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Description: 针对兆瓦级风电并网逆变器主电路研制中存在的并联扩容、开关频率较低和LCL滤波器难以优化设计等问题，提出了采用交流侧串接电感再进行并联的均流方案，采用载波移相技术提高变流器的等效开关频率，提出了LCL滤波器的设计原则，并给出了上述设计的理论依据和实现方法。通过对2兆瓦风电变流器主电路的仿真验证了上述技术方案。-MW-class wind power for grid-inverter main circuit of the parallel development of existing capacity, a lower switching frequency and LCL filter design difficult to optimize the problem, a series inductor AC side in parallel are further flow program, the use of carrier phase-shifting technology to enhance the equivalent converter switching frequency, a LCL filter design principles, and gives the above-mentioned theoretical basis for the design and implementation. 2 MW of wind power converter main circuit simulation program to verify the above-mentioned technology.
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Size: 212992 |
Author: cesc |
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Description: 介绍了交流励磁变速恒频双馈风力发电机组的工作原理,从双馈发电机的数学模型出发,采用矢量控制技术,在
Matlab /Simulink环境下建立了系统模型,进行了发电机有功无功独立调节的仿真研究。研究结果表明变速恒频双馈风力发电
机组具有良好的动态特性,并为风力发电系统的进一步应用研究提供了可靠的理论依据.-Introduced the AC-excited doubly-fed VSCF wind turbine working principle, from the doubly-fed generator mathematical model, the use of vector control technology, in the Matlab/Simulink environment to establish a system model for the generator active and reactive power independently Simulation of regulation. The results show that the doubly-fed VSCF wind turbine has a good dynamic characteristics and wind power generation system for further applied research to provide a reliable theoretical basis.
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Size: 502784 |
Author: 朱珠 |
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Description: This to certify that the sis entitled, “Study Of Wind Turbine Driven
Induction Generator Using AC/DC/AC converter” submitted by Ashish Kumar
Agrawal, Bhaskar Munshi and Srikant Kayal in partial fulfillment of the
requirements for the award of Bachelor of Technology Degree in Electrical
Engineering at the National Institute of Technology, Rourkela (Deemed
University) is an authentic work carried out by them under my supervision.
And to the best of my knowledge, the matter embodied in the thesis has not been
submitted to any other University/Institute for the award of any Degree or
Diploma.-This is to certify that the thesis entitled, “Study Of Wind Turbine Driven
Induction Generator Using AC/DC/AC converter” submitted by Ashish Kumar
Agrawal, Bhaskar Munshi and Srikant Kayal in partial fulfillment of the
requirements for the award of Bachelor of Technology Degree in Electrical
Engineering at the National Institute of Technology, Rourkela (Deemed
University) is an authentic work carried out by them under my supervision.
And to the best of my knowledge, the matter embodied in the thesis has not been
submitted to any other University/Institute for the award of any Degree or
Diploma.
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Size: 686080 |
Author: proust |
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Description: Efficiency and Performance Analysis of AC and DC Grid Based Wind Farms Connected to a High Voltage DC Transmission Line
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Size: 5563392 |
Author: jirayasama |
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Description: A power inverter is a device that converts DC power (also known as direct current), to standard AC power (alternating current). Inverters are used to operate electrical equipment from the power produced by a car or boat battery or renewable energy sources, like solar panels or wind turbines. DC power is what batteries store, while AC power is what most electrical appliances need to run so an inverter is necessary to convert the power into a usable form.
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Size: 88064 |
Author: sakthivel |
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Description: On the Causes of Circulating Currents in PWM
Drives With Open-End Winding AC Machines
Phase-Shifting-Transformer-Fed Multimodular
Matrix Converter Operated by a
New Modulation Strategy
An All-DC Offshore Wind Farm With
Series-Connected Turbines: An Alternative to the
Classical Parallel AC Model?
Reactive Power Control of Permanent-Magnet
Synchronous Wind Generator With Matrix Converter
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Size: 7259136 |
Author: sina |
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Description: During the past decade, Wind energy have attracted interest as a result of the increasing concern about CO2 emissions. The doubly fed induction generators (DFIGs)have been widely used in modern wind energy systems, due
to the advantages of variable speed operation and four quadrant active and reactive power capabilities. In DFIG,the stator is directly connected to the grid and the rotor is connected to the grid by a bidirectional converter. The
converter connected to the rotor controls active and the reactive power between the stator of the DFIG and ac supply or a standalone grid.
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Size: 503808 |
Author: ali |
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Description: The conversion of multicircuit ac transmission lines
to hybrid ac/dc lines is a promising way of substantially increasing
transmission capacities in areas where it is difficult to obtain
new rights of way. Critical questions related to such a conversion
include the impact on the electric fields and ion currents at the
ground level, as well as the dc current coupling into the ac phases.
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Size: 548864 |
Author: yujiaxian |
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Description: The conversion of multicircuit ac transmission lines
to hybrid ac/dc lines is a promising way of substantially increasing
transmission capacities in areas where it is difficult to obtain
new rights of way. Critical questions related to such a conversion
include the impact on the electric fields and ion currents at the
ground level, as well as the dc current coupling into the ac phases.
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Size: 299008 |
Author: yujiaxian |
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Description: DOCUMENT WIND self-regulated type with protection for Overspeed. Energy stored in the battery is drawn by electricals loads through the inverter, which converts PC power into AC power. The inverter has in-built protection for Short-Circuit, Reverse Polarity, Low Battery Voltage and Over Load. The Batter Bank is designed to feed the loads up to two days, during Non-Sun/Wind days.
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Size: 19931136 |
Author: elango |
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Description: Abstract. The paper presents a squirrel-cage induction machine operating as a generator principally designed for use in small wind and
hydroelectric power stations. The main advantages of such a generator are its high reliability, low price and costs of operation and maintenance.
The asynchronous generator coupled to the grid through the AC/DC/AC converter is capable of generating energy even at low turbine speed.
The results of investigations on the AC/DC and DC/AC converters controlled by linear and nonlinear current regulators are also discussed.
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Size: 310272 |
Author: Ebrahim Asadi |
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Description: Given these two interests for HVDC in the Norwegian offshore, the use of Multiterminal HVDC
(MTDC) is a potential solution for the integration of the wind farms and oil/gas platforms into the
onshore grid.
Control systems for multiterminal HVDC (MTDC) networks should be developed and their
operation be analyzed. First controllers for two-terminal HVDC connected to different types of AC
grids must be developed and analyzed. Then this must be extended to develop control of
multiterminal HVDC system. Models should be developed in PSCAD/EMTDC simulation software
and results should be analyzed to validated proposed control schemes.
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Size: 2548736 |
Author: live |
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Description: This Paper consists on the study of one part of wind energy system conversion, its AC side.
Renewable resources are in constant fluctuation. This situation could put in peril the energizing efficiency towards a given demand requirement.
Therefore, in order to maximize the efficiency of the renewable energy system, it is necessary to track the maximum power point of the input source, a study established under MATLAB/Simulink platform. For the wind system, the maximizing is assured while considering the optimal power curve as load characteristic, with the knowledge of the turbine characteristic Cp (λ).
Then, this work elaborates the analysis and simulation of a low speed Permanent Magnet Synchronous Generator (PMSG) driven by a vertical wind turbine through a Pulse-Width Modulation (PWM) voltage inverter, independently of the DC components of the wind system conversion, using MATLAB computer simulation. -This Paper consists on the study of one part of wind energy system conversion, its AC side.
Renewable resources are in constant fluctuation. This situation could put in peril the energizing efficiency towards a given demand requirement.
Therefore, in order to maximize the efficiency of the renewable energy system, it is necessary to track the maximum power point of the input source, a study established under MATLAB/Simulink platform. For the wind system, the maximizing is assured while considering the optimal power curve as load characteristic, with the knowledge of the turbine characteristic Cp (λ).
Then, this work elaborates the analysis and simulation of a low speed Permanent Magnet Synchronous Generator (PMSG) driven by a vertical wind turbine through a Pulse-Width Modulation (PWM) voltage inverter, independently of the DC components of the wind system conversion, using MATLAB computer simulation.
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Size: 192512 |
Author: zakary |
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Description: DC wind farm network. So far, all existing offshore wind farms have an ac collection system, and the collected power in the offshore wind farm is sent to an onshore ac grid through high-voltage ac (HVAC) or DC (HVDC) transmission lines. However, future offshore wind farms may use dc also for power collection.
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Size: 74752 |
Author: ali |
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Description: The growing need to the clean and renewable energy has led to the fast development of wind power
systems all over the world. Large wind farms are going to be connected to electrical networks which have been
series compensated to guarantee the safe and stable transmission of bulk power. However a series compensated
power system may encounter with a very important problem known as subsynchronous resonance (SSR). Flexible ac
transmission systems (FACTS) controllers are widely applied to mitigate subsynchronous oscillations.
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Size: 119808 |
Author: phdscolar11
|
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Description: MATLAB模型，双馈风电机组基于最大功率跟踪，低风速超速控制，中风速高风速变桨距控制(DFIG MATLABThe wind turbine and the doubly-fed induction generator (WTDFIG) are shown in the figure called The Wind Turbine and the Doubly-Fed Induction Generator System. The AC/DC/AC converter is divided into two components: the rotor-side converter (Crotor) and the grid-side converter (Cgrid). Crotor and Cgrid are Voltage-Sourced Converters that use forced-commutated power electronic devices (IGBTs) to synthesize an AC voltage from a DC voltage source. A capacitor connected on the DC side acts as the DC voltage source. A coupling inductor L is used to connect Cgrid to the grid. The three-phase rotor winding is connected to Crotor by slip rings and brushes and the three-phase stator winding is directly connected to the grid. The power captured by the wind turbine is converted into electrical power by the induction generator and it is transmitted to the grid by the stator and the rotor windings.)
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Size: 82944 |
Author: zzZZ0202 |
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