نتایج جستجو برای: flexible AC transmission systems
تعداد نتایج: 1515984 فیلتر نتایج به سال:
Optimal Power Flow (OPF) has been widely used in power system operation and planning. This paper presents Differential Evolution (DE) method to solve optimal power flow in power system incorporating a powerful and versatile Flexible AC Transmission Systems (FACTS) device such as Unified Power Flow Controller (UPFC). Unlike other FACTS devices, UPFC has a great flexibility that can control the a...
This paper presents the application of neural networks for controlling the static synchronous compensator (StatCom) device. The primary duty of the StatCom is the regulation of the AC bus bar voltage where the device is connected. Additionally, a secondary task may be added to such device for obtaining a positive interaction with other controllers in order to mitigate low frequency oscillations...
گستردگی و پیچیدگی روزافزون شبکه های قدرت، احداث خطوط انتقال و افزایش تعداد نیروگاهها باعث افزایش سطح اتصال کوتاه در باس بارها می شوند. پس در صورت بروز اتصال کوتاه (که در هر سیستم قدرت امری اجتناب ناپذیر است) جریانها خطای قابل توجهی در سیستم جاری می شوند که اثرات سوء زیادی داشته و برای قطع آنها احتیاج به کلیدهای قدرت با توان بالایی داریم. برای کاهش قدرت قطع کلیدها از محدودساز جریان خطا استفاده م...
به دلیل ساختار انحصار محدود بازارهای برق و نیز به دلیل محدودیت های که از سوی شبکه انتقال به بازارتحمیل می شود. تولید کنندگان ممکن است توسط پیشنهاددهی راهبردی بالاتر از هزینه های حدی خود به بازار عمده فروشی، به اعمال نیروی بازار از شرایط رقابت کامل فاصله زیادی بگیرد، به طوری که قیمت های تسویه بازار نسبت به حالت رقابت کامل بالاتر برود و مازاد اضافی ناشی از رفتار نیروی بازار نصیب تولیدکنندگان بشود...
— The Unified Power Flow Controller (UPFC) is a typical FACTS (Flexible AC Transmission Systems) device that is the most sophisticated and complex power electronic equipment and has emerged for the control and optimization of power flow and also to regulate the voltage in electrical power transmission system. This project propose the real, reactive power and voltage control through a transmissi...
Flexible Alternating Current Transmission Systems (FACTS) devices have been used for several targets in power system, one of the main contributions of the devices is improving operation conditions. In this paper, two types of these devices have been placed to raise voltage profile, minimizing system loss and arising loadability. The suggested FACTS devices are: Unified Power Flow Controller (UP...
Flexible AC Transmission Systems (FACTs) play a vital role in minimizing the power losses and improving voltage profile transmission system. These increase real transfer capacity of However, optimal location sizing FACTs devices determines extent benefits provided by to Non-optimal solution terms may possibly lead under-compensation or over-compensation phenomena. Thus, robust optimization is p...
Power system engineers are currently facing challenges to increase the power transfer capabilities of existing transmission system. This is where the Flexible AC Transmission Systems (FACTS) technology comes into effect. With relatively low investment, compared to new transmission or generation facilities, the FACTS technology allows the industries to better utilize the existing transmission an...
In emerging electric power systems, increased transactions often lead to the situations where the system no longer remains in secure operating region. The flexible Ac transmission system (FACTS) controllers can play an important role in the power system security enhancement. However, due to high capital investment, it is necessary to locate these controllers optimally in the power system. FACTS...
Abstract: The need for more efficient power systems has prompted the use of a new technologies includes Flexible AC transmission system (FACTS) devices. FACTS devices provides new opportunity for controlling the line power flow and minimizing losses while maintaining the bus voltages within a permissible limit. In this thesis a new method is proposed for optimal placement and sizing of Thyristo...
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