IN2015DN00125A - - Google Patents

Info

Publication number
IN2015DN00125A
IN2015DN00125A IN125DEN2015A IN2015DN00125A IN 2015DN00125 A IN2015DN00125 A IN 2015DN00125A IN 125DEN2015 A IN125DEN2015 A IN 125DEN2015A IN 2015DN00125 A IN2015DN00125 A IN 2015DN00125A
Authority
IN
India
Prior art keywords
factor
phase
waveform
waveform symmetry
transformer
Prior art date
Application number
Inventor
Wei Chen
lei ming Qin
Shu De Chen
Di Jun Gao
jin hui Li
Chun Rao
Min Yang
Original Assignee
Siemens Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Ag filed Critical Siemens Ag
Publication of IN2015DN00125A publication Critical patent/IN2015DN00125A/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
    • H02H1/043—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks to inrush currents
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/10—Measuring sum, difference or ratio
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
    • G01R19/0053—Noise discrimination; Analog sampling; Measuring transients
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
    • H02H7/045—Differential protection of transformers

Abstract

The present invention proposes a magnetizing inrush current detection method and device for a transformer. The method comprises: obtaining (S210) a difference current i(n) for each AC phase of the transformer; calculating (S230), for each AC phase at least two factors (Ax(n) Bx(n)) for waveform symmetry recognition on the basis of the difference currents obtained within one period; for each type of factor obtaining (S240) the maximum value of the three factors corresponding to the three AC phases to serve as a maximum phase factor of that factor; based on the maximum phase factor obtained using a waveform symmetry recognition algorithm (S250) to calculate a corresponding waveform symmetry parameter k; and if the waveform symmetry parameter k meets a requirement for waveform asymmetry (S260) then determining that a magnetizing inrush current has occurred.
IN125DEN2015 2012-08-31 2013-08-06 IN2015DN00125A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201210320886.9A CN103675415B (en) 2012-08-31 2012-08-31 Excitation surge current detection method, braking magnetizing inrush current method and its device
PCT/EP2013/066451 WO2014032915A1 (en) 2012-08-31 2013-08-06 Magnetizing inrush current detection method, magnetizing inrush current restraint method and device

Publications (1)

Publication Number Publication Date
IN2015DN00125A true IN2015DN00125A (en) 2015-05-29

Family

ID=48998578

Family Applications (1)

Application Number Title Priority Date Filing Date
IN125DEN2015 IN2015DN00125A (en) 2012-08-31 2013-08-06

Country Status (6)

Country Link
US (1) US20150204918A1 (en)
EP (1) EP2891216B1 (en)
CN (1) CN103675415B (en)
BR (1) BR112015002982A2 (en)
IN (1) IN2015DN00125A (en)
WO (1) WO2014032915A1 (en)

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US9891289B2 (en) 2014-06-03 2018-02-13 Cooper Technologies Company Power transformer inrush current detector
CN104133144B (en) * 2014-08-04 2017-04-12 昆明理工大学 Magnetizing inrush current discrimination method based on differential current wavelet packet decomposition
CN104362590B (en) * 2014-10-08 2018-05-04 许继集团有限公司 Main transformer divides the recognition methods of side differential protection public winding CT progress of disease exceptions
CN104332953B (en) * 2014-11-20 2018-08-07 国网江苏省电力有限公司扬州供电分公司 A kind of excitation surge current combination blocking method based on waveform symmetry
JP6351537B2 (en) * 2015-04-20 2018-07-04 三菱電機株式会社 Signal processing device, signal processing method, and power system protection device
CN104810795B (en) * 2015-04-30 2017-10-24 国家电网公司 A kind of modified excitation surge current discrimination method
CN105186446B (en) * 2015-07-08 2018-02-06 国网上海市电力公司 A kind of circuit identifiers and recognition methods based on Euclidean distance
CN105137166B (en) * 2015-09-09 2017-11-28 乐晓蓉 Power system excitation inrush current identification method
CN105262051B (en) * 2015-09-29 2018-01-16 湖南大学 Transformer excitation flow discrimination method based on sample sequence absolute value partial velocities
EP3157112A1 (en) * 2015-10-12 2017-04-19 General Electric Technology GmbH Improvements in or relating to the protection of power transformers
CN105223450B (en) * 2015-11-02 2018-06-26 乐晓蓉 Transformer core state on_line monitoring method
CN105870892A (en) * 2016-04-29 2016-08-17 国网辽宁省电力有限公司鞍山供电公司 Line protection method capable of avoiding closing inrush current
CN106324328B (en) * 2016-08-09 2019-01-29 华南理工大学 A kind of transformer excitation flow recognition method based on morphology cascade erosion operation
CN107765077B (en) * 2016-08-19 2021-01-15 中国电力科学研究院 Magnetizing inrush current identification method and device
CN106505523B (en) * 2016-11-15 2019-05-03 国家电网公司 A kind of excitation flow recognition method suitable for Traction networks transformer
DE102016124233A1 (en) 2016-12-13 2018-06-14 TRUMPF Hüttinger GmbH + Co. KG Protection arrangement for protecting a transformer and method for protecting a transformer
EP3396802B1 (en) * 2017-04-26 2021-12-29 ABB S.p.A. A method for identifying a fault event in an electric power distribution grid sector
CN107765065B (en) * 2017-09-06 2020-07-28 西安理工大学 Fundamental wave attenuation factor-based power distribution network magnetizing inrush current identification method
CN110705031B (en) * 2019-09-06 2021-07-06 西南交通大学 Excitation inrush current identification method based on second-order Taylor coefficient
CN110829371B (en) * 2019-11-09 2021-08-03 天津大学 Magnetizing inrush current identification method based on waveform similarity of circular current and zero sequence current
CN111103481A (en) * 2019-12-11 2020-05-05 国家电网有限公司 Method for identifying magnetizing inrush current of transformer
CN111525510B (en) * 2020-05-06 2021-11-26 中国大唐集团科学技术研究总院有限公司华东电力试验研究院 Excitation inrush current evaluation method and device based on Lagrange interpolation method
CN111969556B (en) * 2020-08-13 2022-07-26 广东电网有限责任公司 Excitation inrush current judgment method and judgment device
CN112698246A (en) * 2020-12-31 2021-04-23 中国电力科学研究院有限公司 Transformer excitation inrush current identification method and device based on current abrupt change
CN112787308B (en) * 2021-01-25 2022-03-29 华南理工大学 Differential protection method, system and medium for transformer based on differential current duty ratio
CN113178851B (en) * 2021-05-19 2022-09-27 中国南方电网有限责任公司超高压输电公司天生桥局 Method for solving overlarge excitation surge current of flexible direct-current connection transformer
CN113836071B (en) * 2021-11-26 2022-02-22 苏州浪潮智能科技有限公司 Self-correcting circuit and signal self-correcting method
CN115882432B (en) * 2023-03-02 2023-05-23 山东大学 Active injection type harmonic current differential protection method and system for power distribution network containing IIDG
CN117117789B (en) * 2023-10-24 2024-01-30 国家电网有限公司西北分部 Transformer protection method and device

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CN1037392C (en) * 1995-11-24 1998-02-11 孙志杰 Transformer differential protection of wave mode symmetrical method
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CN1129221C (en) * 2001-01-22 2003-11-26 南京南瑞继保电气有限公司 Relay protection method based on excitation impedance variation to judge excitating surge current of transformer
CN100336275C (en) * 2004-05-14 2007-09-05 清华大学 Transformer differential protection method based on virtual magnetic flux-differential current characteristics
CN100492797C (en) * 2006-10-16 2009-05-27 北京交通大学 Waveform sine principle based transformer excitation flow recognition method
CN101257208A (en) * 2007-12-21 2008-09-03 清华大学 Method for identifying transformer excitation surge current
CN101764391B (en) * 2009-08-20 2012-10-03 北京四方继保自动化股份有限公司 Method and system for braking magnetizing inrush current in differential protection of ultra-high voltage transformer
US8937822B2 (en) * 2011-05-08 2015-01-20 Paul Wilkinson Dent Solar energy conversion and utilization system
US9891289B2 (en) * 2014-06-03 2018-02-13 Cooper Technologies Company Power transformer inrush current detector

Also Published As

Publication number Publication date
CN103675415B (en) 2017-03-01
EP2891216B1 (en) 2020-04-01
CN103675415A (en) 2014-03-26
WO2014032915A1 (en) 2014-03-06
EP2891216A1 (en) 2015-07-08
BR112015002982A2 (en) 2017-10-10
US20150204918A1 (en) 2015-07-23

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