply a particular order or priority. Also as used herein, the terms "having", "containing", "comprising", "including" and the like are open-ended terms which indicate the presence of stated elements or features but do not exclude additional elements or features. The articles "a", "an" and "the" are intended to include plural as well as singular unless the context clearly dictates otherwise. Like terms refer to like elements throughout the specification.

[0024] As stated above, the system flexibility provided by new smart grid technologies introduces some new issues into system operation. Specifically, automatic network reconfiguration may create situations where intelligent electronic devices (IEDs) such a...

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Abstract

A method for automatic protection coordination in a power system network comprises identifying radial source-to-load paths and fault protection devices in the source-to-load paths, for a portion of the power system network to be coordinated. Device settings data for fault protection devices are retrieved, including multiple preconfigured settings for some devices. Fault currents for each of multiple possible electrical faults in said portion of the power system network are predicted, and a selectivity check for each pair of fault protection devices that are adjacent to one another in an identified radial source-to-load path is performed, for each of one or more of the predicted fault currents, taking into account multiple preconfigured settings for remotely controllable fault protection devices. A combination of settings for remotely controllable fault protection devices that minimizes selectivity violations among the pairs is selected, and necessary change-setting commands are sent to remotely controllable fault protection devices.

Description

[0001] relevant application [0002] This application claims the benefit of and priority to US Application Serial No. 13 / 649,701, filed October 11, 2012. The entire content of said application is hereby incorporated by reference. technical field [0003] The present application relates to power systems, and more particularly to techniques for providing coordinated fault protection and distribution system restoration. Background technique [0004] Electric utilities in the United States and around the world are currently upgrading their distribution systems to simplify and automate system operations by implementing enhanced monitoring, distribution automation and control solutions. As stated by many utilities in their roadmaps towards the so-called smart grid, the ultimate goal from a distribution system operations point of view is a smart self-healing grid. In the event of a disruption, these grids should be capable of automatic isolation of permanent faults and automatic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00
CPCG06F11/07H02H7/28H02H3/006H02H7/30H02J3/00125
Inventor D·伊什切恩科李朝J·D·斯托皮斯M·巴斯W·L·彼得森M·G·威克拉玛塞卡拉
Owner HITACHI ENERGY SWITZERLAND AG
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