نتایج جستجو برای: AVR system

تعداد نتایج: 2232892  

Journal: :international journal of smart electrical engineering 2014
seyyed amir hashemi zadeh1 mostafa zamani mohi abadi

designing of a pid controller is a very common method for industrial process control and due to its very simple and efficient function; it is used in a wide variety of industrial applications. pid controller to reduce the steady state error and dynamic response of the system is used. pid controller design is an inevitable problem in setting the coefficients need to try a lot of trial and error,...

Journal: :The Annals of thoracic surgery 2016
David Holzhey Friedrich W Mohr Thomas Walther Helge Möllmann Andreas Beckmann Joachim Kötting Hans Reiner Figulla Jochen Cremer Karl-Heinz Kuck Rüdiger Lange Stefan Sack Gerhard Schuler Friedhelm Beyersdorf Michael Böhm Gerd Heusch Thomas Meinertz Till Neumann Konstantinos Papoutsis Steffen Schneider Armin Welz Christian W Hamm

BACKGROUND Conventional aortic valve replacement (AVR) remains the therapy of choice for many patients with severe aortic valve disease. The unique German Aortic Valve Registry (GARY) allows the comparison of contemporary outcomes of AVR with those of transcatheter AVRs. We report here real-world, all-comers outcomes of AVR, including combined AVR and coronary bypass grafting (AVR+CABG). METH...

2012
A. Alsaedi

Adaptive PID controller based on real base function (RBF) network identification by optimal tuning of proportional– integral–derivative (PID) controller parameter is necessary for thematic factory operation of an automatic voltage regulator (AVR) system. This study presents a combined genetic algorithm (GA) and real base function network (RBF) identification control approach to determine the op...

2010
G. SHABIB A. G. MOSLEM A. M. RASHWAN

This paper present a new method to determine the optimal tuning of the PID controller parameter of an AVR system using Modified particle swarm optimization (MPSO) algorithm. the AVR is not robust to variations of the power system parameters therefore, it is necessary to use PID controller To increase the stability and performance of the AVR system. Fast tuning of optimum PID controller paramete...

2015
Yukio Umeda Yasunari Yokota Yoshio Mori Yoko Kawamura Hiroshi Takiya

Method Twenty patients with AS without aortic insufficiency underwent AVR using bioprostheses were recruited. Preand post-AVR cardiac function parameters and aortic valve parameters were collected by transthoracic echocardiography. To evaluate the influences of peripheral vascular resistance on transvalvular flow velocity, static distensibility parameters of the carotid artery, such as b stiffn...

2011
O. Abedinia H. A. Shayanfar

This paper presents the robust design of a Power System Stabilizer (PSS) to improve the stability in the composed two-area Load Frequency Control (LFC) and Automatic Voltage Regulator (AVR) using Artificial Bee Colony (ABC) in a restructured environment. The coupling effects of the LFC and AVR loops are studied by extending the linearized Automatic Generation Control (AGC) system to include the...

In this paper, a high-performance optimal fractional emotional intelligent controller for an Automatic Voltage Regulator (AVR) in power system using Cuckoo optimization algorithm (COA) is proposed. AVR is the main controller within the excitation system that preserves the terminal voltage of a synchronous generator at a specified level. The proposed control strategy is based on brain emotional ...

2015
Seung-Mook Baek

The paper describes an optimal parameter selection method of automatic voltage regulator (AVR) for a large power plant in order to improve power system stability. The AVR is generally used to control the output voltage of the generator by regulating the excitation voltage in a generator rotor. In order to improve transient stability in power system, the paper proposes the method to select optim...

Journal: :IJEOE 2015
Rahmat Khezri Hassan Bevrani

This paper presents performance of intelligent fuzzy-based coordinated control for Automatic Voltage Regulator (AVR) and Power System Stabilizer (PSS), to prevent losing synchronism after major sudden faults and to achieve appropriate post-fault voltage level in multi-machine power systems. The AVR and PSS gains can adaptively change to guarantee the power system stability after faults. For cha...

2014
Omar Bendjeghaba

This paper presents a tuning approach based on Continuous firefly algorithm (CFA) to obtain the proportional-integralderivative (PID) controller parameters in Automatic Voltage Regulator system (AVR). In the tuning processes the CFA is iterated to reach the optimal or the near optimal of PID controller parameters when the main goal is to improve the AVR step response characteristics. Conducted ...

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