ارائه یک الگوریتم جدید برای تعیین جهت خطا در خطوط انتقال مبتنی بر بهینه‌سازی حداقل مربعات
الموضوعات :
1 - دانشگاه ایلام
2 - دانشگاه ایلام
الکلمات المفتاحية: اشباع CT حفاظت دیجیتال رله جهتی مؤلفه توالی مثبت ناحیه مرده,
ملخص المقالة :
با توجه به کاربرد وسیع حفاظت جهتی در شبکه‌های فوق توزیع و انتقال، در این مقاله یک الگوریتم جدید برای تعیین جهت خطا در خطوط انتقال پیشنهاد شده است. این الگوریتم دارای ناحیه مرده نمی‌باشد و همچنین برای انواع خطاهای داخلی و خارجی و بدون توجه به محل خطا نیز به درستی عمل می‌کند. این عملکرد صحیح تحت شرایط خطاهای نزدیک رله نیز صادق است. الگوریتم در تشخیص خطا سریع عمل کرده و جهت درست خطا را در شرایط مختلفی از قبیل اشباع CT، نوسانات توان و وجود منابع قوی و ضعیف تشخیص می‌دهد. همچنین مقاومت خطا و زاویه شروع خطا نیز تأثیری در عملکرد صحیح الگوریتم ندارد. فرکانس نمونه‌برداری پایین الگوریتم پیشنهادی به آن قابلیت پیاده‌سازی صنعتی می‌دهد. جهت ارزیابی الگوریتم، شبیه‌سازی‌ها با استفاده از نرم‌افزار EMTP-RV انجام گرفته است. الگوریتم توسط داده‌های میدانی استخراج‌شده از پستkV 230 مانشت، واقع در استان ایلام نیز اعتبارسنجی شده است. نتایج نشان می‌دهد که الگوریتم پیشنهادی دارای سرعت و قابلیت اطمینان مناسبی می‌باشد.
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