کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
703107 1460877 2016 4 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله
Analysis of overtravel in induction disc overcurrent relays
ترجمه فارسی عنوان
تجزیه و تحلیل overtravel در ایمپالس اضافه جریان القایی دیسک
کلمات کلیدی
دیسک القایی رله. Overtravel؛ حفاظت از سیستم توزیع، مدل سازی الکترومکانیکی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی


• Experimental results show that the equivalent overtravel time (Δt) is constant.
• Dynamic equations are analyzed, to show the root of this behavior.
• Explanation can be based on a differential equation of 1st-order or 2nd-order.
• 1st-order differential equation is very simple but it is not rigorously valid.
• 2nd-order differential equation is preferable for the sake of accuracy.

This article analyzes the overtravel in induction disc overcurrent relays. Based on experimental results, obtained from tests on three relays from different manufacturers, it is verified that the equivalent overtravel time can be considered constant for a wide range of settings in the device. Dynamic equations of the device are analyzed, in order to find the root of this behavior. This analysis was performed in two ways: by assuming a first-order differential equation, and by assuming a second-order differential equation. Both methods allow to demonstrate the fact of a constant value for the equivalent overtravel time. The method based on a first-order differential equation is very simple, and this fact is attractive from a pedagogical perspective; however, it is based on assumptions which are not rigorously valid. Thus, the method based on a second-order differential equation should be preferred for the sake of accuracy.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electric Power Systems Research - Volume 136, July 2016, Pages 8–11
نویسندگان
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