The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
An intelligent control stand-alone doubly-fed induction generator (DFIG) system using proportional-integral-derivative neural network (PIDNN) is proposed in this study. This system can be applied as a stand-alone power supply system or as the emergency power system when the electricity grid fails for all sub-synchronous, synchronous and super-synchronous conditions. The rotor side converter is controlled...
Bit-Stream based control, which uses one bit wide signals to control power electronics applications, is a new approach for controller design. A Bit-Stream based control system for the Rotor Side Converter (RSC) of a Doubly Fed Induction Generator (DFIG) is proposed to demonstrate that the Bit-Stream control technique is suitable for complex vector control tasks. A new stator flux estimator and reference...
This paper presents an analysis and control design of a permanent magnet synchronous generation (PMSG)-based wind generation system operating under unbalanced network conditions. A proportional-resonant current controller using stationary-frame is applied for current control of the system to achieve the control target of eliminating the negative sequence current input into the grid supply network...
Recent advancement in size and technology of wind energy conversion systems (WECSs) require sophisticated control systems to effectively optimize energy conversion and enhance grid integration. Doubly-fed induction generators (DFIG)-based WECS are the most promising and widely utilized technology. This study focuses on advanced controls development to identify and assess the critical loads and instabilities,...
In low-power electronics, achieving a high energy efficiency has great relevance. Nowadays, global asynchronous local synchronous systems enables to use a local dynamic voltage scaling architecture. This technique allows to reach a high energy efficiency. Moreover, local dynamic voltage scaling can be implemented using different approaches. One of them is the Vdd-hopping technique. In this paper,...
The paper presents a digital simulation and validation study of a novel control system for control of a wave energy converter (WEC)-battery renewable energy system for DC type loads. The performance and dynamic characteristics of the controllers to any load nonlinear J, B parameters and load torque is examined for PMDC motor drives. The proposed dynamic error driven control system is digitally simulated...
The scheme of the developed Switched Reluctance linear generator system is presented, which is made up of the three-phase 6/4 structure simple side Switched Reluctance linear generator and the three-phase asymmetric bridge power converter. The structure of the Switched Reluctance linear generator is described with the side elevation and the sectional drawing. The three-phase asymmetric bridge power...
Model predictive control with a finite control set has emerged as a promising control tool for power converters and drives. One of the major advantages is the possibility to control several system variables with a single control law, by including them with appropriate weighting factors. However, at the present state of the art, these coefficients are determined empirically. There is no analytical...
The paper presents a method of emulating electrical loads using power electronic converters. The loads include machines such as induction motors and their associated mechanical load and also more complex machine systems such as wind driven generators. The load emulator is effectively a dynamically controllable source or sink which is capable of bidirectional power exchange with either a grid or another...
The strongly nonlinear magnetic characteristic of switched reluctance motors (SRMs) makes their torque control a challenging task. In contrast to standard current-based control schemes, we use model predictive control (MPC) and directly manipulate the switches of the dc-link power converter. At each sampling time a constrained finite-time optimal control problem based on a discrete-time nonlinear...
The peak-current control that is modeled in this paper is a novel variable-frequency control that maintains regulation in a flyback converter by enabling and disabling cycles instead of modulating the pulse-width, which allows for elimination of feedback compensation and can provide for peak power 3 times higher than the rated full load power without increasing the power supply component sizes. A...
This paper reviews the control methods that are used to regulate the output voltage of PWM inverters. Based on their structure, the controllers can be categorised under model-based controllers, non-model based and mixed-mode based controllers. The fundamental concepts of these controllers are described along with examples from each category. Furthermore limitations in terms of practical implementation...
PID controller has the problems of inferior dynamic quality and bad anti-interference ability. However, variable structure controller has the disadvantages of chattering and big steady-state error. A new controller combines variable structure and PID control method for brushless DC motor (BLDCM) of magnetic suspended reaction flywheel (MSRW) is designed. It is based on analyzing of the MSRW system...
A novel analog zero voltage switching (ZVS) closed-loop controller for bi-directional high frequency galvanic isolated DC-DC converters in high performance power supply applications, has been proposed in this paper. The DC-DC bi-directional power flow scheme is based on comparing the closed-loop power demand with a reference power with the intention of generating phase shifting (power) angle between...
The paper presents a method of emulating electrical loads using power electronic converters. The loads include machines such as induction motors and its associated mechanical load and also more complex machine systems such as wind power generation systems. The load emulator is effectively a dynamically controllable source or sink which is capable of bidirectional power exchange with either a grid...
With increasing population of elder people around the world, the demand of home care system such as sufficient sunlight supplier from natural resource is getting much attention in recent years. This paper has proposed a microprocessor (8051) based automatic shutter action control system using 4-speed controlled DC motor. The proposed system can keep sunlight moderate as desired in the indoor room...
In this paper, several different control methods based on intelligent system on DC-DC converter are compared with together. These DC-DC converters are used for the stabilization or the control of DC voltage of a battery. Lately, improvement the performance of the step-down converter is one of the goals of the engineers in the industries. In this paper controlled step-down converter using new several...
This work presents the implementation of a conventional PID and a fuzzy PI control schemes in a 16 bits microcontroller. These schemes are designed for the speed control of a DC brush motor. This article makes emphasis in the handling of the floating point for the first case. For the fuzzy control, the data is obtained directly from the digital analogical converter of the system.
The article is discussion with authors of [Shi Y. et al., 2005], who have presented proposal of multilevel matrix converter scheme. Because the authors have shown results of research involved only with one phase output multilevel matrix converter and suggested application one of known modulation methods to control of three phase scheme, this paper undertakes this problem. New elements of power scheme...
Switched reluctance motor (SRM) is a new type of speed adjustment motor. The control system of 8/6 pole switched reluctance motor is designed based on ARMS3C2410 central processor in this paper. The self-adjusting PID arithmetic control strategy is adopted in this system, the method of fixed angle current chopping control on low-speed and varying angle voltage chopping control on high-speed is used...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.