Outline

  • I. Introduction
  • II. Proposed Formulation for Planning Protective Devices Settings
  • III. System and Simulation Setup
  • IV. Simulation Results
  • V. Influence of the Proposed Approach on the Operating Time of Docrs

رئوس مطالب

  • چکیده
  • کلیدواژه ها
  • I. مقدمه
  • II. فرمول بندی پیشنهادی برای برنامه ریزی تنظیمات دستگاه های حفاظتی
  • III. راه اندازی سیستم و شبیه سازی
  • IV. توصیف سیستم آزمون تحت مطالعه
  • V. نتایج شبیه سازی
  • VI. تاثیر رویکرد پیشنهادی بر زمان عملیات DOCR
  • VII. تاثیر محدودکننده های جریان خطا بر زمان عملیات DOCR
  • VIII. نتیجه گیری

Abstract

Introduction of distributed generation (DG) to the power system may lead to nonselective protection actions. For every future DG installation, the relay settings need to be modified to guarantee protection coordination that can lead to numerous changes in relay settings. This paper presents a novel approach to plan relay protection coordination considering future DG installations. Thus, this paper aims at proposing a method capable of optimally identifying one set of relay settings valid for all possible future DG planning scenarios. The proposed algorithm is formulated as a linear programming problem and the simplex algorithm is utilized to solve it. The proposed approach is tested on the distribution part of the modified meshed IEEE 14-bus system and the IEEE 13-bus radial test system. Comparative studies have been conducted to highlight the advantages of the proposed approach under various planning scenarios considering application of fault current limiters.

Keywords: - - -

Conclusions

This paper proposes an approach for planning the settings of protective relays considering distribution system planning with DG. The results show that as the DG penetration increases with time possible violation in protection coordination can occur requiring frequent changes in relay settings. The proposed method avoids this problem by incorporating constraints that can guarantee protection coordination for DG capacities up to the maximum planned value (and not just for the rated value). By utilizing the proposed method and optimally allocating a FCL, one set of relay settings can be planned that can guarantee protection coordination up to the planned DG capacity while minimizing the overall relay operating time.

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