دانلود مقاله ISI انگلیسی شماره 54413
ترجمه فارسی عنوان مقاله

رله فاصله سریع جدید برای خطوط انتقال طولانی

عنوان انگلیسی
A novel fast distance relay for long transmission lines
کد مقاله سال انتشار تعداد صفحات مقاله انگلیسی
54413 2014 6 صفحه PDF
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : International Journal of Electrical Power & Energy Systems, Volume 63, December 2014, Pages 681–686

ترجمه کلمات کلیدی
جفت شدگی ترانسفورماتور ولتاژ خازنی؛ حفاظت از راه دور؛ فرآیند انتقال برابر خطوط انتقال؛ خط انتقال بلند؛ فیلتر پایین گذر؛ روش انتقال مجازی
کلمات کلیدی انگلیسی
Coupling capacitor voltage transformer; Distance protection; Equal Transfer Process of Transmission Lines; Long transmission line; Low-pass filter; Virtual transfer method
پیش نمایش مقاله
پیش نمایش مقاله  رله فاصله سریع جدید برای خطوط انتقال طولانی

چکیده انگلیسی

The measuring accuracy and the measurement stability of conventional distance relay will be influenced by complex and remarkable harmonic components due to the large capacitance of the line when it is used for a long line. Correspondingly, the tripping speed will be delayed to some extent. To solve this problem, a fast distance relay for long transmission lines is presented, which is on the basis of the differential equation algorithm using π transmission line model and the theory of Equal Transfer Process of Transmission Lines (ETPTL). The shortcomings of π model differential equation algorithm due to the impact of high frequency components can be overcome by using a low-pass filter. The problem resulting from the difference between the transfer feature of the voltages used by the distance protection and that of the currents due to the transient characteristic of coupling capacitor voltage transformers (CCVT) can be solved by using virtual digital CCVT. Then, the new distance relay can trip quickly by re-structuring the voltage at the fault point and iterative calculations. A variety of ATP simulation tests show that the new relay has fast tripping speed and high reliability when applied to the long transmission lines.