ارایه طرح حفاظتی پایلوت جدید برای خطوط انتقال در شبکه های انرژی سبز دارای منابع تجدیدپذیر انرژی از نوع توربین بادی
محورهای موضوعی : مهندسی برق قدرت
1 - دانشکده مهندسی برق، دانشگاه صنعتی سهند تبریز، تبریز، ایران
2 - دانشکده مهندسی برق، دانشگاه صنعتی سهند تبریز، تبریز، ایران
کلید واژه: خطوط انتقال, تداخل بار, رله دیستانس, توربین بادی, امپدانس پایلوت,
چکیده مقاله :
خطوط انتقال نقش حیاتی در سیستم‌های قدرت دارد زیرا مسیری برای انتقال توان بین تولیدکننده و مصرف‌کننده را تامین می‌کند. احتمال وقوع خطا در خطوط انتقال بخصوص در حضور تولیدات پراکنده بسیار بالا است. امروزه وجود منابع تولیدات پراکنده علاوه بر مزایایی که دارد باعث تغییراتی در رفتار بخش‌های مختلف سیستم‌های قدرت از جمله سیستم حفاظتی شده است. این تغییرات شامل افزایش سطح جریان اتصال کوتاه و عملکرد نادرست زون 3 رله دیستانس در هنگام تداخل بار می¬شود. در این مقاله با استفاده از مولفه‌های توالی مثبت، منفی و صفر فازور ولتاژ و جریان دو باس ابتدا و انتهای خطوط، الگوریتم جدیدی مبتنی بر امپدانس پایلوت در حضور تولیدات پراکنده از نوع توربین بادی ارایه شده است که توان هر کدام از توربین‌های بادی 5/2 مگاوات است. این الگوریتم در سیستم 39 باسه IEEE در نرم‌افزار DIgSILENT آزمایش شده است. امپدانس پایلوت مذکور معیار تشخیص خطا را در برابر انواع خطا، مکان وقوع خطا، تداخل بار و نوسان توان تعیین می‌کند.
Transmission lines play a critical role in power systems as they provide the pathway for transferring the power from the generation to the consumption. The probability of faults occurring in transmission lines, especially in the presence of distributed generations (DGs), is significantly high. Nowadays, the presence of DG sources, in addition to the advantages it has, also causes changes in the behavior of various parts of power systems, including the protection system. These changes include increased short-circuit current levels and incorrect operation of the zone 3 of the distance relay during load interferences. This paper presents a new pilot impedance-based algorithm using positive, negative, and zero sequences components of the phasors of the voltage and the current of the two buses located at the beginning and the end of lines in the presence of wind turbines with a production capacity of 2.5 MW. This algorithm has been tested on the IEEE 39-bus test system in the DIgSILENT software. The said pilot impedance determines the fault detection criteria against all types of faults, the location of faults, load interferences and power swings.
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