Journal Article•
Power Electronics Converters and Wind Turbine
01 May 2017-International Journal of Engineering Development and Research (IJEDR(www.ijedr.org))-Vol. 5, Iss: 2, pp 1199-1205
About: This article is published in International Journal of Engineering Development and Research.The article was published on 2017-05-01 and is currently open access. It has received 139 citations till now. The article focuses on the topics: Turbine.
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TL;DR: A new topology of a hybrid distributed generator based on photovoltaic and wind-driven permanent magnet synchronous generator is proposed, which has fewer power converters than earlier schemes.
Abstract: A new topology of a hybrid distributed generator based on photovoltaic and wind-driven permanent magnet synchronous generator is proposed. In this generator, the sources are connected together to the grid with the help of only a single boost converter followed by an inverter. Thus, compared to earlier schemes, the proposed scheme has fewer power converters. A model of the proposed scheme in the $d-q$ -axis reference frame is developed. Two low-cost controllers are also proposed for the new hybrid scheme to separately trigger the dc–dc converter and the inverter for tracking the maximum power from both sources. The integrated operations of both proposed controllers for different conditions are demonstrated through simulation and experimentation. The steady-state performance of the system and the transient response of the controllers are also presented to demonstrate the successful operation of the new hybrid system. Comparisons of experimental and simulation results are given to validate the simulation model.
103 citations
Cites methods from "Power Electronics Converters and Wi..."
...The rectifier dc output voltage (VR) and current (IR) in terms of stator phase voltage VS (rms) and stator current IS (rms) are given as [16], [17]...
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TL;DR: In this article, the authors proposed a chaotic space vector modulation (CAFSV-DTC) method to reduce EMI, acoustic noise and current harmonics which occur in the classical DTC method.
Abstract: In this paper a study is presented about the reduction of electromagnetic interference (EMI) in Direct Torque Control (DTC) method by the means of chaotic space vector modulation. Space Vector Modulated Direct Torque Control (SV-DTC) is a method developed to reduce current and moment fluctuations which stem from the hysteresis controllers used in classical DTC method. The switching frequency amplitude was changed chaotically in a Space Vector Modulated Direct Torque Control (FFSV-DTC) having a Fixed switching frequency, and Chaotic Space Vector Modulated Direct Torque Control (CAFSV-DTC) method having chaotic amplitude modulated switching frequency was obtained. CAFSV-DTC method was suggested to reduce EMI, acoustic noise and current harmonics which occur in FFSV-DTC method. For this purpose, the proposed CAFSV-DTC method, using a Permanent Magnet Synchronous Motor (PMSM) drive, is compared to Random Amplitude Frequency method (RSV-DTC) and FFSV-DTC. Simulation results indicate that the proposed method yields better results. DOI: http://dx.doi.org/10.5755/j01.eee.22.1.14097
103 citations
Cites background from "Power Electronics Converters and Wi..."
...These currents are strong sources of EMI [22]....
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TL;DR: In this article, a new high-voltage gain resonant switched-capacitor dc/dc converter for high-power offshore wind energy systems is presented. And the proposed converter is characterized by the resonant switching transitions to achieve minimal switching losses and maximum system efficiency.
Abstract: With the increasing integration of renewable energy generation into high-power grids, transmission at the dc level is becoming increasingly more useful than ac transmission. In this regard, emerging applications, such as offshore wind farms, require a high voltage gain dc/dc conversion system to interface with high-power transmission networks. This paper presents a new high-voltage gain resonant switched-capacitor dc/dc converter for high-power offshore wind energy systems. The proposed dc/dc converter is characterized by the resonant switching transitions to achieve minimal switching losses and maximum system efficiency. Therefore, a higher switching frequency is conceivable to attain a higher power density. The double stage output voltage of the proposed converter operates at seven times as high as the input voltage with a small device count. The output capacitors are charged and discharged continuously by a 180° phase shift with respect to each other to eliminate the output voltage ripples with the low capacitance requirements. The proposed series-modular and cascade configurations show the intrinsic advantage of being readily applicable to multistage power switching converters. The developed topology has been implemented on a 5-kW prototype converter to test its feasibility.
99 citations
Cites background from "Power Electronics Converters and Wi..."
...Single-module dc/dc boost converters can theoretically achieve infinite voltage conversion ratios but practically, the maximum gain is limited by circuit imperfections, such as parasitic elements and switch commutation times [17], [18]....
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...3) the switching frequency is less than the resonant frequency to achieve a zero-current switching (ZCS) [17]; 4) Vs is an ideal dc-voltage source and the load is modeled by a pure resistor (Rload)....
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TL;DR: In this paper, an adaptive maximum power point tracking (MPPT) algorithm was proposed for small-scale wind energy conversion systems (WECSs) to harvest more energy from turbulent wind.
Abstract: This paper presents an adaptive maximum power point tracking (MPPT) algorithm for small-scale wind energy conversion systems (WECSs) to harvest more energy from turbulent wind. The proposed algorithm combines the computational behavior of hill climb search, tip speed ratio, and power signal feedback control algorithms for its adaptability over wide range of WECSs and fast tracking of maximum power point. In this paper, the proposed MPPT algorithm is implemented by using buck–boost featured single-ended primary inductor converter to extract maximum power from full range of wind velocity profile. Evaluation of the proposed algorithm is done on a laboratory-scaled dc motor drive-based WECS emulator. TMS320F28335, 32-bit floating point digital signal controller, is used to execute the control schemes of the in-lab experimental setup. Experimental results show that tracking capability of the proposed algorithm under sudden and gradual fluctuating wind conditions is efficient and effective.
78 citations
Cites background from "Power Electronics Converters and Wi..."
...To derive the basic relations, assuming that both the commutating angle and commutating inductance are negligible, the relation between diode rectifier output voltage, VDC and line voltage at terminals of PMSG, Vt , can be related as [22],...
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TL;DR: A novel application of smart meters (SMs) in the high impedance fault (HIF) detection in distribution systems that detects HIF depending on the amount of even harmonics present in the voltage waveforms measured by SMs.
Abstract: This paper presents a novel application of smart meters (SMs) in the high impedance fault (HIF) detection in distribution systems. Detection of HIF on distribution systems poses a significant challenge to the protection engineers. Existing HIF detection methods primarily use measurements available at distribution substations. Lack of availability of measurements near the fault points often makes HIF detection further difficult. The proposed method utilizes the voltage measurements of SMs to address this issue. HIF detection in the presence of nonlinear loads is another challenge. The proposed method detects HIF depending on the amount of even harmonics present in the voltage waveforms measured by SMs. The performance of the proposed method has been evaluated using both PSCAD simulations and experimental set-up. The proposed method has also been implemented on a commercial energy meter to show its viability. The performance of the proposed method has also been evaluated considering HIF, voltage sag-swells, capacitor/load switching, transformer energization, feeder energization, power electronic loads, arc furnace loads, and distributed generators. The proposed method performs satisfactorily in the investigated scenarios. The performance of the proposed method has also been compared with the existing HIF detection methods.
78 citations
Cites background from "Power Electronics Converters and Wi..."
...strictly as odd multiple of fundamental frequency to ensure that the output voltage waveform has half-wave symmetry and free of any DC or even harmonics [36]....
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