A Current-based Differential Technique to Detect Loss of Field in Synchronous Generators

Abbas Hasani, Farhad Haghjoo, Filipe Miguel Faria da Silva, Claus Leth Bak

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

A new approach for generator loss of field (LOF)
protection is proposed by estimating the field current based on
the generator measurable parameters. The main idea of the
proposed approach is that a significant difference will be created
between the measured excitation and the estimated field currents
during LOF occurrence. A differential index is introduced to
monitor such difference and consequently to detect LOF failures.
A detailed and realistic field circuit is considered for the
generator by using the phase domain model of the generator in
the real-time-digital-simulator; while different types of LOF
events can be simulated through such model, as well. The
obtained results show that the presented technique can detect
various types of LOF events much faster than the conventional
impedance-based scheme. Moreover, it exhibits more security
than the conventional technique in the face of power system
disturbances (e.g. stable power swing and out of step conditions)
OriginalsprogEngelsk
TidsskriftI E E E Transactions on Power Delivery
Sider (fra-til)1-9
Antal sider9
ISSN0885-8977
DOI
StatusAccepteret/In press - apr. 2019

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Synchronous generators
Simulators
Networks (circuits)

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    Citer dette

    @article{75617871b2ed4fcbafe0829178e57568,
    title = "A Current-based Differential Technique to Detect Loss of Field in Synchronous Generators",
    abstract = "A new approach for generator loss of field (LOF)protection is proposed by estimating the field current based onthe generator measurable parameters. The main idea of theproposed approach is that a significant difference will be createdbetween the measured excitation and the estimated field currentsduring LOF occurrence. A differential index is introduced tomonitor such difference and consequently to detect LOF failures.A detailed and realistic field circuit is considered for thegenerator by using the phase domain model of the generator inthe real-time-digital-simulator; while different types of LOFevents can be simulated through such model, as well. Theobtained results show that the presented technique can detectvarious types of LOF events much faster than the conventionalimpedance-based scheme. Moreover, it exhibits more securitythan the conventional technique in the face of power systemdisturbances (e.g. stable power swing and out of step conditions)",
    keywords = "Synchronous generator, loss of field detection, Real-time-digital-simulator, stable power swing, out of step",
    author = "Abbas Hasani and Farhad Haghjoo and Silva, {Filipe Miguel Faria da} and Bak, {Claus Leth}",
    year = "2019",
    month = "4",
    doi = "10.1109/TPWRD.2019.2910460",
    language = "English",
    pages = "1--9",
    journal = "I E E E Transactions on Power Delivery",
    issn = "0885-8977",
    publisher = "IEEE",

    }

    A Current-based Differential Technique to Detect Loss of Field in Synchronous Generators. / Hasani, Abbas ; Haghjoo, Farhad; Silva, Filipe Miguel Faria da; Bak, Claus Leth.

    I: I E E E Transactions on Power Delivery, 04.2019, s. 1-9.

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    TY - JOUR

    T1 - A Current-based Differential Technique to Detect Loss of Field in Synchronous Generators

    AU - Hasani, Abbas

    AU - Haghjoo, Farhad

    AU - Silva, Filipe Miguel Faria da

    AU - Bak, Claus Leth

    PY - 2019/4

    Y1 - 2019/4

    N2 - A new approach for generator loss of field (LOF)protection is proposed by estimating the field current based onthe generator measurable parameters. The main idea of theproposed approach is that a significant difference will be createdbetween the measured excitation and the estimated field currentsduring LOF occurrence. A differential index is introduced tomonitor such difference and consequently to detect LOF failures.A detailed and realistic field circuit is considered for thegenerator by using the phase domain model of the generator inthe real-time-digital-simulator; while different types of LOFevents can be simulated through such model, as well. Theobtained results show that the presented technique can detectvarious types of LOF events much faster than the conventionalimpedance-based scheme. Moreover, it exhibits more securitythan the conventional technique in the face of power systemdisturbances (e.g. stable power swing and out of step conditions)

    AB - A new approach for generator loss of field (LOF)protection is proposed by estimating the field current based onthe generator measurable parameters. The main idea of theproposed approach is that a significant difference will be createdbetween the measured excitation and the estimated field currentsduring LOF occurrence. A differential index is introduced tomonitor such difference and consequently to detect LOF failures.A detailed and realistic field circuit is considered for thegenerator by using the phase domain model of the generator inthe real-time-digital-simulator; while different types of LOFevents can be simulated through such model, as well. Theobtained results show that the presented technique can detectvarious types of LOF events much faster than the conventionalimpedance-based scheme. Moreover, it exhibits more securitythan the conventional technique in the face of power systemdisturbances (e.g. stable power swing and out of step conditions)

    KW - Synchronous generator

    KW - loss of field detection

    KW - Real-time-digital-simulator

    KW - stable power swing

    KW - out of step

    U2 - 10.1109/TPWRD.2019.2910460

    DO - 10.1109/TPWRD.2019.2910460

    M3 - Journal article

    SP - 1

    EP - 9

    JO - I E E E Transactions on Power Delivery

    JF - I E E E Transactions on Power Delivery

    SN - 0885-8977

    ER -