پخش بار بهينه در شبکه توزيع هوشمند مبتني بر قطع بهينه بار و بهبود شاخص پايداري ولتاژ
محورهای موضوعی : مهندسی برق و کامپیوتر
سهیل درفشی بیگوند
1
(دانشگاه رازی)
حمدی عبدی
2
(دانشگاه رازي)
کلید واژه: پخش بار بهينه شاخص پايداري ولتاژ شبکه هوشمند قطع بار کنترل مستقيم بار ناپايداري ولتاژ,
چکیده مقاله :
شبکه هوشمند حاصل فعال‌شدن مصرف‌کنندگان در سيستم قدرت و ايفاي نقش آنها در زمينه برنامه‌ريزي و بهره‌برداري سيستم قدرت است. زيرساخت‌هاي ارتباطي، کنترلي و اندازه‌گيري به عنوان پل ارتباطي هوشمند، ارتباط دوسويه‌اي را بين مصرف‌کنندگان و شبکه قدرت برقرار نموده و زمينه را براي اجراي مؤثر برنامه‌هاي پاسخ‌گويي بار همانند کنترل مستقيم بار فراهم مي‌کنند. در اين مقاله پخش بار بهينه به عنوان يک مبحث مطالعاتي مهم در سيستمهاي قدرت مبتني بر کنترل مستقيم بار و يک شاخص پايداري ولتاژ جديد ارائه شده است. سادگي انجام محاسبات، وابستگي به ولتاژ، عدم وابستگي مستقيم به بار و همبندي شبکه و نيز عدم نياز به کاهش شبکه به فرم دو شين معادل، شاخص پايداري ولتاژ پيشنهادي را براي محاسبات بي‌درنگ با وجود تغيير الگوي بار مناسب ساخته است. در روش ارائه‌شده، قطع بهينه بار در تعدادي از بارهاي انتخابي شبکه با هدف بهبود شاخص پايداري ولتاژ ضعيف‌ترين شين سيستم مورد بررسي قرار گرفته است. روش پيشنهادي روي يک شبکه توزيع شعاعي 69شينه به عنوان يک شبکه هوشمند جهت تشخيص مؤثربودن آن اعمال شده است.
Smart grid is the result of enabling consumers in the power system in order to play an effective role in the power system planning and operation processes. The communication, control, and measurement infrastructures create a two-way intelligent communication between users and the network which facilitates the effective implementation of demand response programs (DRPs) such as the direct load control (DLC). In this paper, optimal power flow as an important research topic in the power systems is presented based on DLC and a new voltage stability index. Simple calculations, voltage dependence, indirect dependence to the load and network topology, and also not reducing the network into a two-bus equivalent model, have made the proposed voltage stability index more applicable to real-time calculations considering the load pattern changes. In the proposed method, the optimal load curtailment in some selected loads of the network, with the aim of improving the voltage stability index of the weakest bus is evaluated. Finally, in order to show the effectiveness of the suggested method, it is applied to a 69-bus radial distribution network as an intelligent system.
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