کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
704012 891183 2011 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Selection of minimal tripping times for distance protection using fault trees with time dependencies
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
Selection of minimal tripping times for distance protection using fault trees with time dependencies
چکیده انگلیسی

Correct coordination between protection relays is an essential requirement to maintain stability and integrity of electrical power systems. Time settings of protection relays have to be adapted to time characteristics of electrical power systems and time settings of other protections. In the paper, fault trees with time dependencies (FTTD) are used for selecting time delay settings of remote back-up distance protections. In FTTD, events and gates are characterized by time parameters, which are derived from time characteristics of protection devices and the inherent delays of protection equipment. Two case studies are presented. First, the coordination of protections for the simple transmission line composed of two identical sections is studied. Next, the transmission line that contains two sections of different lengths and transformer between them is analyzed. In both cases, formulae for time delays of protections are derived. According to calculations executed for the first case, our method gives time delays that often are significantly smaller than values suggested by generally recommended and accepted rules.


► We present two case studies of the transmission lines (TL).
► First, the coordination of protections for the simple TL composed of two sections.
► Next, the TL that contains two sections of different lengths and transformer.
► Formulae for time delays of protections are derived.
► Our method gives smaller time delays values than those suggested by general rules.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electric Power Systems Research - Volume 81, Issue 7, July 2011, Pages 1556–1571
نویسندگان
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