Natural Frequency Based Protection for Star-Connected Multiterminal VSC-HVDC Transmission Lines
محل انتشار: هشتمین همایش پژوهش های نوین در علوم و فناوری
سال انتشار: 1395
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 515
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شناسه ملی سند علمی:
EMAA08_049
تاریخ نمایه سازی: 4 مهر 1396
چکیده مقاله:
In this paper, a fault locating method based on natural frequency has been proposed for VSC-HVDC star-connected multi-terminal lines. When fault occurs at the transmission lines, some transient travelling waves appear by the form of a frequency spectrum in the voltage and current signals and propagates from the fault location to the both sides of the line. In this method, by measuring the current signals at each terminal without the need of determining the arrive time of transient waves and synchronous link to other terminals, the fault-produced frequency spectrum could be determined at each terminal and then by determining the dominant frequency component and calculating the velocity of the waves at each line, the faulty terminal and fault location would be detected. To determine the dominant frequency component, Fourier transform analysis (FFT) was used in this algorithm. Simulation results show that the proposed method is satisfactory and with appropriate accuracy and speed is able to determine the occurred faults on the protected lines.
کلیدواژه ها:
نویسندگان
Amir Kalantari
Production Technology Research Institute (PTRI) of Iranian Academi Center for Education, culture and Research (ACECR) of Khuzestan, Ahwaz, Iran,
Seyyed Ghodratollah Seifossadat
Electrical Department of Engineering Faculty, Shahid Chamran University, Ahwaz, Iran
Hossein Emami
Production Technology Research Institute (PTRI) of Iranian Academi Center for Education, culture and Research (ACECR) of Khuzestan, Ahwaz, Iran
Alireza Sina
Production Technology Research Institute (PTRI) of Iranian Academi Center for Education, culture and Research (ACECR) of Khuzestan, Ahwaz, Iran