روشي جدید براي بارزدايي ولتاژي با در نظر گرفتن حساسيت ولتاژ و توان راکتيو بارها
محورهای موضوعی : مهندسی برق و کامپیوترجواد مدرسی 1 , مهدی قلی‌پور 2 * , امین خدابخشیان 3
1 - دانشگاه اصفهان
2 - دانشگاه اصفهان
3 - مهندسی
کلید واژه: بارزدايي ولتاژي باس مؤثر توان راکتيو حساسيت ولتاژ پایداری ولتاژ,
چکیده مقاله :
بارزدایی، آخرین واکنش برای کنترل و پایداری سیستم قدرت در هنگام وقوع اغتشاش است. تعیین محل و مقدار بارزدایی از مسایلی است که همواره گریبان‌گیر بهره‌برداران سیستم قدرت بوده است. در اين مقاله روش جدیدی براي تعیین باس مناسب جهت انجام بارزدایی ولتاژی پیشنهاد می‌شود. در روش پيشنهادشده بر خلاف روش‌های پيشين از دو شاخص حساسيت ولتاژ نسبت به توان اکتيو و توان راکتيو بارها استفاده می‌شود تا باس مناسب جهت بارزدایی ولتاژي مشخص شود. در نظر گرفتن توان راکتیو بارها در فرایند تعیین باس مناسب برای بارزدایی ولتاژی باعث قطع توان راکتیو بیشتر در پله‌هاي ابتدايي بارزدايي ولتاژی شده و پروفيل ولتاژ بهبود می‌یابد. در نتیجه، توان اکتیو کمتری توسط بارزدایی ولتاژی قطع می‌شود. روش پيشنهادي به همراه روش مبتني بر حساسيت ولتاژ نسبت به توان اکتيو در شبکه تست 118باسه IEEE و شبکه 39باسه New England پياده‌سازي مي‌شوند تا درستی روش پیشنهادشده مورد بررسی قرار گیرد. نتایج حاصل نشان‌دهنده برتری روش پیشنهادی نسبت به روش حساسیت ولتاژ نسبت به توان اکتیو است.
Load shedding is the last line of defense for controlling and stabilizing of the power system in the occurrence of a disturbance. Determining the amount and location of the load shedding are issues that the power system operators always have faced In this paper, a new method is proposed for determining the location of under voltage load shedding (UVLS). The proposed method, unlike the previous UVLS methods, uses two different factors to determine the effective location of UVLS. Considering the load reactive power in the process of determination of the UVLS location leads to disconnecting more reactive power during the initial steps of UVLS. Therefore, less active power sheds by the UVLS. To verify the accuracy of the proposed method, the proposed UVLS method accompanied with the method which uses the sensitivity of voltage with respect to the active power are implemented in IEEE 118-bus test system and New England 39 bus system. The obtained results show the superiority of the proposed method.
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