شناسايي تخليه جزيي در كابلهاي قدرت با استفاده از تبديل ويولت
الموضوعات :
بابک بدرزاده
1
(دانشگاه RGU انگلستان)
سيدمحمد شهرتاش
2
(دانشگاه علم و صنعت ایران)
الکلمات المفتاحية: تبديل ویولتپردازش سيگنال ديجيتالشناسايي پيوسته تخليه جزييكابل,
ملخص المقالة :
در اين مقاله به شناسايي پيوسته پديده تخليه جزيي در كابلهاي قدرت پرداخته شده است. مشكل اساسي در اندازهگيري تخليه جزيي كوچك بودن سيگنال است، بطوريكه ممكن است سيگنال كاملاً با نويز آميخته شده و اين امكان شناسايي را دشوار ميسازد. به همين جهت اساسيترين اقدام در شناسايي سيگنال تخليه جزيي استفاده از الگوريتمهاي كاهش نويز است كه امروزه به اين منظور غالباً از روشهاي مبتني بر پردازش سيگنال ديجيتال استفاده ميشود. در اين مقاله از الگوريتم نويززدايي مبتني بر ویولت استفاده شده و در انتها نتايج حاصل از بكارگيري اين الگوريتم با دو الگوريتم متداول ديگر (فيلتر پيشبين خطي و فيلترLMS) مقايسه شده است. برخي از ملاحظات اساسي در نويززدايي به روش ویولت انتخاب مناسب سطوح تجزيه و تركيب، تابع مادر، روش بسط سيگنال و روشهاي تعيين مقادير آستانه است كه همگي به تفصيل مورد بحث قرار گرفتهاند. به جهت اثبات كارايي الگوريتم از اطلاعات واقعي بدست آمده از آزمايشهاي ميداني در يك شبكه كابلي 11 كيلو ولتي استفاده شده است .
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[25 ] بابك بدرزاده، شناسايي و مكان يابي تخليه جزيي در كابلهاي قدرت با استفاده از فيلترهاي وفقي و تبديل ويولت، پايا ن نامه كارشناسي ارشد مهندسي قدرت،. دانشكده مهندسي برق، دانشگاه علم و صنعت ايران، ارديبهشت 1381.
