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A robust and reliable wind power evacuation scheme through a Permanent-Magnet Synchronous Generator (PMSG) is proposed in this paper. In this topology, a generatorside passive bridge rectifier and a grid-side Buck Boost Inverter (BBI) is employed to facilitate an efficient and economical Wind Energy Conversion system. In BBI, the peak value of the alternating output voltage is independent on the direct...
This paper presents the design of a micro-grid with permanent magnet brushless DC (PMBLDC) generator based wind energy conversion system (WECS) and Solar PV along with stand-alone loads. The output of the PMBLDC is converted to a controlled DC bus voltage using a PWM rectifier through which independent real and reactive power control are achieved. This DC bus is common to both solar PV and WECS. A...
Global warming might be one of the driving forces to develop electrical drive trains due to the ability of being powered 100% renewable. However, cost reasons are still a driving issue. Referring to electrical based powertrains, they rely on two separate power nets. Here electrical power must be transferred from the electrical drive train net to the standard net. This typically is realized employing...
This paper introduces an application of wind energy conversion system (WECs) with matrix converter. Due to the enormous advantage of WECs make it suitable source of energy. When the wind speed changes the generated voltage rms value and frequency will be changes and this will effect on the performance of the load so matrix converter is used to control the voltage and frequency of the load. A self-excited...
This paper presents a design of converter controllers and filters of Line Commutated Converter High voltage direct current (LCC-HVDC) power transmission system to increase loadability and reliability of long power transmission. Also the proposed tuned PI controllers for HVDC Converters are verified in sense of HVDC transmission system performance and reliability. The studied system performances are...
This paper presents simple control of a variable speed stand-alone wind turbine with a permanent magnet synchronous generator (PMSG) to get constant voltage. The system consists of a wind turbine, PMSG, un-controlled rectifier and voltage source inverter using PI control. The parameters of PI control are calculated by using try and error method. The system is modified by using a switch mode rectifier...
Modular Multilevel Converter is a widely accepted technology for HVDC applications. It consists of several sub-modules or cells connected in cascade. These are bidirectional chopper cells and each one of them has a floating capacitor. This paper discusses the modulation and voltage balancing strategies which are essential for the converter to work as rectifier or inverter. The discussion is followed...
Mainly in more electric aircraft (MEA) electric power capacity is increasing rapidly. And so due to the advent of electric power system (EPS) all pneumatic, hydraulics & bleed engines are removed. Hence the consumption of fuel is reduced. Disturbances caused by various components in electrical system can inject harmonics into the system and thereby Transformer Rectifier Unit (TRU) is used for...
The doubly fed induction generator (DFIG) is the most used technology when it comes to the production of the electric energy for wind power generation. It has the advantage to insure a variable speed operation that will maximize the power extracted from the wind, increase the energy efficiency, reduce the torque oscillations and to generate an electric power with better quality. When we talk about...
In this work a three-phase power supply to emulate voltage disturbances that occur in an electrical network is presented. The type of disturbances that can be generated are voltage drop (voltage sags), over voltage (voltage swell). To maintain the value of the disturbance is necessary to implement a close loop with a control technique on it. Three control schemes were probed in this work: PI, PID...
An electric vehicle (EV) energy management system concept is proposed in this work. Its goal is to prevent power outage in residences and delivery/receive energy to/from the utility grid, in case of local grid disturbances. Unlike the vehicle-to-home (V2H) systems known in the literature, the power system does not require structural changes in a typical home EV battery charging system. Such system...
In this paper, the mathematical model of type-4 wind turbine topology is developed to represent its dynamic behavior. The main objective of a type-4 wind turbine is to deliver active power to the system, but to perform this action; it must absorb reactive power from the power network, causing disturbances and stress in the rest of the power system. Through the dynamic control system used in the back...
This paper introduces the mathematical model of a double boost circuit for the condition that the short circuit to ground happens to one phase of inverters, taking into account the impact of leakage inductance of power transformers. The corresponding energy transmission modes are analyzed, mainly focusing on the reason why the rectifier diode reverses voltage and the DC bus voltage rises. Then a novel...
In this paper, a SVPWM for an indirect matrix converter (IMC) with dual output inverter has been proposed to eliminate the common-mode voltage (CMV). The presented converter is a combination of the conventional rectifier stage and a dual inverter stage for feeding open-end winding load. The principles of selecting suitable active vectors and zero vectors and then properly arranging the switching sequence...
This paper presents a power scheme known as back-to-back used as a power conditioner for a wind turbine system which uses a permanent magnet synchronous generator (PMSG). The back-to-back power structure consists of a three-phase pulse width modulated (PWM) active rectifier, a dc-link bus voltage and a three-phase PWM inverter. Both power conditioning structures can be operated under traditional and...
Electric drives form a huge portion of industrial equipment. Modern drives have greater automation and use power electronics devices and digital technologies for control. Induction motor drives fed by voltage Source Inverters (VSI) are normally sensitive to different types of faults. Further, in drives, failure due to faults do not always lead to the complete shutdown of the motor. It is possible...
A two-stage power conversion architecture for the transmitter in wireless power transfer applications is introduced. The system achieves high efficiency at output powers up to 100W, and exhibits constant output current over varying load impedance. A front-end bridgeless totem pole rectifier provides power factor correction (PFC), necessary at the designed power level. This rectifier achieves high...
Ferroresonance is a non-linear resonance which can typically occur when a saturable magnetizing inductance forms a resonance circuit with a capacitor. An example of such a resonance condition can be a system configuration where an overhead transmission line with series compensation terminates into a HVDC converter transformer. Such a configuration may lead to post fault ferroresonance oscillations...
The paper presents the energetic performances of a system used for drying of current transformer from 110 kV Ciungetu power station. In fact, the drying process is based on an induction heating system that contains a half-controlled rectifier and a voltage source inverter that operates with resonant load. Two frequencies are taken into consideration for the inverter control. The former is the resonance...
This paper presents a novel approach to the multi pulse voltage converters (VC), especially voltage source inverters (VSI) and matrix converters (MC) based on several typical identical modules connected in parallel using coupled reactors. Such arrangements resulting in lower voltage distortions at extremely low switching frequency. The proposed arrangement was validated by simulation. Laboratory models...
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