کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
398468 1438722 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Short-circuit current calculation method for partial coupling transmission lines under different voltage levels
ترجمه فارسی عنوان
روش محاسبه جریان کنونی برای خطوط انتقال گاز جزئی در سطوح مختلف ولتاژ
کلمات کلیدی
اتصال جزئی امپدانس متقابل صفر، جدا کردن، شبکه های ترکیبی کامپوزیت محاسبه جریان کوتاه مدت
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر هوش مصنوعی
چکیده انگلیسی


• The mutual impedance of partial decouple transmission lines is completely decoupled.
• The zero sequence impedances are corrected corresponding to the sequence network.
• The sequence networks of single line fault are deducted.

In power system, there are partial coupling lines under different voltage level because of the development of power system. When faults occur on these lines, zero-sequence mutual impedances bring difficulty to short-circuit calculation. To solve the problem, a new method is proposed in this paper. First, the three phase components are transformed to independent positive-sequence, negative-sequence and coupling zero-sequence components. Then the coupling zero-sequence is decoupled using the idea of six-sequence component method, namely recirculating current method. Finally, the system impedances and impedance of the non-coupling part are modified by comparing the relationship between sequence voltages and sequence currents of the newly defined decoupling method and symmetrical component method. According to the boundary condition, the composite sequence networks are obtained and the short-circuit current can be calculated easily. The PSCAD simulation result of short circuit analysis and calculation indicate that the proposed decoupling method for partial coupling line is appropriate. The short circuit calculation based on the decoupling method is easy to implement. The calculation method is practical and the calculation accuracy is not affected by fault type, different voltage grade and fault resistance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Electrical Power & Energy Systems - Volume 78, June 2016, Pages 647–654
نویسندگان
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