Improving the operation of earth fault relays by auto earthing-connection at earth fault situations in 6kV mining grid of Quang Ninh

• Autorzy: Bun Ho Viet , Thanh Le Xuan

Identyfikatory

DOI

10.29227/IM-2019-02-57

Warianty tytułu

PL

Poprawa działania przekaźników ziemnozwarciowych poprzez automatyczne połączenie uziemiające w sieci górniczej 6kV w Quang Ninh

• Konferencja: POL-VIET 2019 : scientific-research cooperation between Poland and Vietnam : 08–10.07.2019, Krakow
• Języki publikacji: EN

Abstrakty

EN

Single phase earth-fault in MV grids usually causes overvoltage that harm to human being and electric equipments. In 6kV mining grids of Vietnam, earth fault which is majority incident accounts 55% to 73% of the total faults. When earth fault occurs many grids’ eco-technical parameters will be affected. Moreover, the overvoltage and earthing current can lead to serious electric shock accidents caused mainly by stepping-overvoltage or touching-overvoltage. One of earthing relays requirements is to trip in minimum time duration in order to reduce the magnitude of earthing currents and overvoltage. Base on the simulation in Matlab, the paper suggests a prior connection diagram that allows an auto earthing-connection for improving the better performance of relays. The utilization of the diagram will help to decrease the tripping time of relays, reduce the amplitude of internal overvoltage as well as enhance the safety for human being in case of earthing incidents.

Słowa kluczowe

EN

mining; Vietnam; grids

PL

górnictwo; Wietnam; przekaźniki

• Wydawca: Polskie Towarzystwo Przeróbki Kopalin
• Czasopismo: Inżynieria Mineralna
• Rocznik: 2019
• Tom: R. 21, nr 2/2
• Strony: 52--57
• Opis fizyczny: Bibliogr. 5 poz., rys., wykr.

Twórcy

autor

Bun Ho Viet

• HUMG Hanoi University of Mining and Geology, Faculty of Electromechanic, Hanoi, Vietnam

autor

Thanh Le Xuan

• HUMG Hanoi University of Mining and Geology, Faculty of Electromechanic, Hanoi, Vietnam

Bibliografia

• 1. Ho Viet Bun, “Reasearch and evaluate overvoltage transience caused by single phaseground failures in Cam Pha-Quang Ninh underground mines' 6kV grid”, International conferrence of Advanced in Mining and Tunelling 21-22 October 2014, Vung Tau, Viet Nam, pp. 409-411
• 2. Ho Viet Bun (2015), “Research for determining 6kV gird’s insulation indicators in Quang Ninh open pit coal mines”, Second international conference on scientific research cooperation between Vietnam and Poland in earth sciences (VIET-POL 2015), pp. 507-513
• 3. Сирота, И.М., Кисленко, С.Н., Михайлов, А.М. Режимы нейтрали электрических сетей/– Киев: Наук. думка, 1985. – 264 с.
• 4. Гуревич, В.И. Некоторые технические аспекты проблемы защиты от замыканий на землю распределительных сетей среднего напряжения/ - журнал «Промышленная энергетика», № 1 – 2001
• 5. Серов В.И, Щуцкий В.И, Ягудаев Ƃ.M. Методы и средства борьбы с замыканиями на землю в высоковольтных системах горных предприятий, Мockba “Наука” 1985

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).