تشخیص خطا در خطوط انتقال با استفاده از توان اکتیو لحظه‌ای سه‌فاز و میانگیری متحرک

نویسندگان

1 دانشگاه شیراز - دانشکده مهندسی برق و کامپیوتر

2 دانشگاه شیراز - دانشکده فناوری‌های نوین

چکیده

در شرایط وقوع خطا در خطوط انتقال، الگوریتم‌های متداول حفاظتی ابتدا وقوع خطا را تشخیص داده سپس نوع آن را مشخص می‌کنند و در مرحله آخر مکان خطا تخمین زده می‌شود. شناسایی هرچه سریع‌تر خطا کمک می‌کند تا اقدامات بعدی سریع‌تر صورت گیرد. در این مقاله روشی جدید برای تشخیص خطا در خطوط انتقال با استفاده از توان اکتیو لحظه‌ای سه‌فاز و میانگیری متحرک ارائه شده است. سیگنال توان لحظه‌ای سه‌فاز از مجموع توان‌های لحظه‌ای هر فاز به‌دست می‌آید. این سیگنال در شرایط عملکرد عادی شبکه مقدار ثابتی دارد اما به‌هنگام وقوع خطا، تغییرات قابل ملاحظه‌ای خواهد داشت. این تغییرات با استفاده از میانگیری متحرک شناسایی می‌گردد. روش تشخیص خطای پیشنهادی در پنج سیستم مختلف مورد ارزیابی قرار گرفته که نتایج نشان‌دهنده سرعت بالا و دقت کافی روش است. کارایی روش پیشنهادی با هفت روش مشابه دیگر مقایسه گردیده و نقاط قوت و ضعف هرکدام مشخص شده است.

کلیدواژه‌ها

عنوان مقاله [English]

Fault Detection in Transmission Lines Using Three-Phase Instantaneous Active Power and Moving Average

نویسندگان [English]

  • M. A. Jarrahi 1
  • H. Samet 1
  • T. Ghanbari 2
1 School of Electrical and Computer Engineering, Shiraz University, Shiraz, Iran
2 School of Advanced Technologies, Shiraz University, Shiraz, Iran
چکیده [English]

When a fault occurs in transmission line, first it should be detected, then the type of the fault should be recognized and in final step, location of the fault should be estimated. Fault detection as fast as possible helps to do the whole procedure faster. In this paper, a novel method for transmission line fault detection based on three-phase instantaneous active power and moving average technique is proposed. Three-phase instantaneous active power signal is the total of instantaneous active power for each phase. This signal is constant during normal operation of the network but in fault situation, some changes will happen and by utilization of moving average concept, the fault can be detected. The proposed fault detection method is evaluated in five different systems and the results denote the high accuracy and quickness of the proposed approach. For validation of the suggested method, a comparison is carried out with seven similar previous methods.

کلیدواژه‌ها [English]

  • Fault Detection
  • distance relay
  • three phase instantaneous active power
  • transmission line

مراجع

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