ساختار انتقال داده کاهشیافته در کنترل ثانویه توزیعشده یک ریزشبکه با استفاده از تبادل داده نامنظم
محورهای موضوعی : مهندسی برق و کامپیوترمحی الدین گنجیان ابوخیلی 1 , مجید شهابی 2 * , قباد شفیعی 3
1 - دانشگاه صنعتی نوشیروانی بابل
2 - دانشگاه صنعتی نوشیروانی بابل-دانشکده مهندسی برق و کامپیوتر
3 - دانشگاه کردستان
کلید واژه: الگوریتم اجماعیانتقال داده نامنظمريزشبکهکنترل ثانویه توزیعشده,
چکیده مقاله :
استفاده از مشخصه شیب افتی در سطح کنترل اولیه جهت کنترل منابع موجود در ریزشبکه، همواره با یک خطای ماندگار در ولتاژ و فرکانس و عدم تسهیم مناسب توان راکتیو همراه میباشد. به کارگیری کنترل ثانویه میتواند تا حد مطلوبی این عیوب را جبران نماید. کنترل ثانویه به روش توزیعشده در مقابل روش متمرکز، مزیتهای مختلفی مانند افزایش قابلیت اطمینان، انعطافپذیری و توسعهپذیری را به ارمغان میآورد. پیادهسازی کنترل ثانویه توزیعشده معمولاً مبتنی بر الگوریتم اجماعی است که شبکه مخابراتی نقش بسیار مهمی در آن ایفا میکند. شبکه مخابراتی معمولاً به صورت پیوسته و با نرخ ثابت تبادل داده مدل شده است. در این مقاله با توجه به ماهیت گسسته شبکه مخابراتی، مدل گسسته الگوریتم اجماعی و شبکه مخابراتی آن در نظر گرفته شده است. همچنین به منظور کاهش میزان تبادل داده و آزادسازی ترافیک شبکه مخابراتی، دو نوع انتقال داده نامنظم وابسته به شرایط و مستقل از شرایط پیشنهاد شده است. در این روش فواصل زمانی بین انتقال دادهها یکسان نمیباشد. همچنین تأخیر زمانی در انتقال داده به عنوان یک اثر نامطلوب مورد بررسی قرار گرفته است. روش پیشنهادی بر روی یک ریزشبکه جزیرهای اعمال شده و نتایج حاصل از شبیهسازی عملکرد مطلوب این روش را به خوبی نشان میدهد.
The steady state error in voltage amplitude and frequency and improper reactive power sharing are main disadvantages of droop control in primary level of control of distributed resources (DERs) in microgrid. Secondary control can compensate these problems. In contrary to centralize control, distributed secondary control may bring merits such as reliability, flexibility and scalability improvement. The distributed secondary control is usually implemented using consensus algorithm whose communication network is very important. Communication network is usually modeled continuously with a constant transfer rate. In this paper, the consensus algorithm with communication network are implemented in discrete domain because of discrete nature of them. Two aperiodic data transfer strategies state dependent and state independent are also proposed for releasing communication network burden where data rate is not fixed. Time delay as a non-desirable effect is evaluated. The proposed method applied on an islanded microgrid, and simulation results show the effectiveness of the proposed method.
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