ساختار جدید مزرعه بادی– خورشیدی با قابلیت بهبود عملکرد در شرایط افت ولتاژ و فرکانس شبکه
محورهای موضوعی : مهندسی برق و کامپیوترمهرداد طرفدارحق 1 * , فرشید نجاتی مازگر 2 , سجاد توحیدی 3
1 - دانشگاه تبریز
2 - دانشگاه تبریز
3 - دانشگاه تبریز
کلید واژه: توربین بادیپانل خورشیدیDFIGخطای ولتاژخطای فرکانس و منبع ذخیره ساز انرژی,
چکیده مقاله :
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.
In this paper a new structure for wind – PV farm is proposed. The PV arrays and DC loads are capable to connect to the proposed structure. In the proposed structure each DFIG wind turbine is connected to the AC grid through its stator windings and has a connection to a common DC link via its rotor side converters. The proposed structure uses a high power grid side converter and an energy storage system for entire wind – PV farm. The converter power loss decrease and lifetime increase of power switches are some advantages of the proposed structure under normal operation conditions. The proposed structure with the coordinated power control of DFIG wind turbines, the ESS and PV arrays improves the low voltage ride-through capability under-voltage fault conditions and enhances the frequency response of the wind farm under frequency faults. The proposed structure is simulated in MATLAB/ Simulink software and the results are presented. Furthermore, an experimental setup is provided to test the operation of the proposed structure.
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