Abstract




 
   

IJE TRANSACTIONS C: Aspects Vol. 31, No. 12 (December 2018) 1963-1964   

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  FAULT LOCATION ON COMPENSATED TRANSMISSION LINES WITHOUT CURRENT MEASUREMENT
 
K. Gorgani Firouzjah
 
( Received: July 09, 2018 – Accepted: November 26, 2018 )
 
 

Abstract    This paper presents a novel fault location method for series compensated transmission lines. It is established based on synchronized voltages sampling and Thevenin impedance from both ends of series compensated transmission line. The method is based on the use of phasor measurement units (PMU) technology which is aimed to be independent of current measurements, fault type, fault resistance, fault inception angle and line loading angle. This method includes two subroutines for the faults located on the right and left sides of series capacitor (SC). Lumped modeling is considered for compensated transmission line with SC equipped with metal oxide varistor (MOV) arrester. The nonlinear behavior of SC-MOV system is investigated in the analysis. Proposed current independent fault location algorithm has been thoroughly tested using signals taken from ATP/EMTP simulations. According to the results, the percentage errors for the fault distances estimation are in proper ranges.

 

Keywords    Fault location, series compensated, synchronized voltage measurement, current transformer elimination, series capacitor

 

چکیده    در این مقاله روشی جدیدی برای محل­یابی خطا در خطوط جبران شده سری ارائه شده است. روش ارائه‌شده بر پایه اندازه‌گیری ولتاژ دو پایانه خط و مدل تونن شبکه در دو انتها استوار شده است. فرمول‌بندی مسئله مبتنی بر تکنیک اندازه‌گیری ولتاژ است، به‌گونه‌ای که سهم مقاله را در عدم وابستگی روابط به جریان هنگام خطا مشخص می‌نماید. الگوریتم پیشنهادی در دو زیر الگوریتم پایه‌ریزی شده است. با روابط ارائه‌شده، در مرحله اول ابتدا سمت خطا نسبت به خازن شناسایی شده و سپس با استفاده از زیر الگوریتم مربوطه، تخمین محل خطا صورت می‌پذیرد. مدل‌سازی خط انتقال جبران شده در یک شبکه دو ترمینال و با ملاحظه رفتار غیرخطی عنصر جبران سازی موازی خازن (برق‌گیر) به انجام می‌رسد. راست آزمایی روابط و ارزیابی دقت تخمین محل خطا از طریق نتایج شبیه‌سازی در نرم‌افزار EMTP صورت می‌پذیرد. قابلیت روش در بهره گیری از روابط کلاسیک با دقت و سرعت پردازش سریع است.

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