شبيه‌سازي ديناميکي فليکر ناشي از کوره‌هاي قوس الکتريکي
محورهای موضوعی : مهندسی برق و کامپیوترساناز مسچی 1 , مسعود علي‌اکبر گلکار 2 , احسان هاشم‌زاده 3
1 - شرکت مدیریت شبکه برق ایران
2 - دانشگاه صنعتی خواجه نصیرالدین طوسی
3 - دانشگاه فردوسی مشهد
کلید واژه: شبیه‌سازیفليکرکوره قوس الکتريکيهارمونيک,
چکیده مقاله :
فليکر ولتاژ و هارمونيک‌ها مشکلات کيفيت توان هستند که توسط کوره‌هاي قوس الکتريکي به سيستم قدرت تحميل مي‌شوند. براي مطالعه دقيق کوره‌ها و پيداکردن راه حل مقابله با اثرات منفي آنها احتياج به يک مدل مناسب از رفتار ديناميکي کوره‌ها داريم. در اين مقاله ابتدا به بررسي مدل‌هاي مختلف کوره‌هاي قوس الکتريکي که به‌صورت جامع در اکثر مقالات آمده، پرداخته می‌شود. سپس با توسعه ديناميکي مدل‌ها و به‌دست آوردن مشخصه ديناميکي آنها فليکر ناشي از مدل‌هاي مختلف، تحت شرايط يکسان شبيه‌سازي و با مقايسه و تحليل نتايج، مدل مناسب و دقيق‌تر معرفي مي‌شود. در انتها روش جديدي براي مدل‌سازي فليکر توليدي کوره بر مبناي مدولاسيون طول قوس فعال در طي فرآيند ذوب پيشنهاد مي‌گردد.
Voltage flicker and harmonics are the power quality problems which are introduced to the power system as a result of behavior of the arc furnace operation. To analyze harmonic and flicker generated by an arc furnace, accurate arc furnace models are needed. In this paper, different arc furnace models with different level of complexity are reviewed. In the first part of this paper a new developed time domain static model based on a piece-wise linear approximation of the V-I characteristics of the arc furnace is presented. In the second part of the paper, dynamic model for an arc furnace using MATLAB (Simulink) is presented. In addition to this, the novelty of this simulation technique lies in the fact that the variation of power transmitted to the load by the arc furnace during the cycle of operation is considered, thus making the proposed model more accurate and dependent on the operating conditions of the load. Finally recommendations are made for the application of some of these models and the accuracy of the presented model to other models from the practical point of view by using MATLAB is shown.
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