: به طور کلی اساس عملکرد اغلب محدودکننده های جریان خطا کاهش جریان اتصال کوتاه به وسیله واردکردن یک امپدانس بزرگ در مدار در زمان وقوع خطا است. محدودکننده های جریان خطا در مورد نوع امپدانس و چگونگی وارد شدن و خارج شدن امپدانس به سیستم با هم متفاوت هستند. دراین مقاله با در نظر گرفتن سه مکان مختلف جهت نصب محدودکننده جریان خطا در یک شبکه قدرت نمونه و همچنین تغییر نوع (سلفی یا مقاومتی) و مقدار امپدانس آن در یک بازه بزرگ، اثرات این پارامترها بر پایداری سیستم قدرت مورد بررسی و تحلیل قرار گرفته است. معیاری که برای اولین بار در این مقاله توسط نویسندگان جهت بررسی و ارزیابی پایداری گذرای سیستم قدرت مورد استفاده قرار گرفته است، روش اختلاف بین سطح شتاب دهنده و شتاب گیرنده است. اساس این روش بر مبنای معیار سطوح برابر است. موارد دیگری که در این مقاله به آن پرداخته شده است یکی ارایه روشی جهت مکان یابی و تعیین مقدار بهینه امپدانس محدودکننده جریان خطا جهت بهبود پایداری سیستم قدرت است. همچنین، اثر زمان رفع خطا بر پایداری گذرا، هنگام حضور محدودکننده جریان خطا در شبکه قدرت، مورد مطالعه قرار گرفته است. پرونده مقاله

In this paper, a method to compute optimum impedance of fault current limiter (FCL) is presented. The type of FCL impedance based on its resistance, inductance and capacitance has an effect on the amount of short circuit current reduction. Therefore, for an optimum result a complex parameter is selected for the FCL impedance. In addition, magnitude of short circuit current is also affected by location of FCL and the amount of system parameter. Due to the cost difference of real and imaginary components of FCL impedance, this calculation is based of sensitivity analysis, such that while minimizing the cost of impedance parts for FCL, reduction in fault current is maximized. Moreover, based on the maximum allowable current constraint and using a developed computer program, an optimum FCL impedance for a wide range of prices for real and imaginary components are computed. These analyses were applied on a 11 bus test system with using a specified single location of FCL. پرونده مقاله

Due to expansion of power network, the short circuit current of power system are increased. Fault current limiters (FCL) are responsible to reduce and limit the fault currents. In addition, these components can also improve the stability of system. In this paper the effect of type and amount of FCL impedance on angle stability power system is investigated. Furthermore, the indices of rotor mechanical angle generator, when it reaches the steady state, after oscillations due to the fault occurrence for two types of FCL impedance (resistant and inductance) are being studied. Based on these indices, the amount of optimum FCL impedance for both resistant and inductance FCL are simulated and calculated on a tested network using a developed computer program. پرونده مقاله

Considering the outstanding use of renewable energy sources, most of industrial countries secure a main part of their required energy from renewable energy resources. Solar panels and wind turbines are the most important sources for the scattered production based on Renewable energies. In this study the optimized design of a solar panel, wind turbine hybrid system with superconductive magnetic energy storage (SMES), separated from network, to provide for the load demand of a military site is considered. The aim of a system optimization is specifying the number of solar panels, wind turbines, and SMESs with minimizing the cost of system's energy production. In hybrid systems, due to fluctuations in energy production of solar panels and wind turbines, accumulation systems are used in order to provide for a perpetual load. This system is also used to minimize annual costs of energy production for a system of load demand of a military site with the use of TLBO algorithm on a basis of teach-learn is being studied. پرونده مقاله

In this paper, two protective devices, recloser and cutout fuse, are placed simultaneously. Indeed, main contribution of this research is considering Distribution Generation (DG) placement in this problem. The multi objective function has been formulated based on minimizing power loss and maximizing reliability. Selection of reliability indices has been performed based on a compromise between customer satisfaction and seller. This problem is solved by Particle Swarm Optimization (PSO) algorithm and tested on the part of practical distribution system. The reliability indices are System Average Interruption Duration Index (SAIFI), Cost of Energy Not Supplied (CENS), System Average Interruption Frequency Index (SAIFI) and Momentary Average Interruption Frequency Index (MAIFI). Simulation has been performed in part of practical distribution system by introduced several scenarios and cases. پرونده مقاله

Distributed generation resources are used to upgrade older power systems to more efficient systems. Although distributed generation resources have numerous benefits, they can cause protection problems due to multiple configurations. Fault current limiters (FCLs) are used to reduce short circuit current in the network. A change in short-circuit current can cause a change in the protection system settings. In this paper, using the genetic algorithm, the optimal size and location of distributed generation in the power network with the presence of FCL and without it according to the protection settings of the system have been studied. The results of this study were performed on the 33-bus IEEE network. پرونده مقاله

The objective of this study is to strategize the allocation of resources within the distribution microgrid. The primary goals are to diminish active power loss and voltage discrepancies, enhance resilience, decrease the expense of procuring energy from the main network, augment the incorporation of distributed renewable energy sources, and optimize the profitability of integrating distributed generation and storage resources into the power supply. In this article, the microgrid design challenge is approached through the focus on a nonlinear optimization model. The Biogeography-based optimization algorithm is employed to tackle this complex problem. Moreover, the planning solution is crafted to address uncertainties, incorporating factors such as wind speed, solar radiation, and consumption load variability within the distribution network. To validate the efficacy of the proposed methodology, the standard 33-bus test system is scrutinized. The outcomes underscore the remarkable efficiency of the proposed solution, showcasing its potential for practical applications in optimizing microgrid performance. پرونده مقاله