ساختار جدید مزرعه بادی– خورشیدی با قابلیت بهبود عملکرد در شرایط افت ولتاژ و فرکانس شبکه
الموضوعات :مهرداد طرفدارحق 1 , فرشید نجاتی مازگر 2 , سجاد توحیدی 3
1 - دانشگاه تبریز
2 - دانشگاه تبریز
3 - دانشگاه تبریز
الکلمات المفتاحية: توربین بادیپانل خورشیدیDFIGخطای ولتاژخطای فرکانس و منبع ذخیره ساز انرژی,
ملخص المقالة :
در این مقاله ساختار جدیدی برای مزرعه بادی- خورشیدی ارائه شده است. مزرعه بادی- خورشیدی پیشنهادی دارای قابلیت اتصال پانل خورشیدی و بارهای DC بوده و مجهز به یک سیستم ذخیره انرژی (ESS) میباشد. هر توربین بادی DFIG در مزرعه بادی پیشنهادی دارای یک اتصال به شبکه AC از طریق استاتور و یک اتصال به لینک DC مشترک از طریق مبدل سمت روتور میباشد. در ساختار پیشنهادی، برای تبادل توان بین لینک DC مشترک و شبکه AC از یک مبدل سمت شبکه با توان بالا استفاده شده است. مزرعه بادی پیشنهادی در شرایط عملکرد عادی از مزایایی همچون کاهش تلفات مبدل و افزایش طول عمر مبدلها بهره میبرد. همچنین ساختار پیشنهادی قادر است قوانین شبکه را در تزریق توان راکتیو و توان اکتیو به ترتیب متناسب با خطاهای ولتاژ و فرکانس با استفاده از سیستم کروبار موازی و منبع ذخیرهساز انرژی و با تغییر حالت کنترلی DFIGها و پانلهای خورشیدی رعایت کند. جهت بررسی قابلیتهای ساختار پیشنهادی، شبیهسازی سیستم با نرمافزار MATLAB/Simulink انجام گردیده و همچنین از یک سیستم آزمایشگاهی جهت بررسی عملکرد ساختار پیشنهادی در شرایط مختلف کاری استفاده شده است.
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