کنترل ولتاژ و توان راکتیو در شبکه توزیع به صورت محلی و کنترل از راه دور در حضور ژنراتورهای القایی

نوع مقاله: پژوهشی

نویسندگان

دانشگاه شهید بهشتی- پردیس فنی شهید عباسپور

چکیده

کنترل ولتاژ و توان راکتیو در شبکه‌های توزیع جزو پایه‌ای‌ترین اقدامات بهره‌بردار شبکه توزیع است. این کار معمولا توسط کنترل محلی تپ‌چنجر قابل قطع زیر بار، خازن‌های پست و خازن‌های فیدر صورت می‌گیرد. امروزه استفاده از منابع تولید پراکنده (DG) در شبکه‌های توزیع این نحوه‌ی کنترل را دستخوش تغییر کرده است. در این مقاله ابتدا کنترل ولتاژ و توان راکتیو به صورت کنترل محلی بررسی شده و سپس چگونگی تاثیر حضور DG از نوع ژنراتور القایی بر این روش کنترلی ارزیابی می‌شود. در ادامه یک هماهنگی مناسب بین تپ‌چنجر قابل قطع زیر بار، خازن‌های پست و خازن‌های فیدر جهت کنترل مطلوب ولتاژ و توان راکتیو به صورت محلی ارائه می‌شود. نتایج نشان می‌دهد استفاده از کنترل محلی در حضور ژنراتور القایی بهینه نبوده و گاهی قیود بهره‌برداری نقض می‌شود. در نهایت سه روش برای کنترل ولتاژ و توان راکتیو در حضور ژنراتور القایی به منظور کاهش تلفات و رعایت قیود بهره‌برداری در طی شبانه‌روز پیشنهاد شده و نتایج ارائه می‌گردد. ژنراتور القایی در دو حالت توان ثابت و توان متغیر ارزیابی می‌شود. مطالعات شبیه‌سازی بر روی یک شبکه توزیع با 10 شین و ولتاژ 70/10kV صورت گرفته است.

کلیدواژه‌ها


عنوان مقاله [English]

Local and Remote Voltage and Reactive Power Control in the Presence of Induction Generators

نویسندگان [English]

  • Behnam Rezaei
  • Mohammad Taghi Ameli
چکیده [English]

Voltage and reactive power control in distribution networks is one of the most basic tasks of a distribution network operator. This is usually controlled by on-load tap-changer (OLTC), substation capacitors, and feeder capacitors. This paper first investigates a local voltage and reactive power control in a distribution system and then how the presence of induction machine based DG affects it. In the following a proper coordination among OLTC and capacitors to minimize losses in the distribution system, with and without DG, is formulated. The results showed that in the presence of induction generator, local control was not optimal, and sometimes operating constraints are violated. Finally three methods for controlling voltage and reactive power in the presence of induction generator to reduce losses and comply with the limitations operation during the day are proposed. Induction generator can be both fixed and variable be evaluated. Simulation studies on a distribution network of 10 bus with 70/10kV voltage has been made.

کلیدواژه‌ها [English]

  • Distributed generation
  • distribution system
  • feeder capacitor
  • Induction Machine
  • losses
  • on-load tap-changer
  • substation capacitor
  • voltage and reactive power control
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