تشخیص خطاهای متقارن سه‌فاز در طی تجاوز بار مبتنی بر مؤلفه سوپرایمپوز توان مختلط برای پشتیبانی عملکرد صحیح زون3 رله‌های دیستانس

نویسندگان

1 دانشکده مهندسی برق و کامپیوتر - دانشگاه تربیت مدرس

2 دانشکده مهندسی برق - پردیس فنی مهندسی شهید عباسپور - دانشگاه شهید بهشتی

چکیده

عملکرد نامناسب زون 3 رله‌های دیستانس در شبکه انتقال طی شرایط بحرانی سیستم قدرت همچون تجاوز بار به‌عنوان یکی از عوامل مهم در تریگرشدن وقوع رخدادهای آبشاری گزارش‌شده‌اند. پدیده‌های متقارن همچون وقوع نوسان توان، تغییر توان عبوری از خطوط ناشی از خروج خطوط دیگر و ناپایداری ولتاژ می‌تواند امنیت سیستم حفاظتی را تهدید کرده و منجر به عملکرد بی‌مورد زون 3 رله دیستانس شود. چالش مهم دیگر، تشخیص سریع و مطمئن وقوع خطاهای سه‌فاز در حین وقوع تجاوز بار است. در این مقاله یک شاخص نظارتی مبتنی بر زاویه فاز مؤلفه سوپرایمپوز توان مختلط ارائه می‌گردد که از اندازه‌گیری‌های فازور سنکرون به‌دست‌آمده از دو طرف خطوط تحت پوشش زون 3 رله دیستانس استخراج می‌گردد. شاخص پیشنهادشده قادر به تشخیص سریع خطاهای سه‌فاز از تجاوز بار در بازه زمانی کمتر از یک سیکل می‌باشد. عدم تأثیرپذیری از مقاومت خطای بالا، مکان وقوع خطا، زمان وقوع خطا و جبران‌سازی سری خط از جمله ویژگی‌های کلیدی روش پیشنهادی است. عملکرد صحیح روش پیشنهادی روی سیستم استاندارد New England 39 bus  ارزیابی و مورد تأیید قرار می‌گیرد.

کلیدواژه‌ها

عنوان مقاله [English]

Three-Phase Symmetrical Fault Detection during Load encroachment based on Superimposed Component Complex Power to Support Correct Operation of Zone 3 Distance Relays

نویسندگان [English]

  • T. Ghanizadeh Bolandi 1
  • M. R. Haghifam 1
  • M. Khederzadeh 2
1 Faculty of Electrical and Computer Engineering, Tarbiat Modares University, Tehran, Iran
2 Department of Electrical Engineering, Faculty of Electrical Engineering, Shahid Beheshti University, Tehran, Iran
چکیده [English]

Inappropriate operation of zone 3 distance relays in transmission network during power system stressed condition such as load encroachment situation have reported as an important factor contributing in triggering the cascading outages. Symmetrical events such as power swing, power flow transfer resulted from line outage and voltage instability can threaten the security of protection system and cause the malopertion of zone 3 distance relay. Another challenge is the fast and dependable distinguishing the three phase faults during the load encroachment condition.  In this paper, a supervisory index is presented based on phase angle of superimposed component complex power which is extracted from synchrophasor measurements obtained from both ends of lines covered by zone 3 distance relay. The proposed index has the proficiency in fast detection of three phase faults from load encroachment in less than one cycle. Unaffected by high fault resistance, fault location,fault inception angle and series compensation capacitor are the outstanding features of the proposed index. The validity of the proposed scheme is confirmed on 39-bus New England test system.

کلیدواژه‌ها [English]

  • Static load encroachment
  • zone 3 distance relay
  • synchrophasor measurement
  • fault superimposed component

مراجع

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مجله مهندسی برق دانشگاه تبریز
دوره 49، شماره 1 - شماره پیاپی 87
اردیبهشت 1398
صفحه 367-380

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