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Register a new userApplication of Fuzzy Logic Controller for Unified Power Flow Controller
استخدام طريقة المنطقة الموثوقة لتحسين موثوقية المعلومات المستخدمة للتحكم المؤتمت بنظم القدرة الكهربائية
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يعد جهاز متحكم سريان الاستطاعة الموحدة Unified Power Flow Controller (UPFC) أحد أهم أجهزة نقل التيار المتناوب المرنة (FACTS) Flexible AC Transmission Systems استخداماً في التحكم بسريان الاستطاعة وتحسين استقرار نظام القدرة. وللحصول على الفوائد المذكورة لهذا الجهاز يجب تصميم نظام تحكم ملائم للتحكم به. يقترح بحثنا تصميم نظام تحكم يعتمد على نظرية التحكم العشوائي (Fuzzy Logic) للتحكم بجهاز الـ UPFC. يستخدم نظام التحكم المقترح للتحكم والتنسيق بين إشارتي مطال جهد وزاوية طور قالبة منبع الجهد التي تمثل جهاز الـ UPFC، حيث تستخدم هاتان الإشارتان للتحكم بسريان الاستطاعة الفعلية والردية في خط النقل. وللتحقق من صلاحية وفعالية نظام التحكم المقترح وفعاليته، تمت نمذجة نظام قدرة مزدوج الخط موصول بشبكة لا نهائية الاستطاعة مزودة بجهاز UPFC باستخدام برنامج النمذجة والمحاكاة (PSCAD/EMTDC). ثم تمت محاكاة سلوك هذا الجهاز مع نظام التحكم المقترح في حالة حدوث عطل ثلاثي الطور مع الأرض. وقد أظهرت نتائج النمذجة والمحاكاة التي حصلنا عليها فعالية جهاز الـ UPFC مع نظام التحكم المتقرح في تحسين استقرار نظام القدرة الكهربائية عند حدوث العطل ثلاثي الطور مع الأرض. كما أظهرت هذه النتائج قوة هذا النوع من التحكم ومتانته وتفوقه مقارنة بالمتحكم التقليدي (PI)، بالإضافة إلى أنه يضمن استقرار الحلقة المغلفة لنظام التحكم من خلال سلوك متابعة جيد.
Unified Power Flow Controller (UPFC) is one of the most effective Flexible AC Transmission Systems (FACTS) devices for controlling power flow and improving stability of power system. To achieve the functionality of UPFC, a proper and sufficient control system should be designed for this device. Our research proposes a Fuzzy Logic control approach to control UPFC. The proposed control scheme is used to control and coordinate voltage and phase angle signals of Voltage Source Converters (VSCs) of UPFC, where these two signals are used to control active and reactive power flow in transmission line. To validate the proposed control scheme, a single-machine double line infinite bus power system equipped with UPFC is modeled using PSCAD/EMTDC software package. Three phase fault with ground case is simulated and investigated under the proposed controller. The modeling and simulation results show the effectiveness of the UPFC under the proposed control scheme for improving power system stability under the three phase fault case. The results also show the robustness and superiority of the proposed controller compared to conventional PI controller as well as it guarantees the closed-loop stability system and has a good tracking behavior.
References used
.HINGORANI, N. G.; GYUGYI, L. Understanding FACTS – Concepts and Technology of Flexible AC Transmission Systems, IEEE Press, 2000, pp432.
.ENRIQUE, C. R.; FUERTE-ESQUIVEL, H.; PEREZ, A. CAMACHO, C. A. FACTS Modeling and Simulation in Power Network, John Wiley &Sons, LTD. 2004, pp420
.IEEE PES Working Group, FACTS Applications, New York: IEEE Press, 1996
SONG, Y. H.; JOHNS, A. T. Flexible AC Transmission System (FACTS), IEE Power and Energy Series 30, 1999,pp592
GYUGYI, L. A Unified Power Flow Control Concept for Flexible AC Transmission Systems, IEE Proc.-C, 1992, pp. 323-331
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يهدف هذا المشروع إلى تطوير الجزء الخاص بالتحكم العرضي للعربة الذي يهتم
بمنع العربة من الخروج عن المسار عند المنعطفات و سيتم ذلك من خلال بناء
متحكم يعتمد في بنيته على نظرية الشبكات العصبونية العائمة التي تدمج ما بين
التحكم العائم و الشبكات العصبوني
ة، و ستكون مهمته بشكل اساسي تعديل حركة
المقود بحيث تتوافق مع المنعطفات على الطريق الذي تجتازه العربة.
This paper presents the proposed Method for designing fuzzy
supervisory controller model for Proportional Integral Differential
controller (PID) by Fuzzy Reasoning Petri Net (FRPN),the Features
of Method shows the fuzzification value for each prop
erty of
membership function for each input of fuzzy supervisory controller,
and determine the total number of rules required in designing the
controller before enter the appropriate rules in the design phase of
the rules, and determine the value of the inputs of the rule that has
been activated, and assembly variables that have the same property
and show the value for each of them programmatically, and
determine the deffuzification value using deffuzification methods.
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