Description: 在理 论 分 析与仿真的基础上，本文对上述三种控制策略进行了实验研究，设计了控制系统的硬件电路和DSP程序。实验结果给出了三种控制方法下的稳态波形与电流谐波分析，系统动态响应波形和双重化结构谐波抑制的验证。实验结果与理论分析吻合，表明一定控制下的PWM 变流器具有较好的稳态与动态工作性能，适用于大功率风力发电应用场合。-In the theoretical analysis and simulation based on this article on the above three control strategies were studied, the design of the control system hardware circuit and the DSP program. The experimental results give the three control methods under steady-state waveform and current harmonic analysis, the system dynamic response waveform and harmonic suppression structure of double authentication. The experimental results coincide with theoretical analysis, shows that under the control of PWM converter has good steady-state and dynamic performance for high-power wind power generation applications. Platform: |
Size: 2764800 |
Author:weipeiyong |
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Description: 这是一段关于计算电流中谐波含量的M文件，用MATLAB实现，精确度很高。-This is a paragraph on the calculation of current harmonic content of M documents, using MATLAB implementation, high accuracy. Platform: |
Size: 1024 |
Author:黄勇 |
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Description: 本文首先介绍了有源电力滤波器的基本结构和工作原理，并对一些常规的谐波电流检测方法的优缺点进行了比较。其次，针对传统的谐波电流检测方法的缺陷，提出将神经网络与基于噪声抵消原理的自适应谐波检测相结合，利用径向基函数运算量小、收敛快、无局部极小值等优点，构造了一种基于径向基函数神经网络的谐波电流检测方法，仿真结果表明该检测方法具有很好的动态响应及畸变电流检测精度。最后，设计了一套实验系统，对本文所采用的系统方案进行了实验验证。仿真表明，本文所采用的有源电力滤波器检测系统方案切实可行，能够较好地实现动态检测谐波和无功功率的目的。 -This paper, firstly, introduces the basic structure and principle of APF, and then makes comparison among some conventional harmonics detections methods. Secondly, contraposes the limitation of the traditional harmonic current detecting method based on neural network, presents the method that combines the neural network and auto adaptive harmonic current detecting method based on the principle of noise each other eliminating.As the characteristics that are small calculative quantity, fast converge, without local minimal point of Redial Basis Function (RBF), this dissertation forms a new harmonic current detecting method based on RBF. The simulation results show that the method has many advantages, such as good dynamic response, high accuracy. At last, A system is designed to verify the proposed APF scheme .The results of simulation show that the proposed APF scheme is practical and can detect harmonics and reactive power effectively. Platform: |
Size: 1900544 |
Author:ＭＣ |
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Description: ATT7022B的中文版技术资料；该芯片能测量电压、电流、电能、功率因数及谐波分析等多种参数。-ATT7022B Chinese version of the technical information The chip can measure voltage, current, power, power factor and harmonic analysis, a variety of parameters. Platform: |
Size: 70656 |
Author:胡锟 |
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Description: 基于谐波电流快速检测方法的并联型有源电力滤波器设计。用于毕业设计-Harmonic Current Detection Method Based Shunt Active Power Filter. For graduation Platform: |
Size: 4926464 |
Author:杨强 |
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Description: 基于谐波电流快速检测方法的并联型有源电力滤波器设计 不错的 可以做毕业设计-Harmonic Current Detection Method Based Shunt Active Power Filter can do a good graduation Platform: |
Size: 4582400 |
Author:杨强 |
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Description: Methods for limitation and elimination of disturbances and harmonic pollution in the power system have been widely investigated. This problem rapidly intensifies with the increasing amount of electronic equipment (computers, radio set, printers, TV sets etc.). This equipment, a nonlinear load, is a source of current harmonics, which produce increase of reactive power and power losses in transmission lines. The harmonics also cause electromagnetic interference and, sometimes, dangerous
resonances. They have negative influence on the control and automatic equipment, protection systems, and other electrical loads, resulting in reduced reliability and availability. Moreover, nonlinear loads and non-sinusoidal currents produce non-sinusoidal voltage drops across the network impedanceis, so that non-sinusoidal voltages appears at several points of the mains. It brings out overheating of line,transformers and generators due to the iron losses. - Methods for limitation and elimination of disturbances and harmonic pollution in the power system have been widely investigated. This problem rapidly intensifies with the increasing amount of electronic equipment (computers, radio set, printers, TV sets etc.). This equipment, a nonlinear load, is a source of current harmonics, which produce increase of reactive power and power losses in transmission lines. The harmonics also cause electromagnetic interference and, sometimes, dangerous
resonances. They have negative influence on the control and automatic equipment, protection systems, and other electrical loads, resulting in reduced reliability and availability. Moreover, nonlinear loads and non-sinusoidal currents produce non-sinusoidal voltage drops across the network impedanceis, so that non-sinusoidal voltages appears at several points of the mains. It brings out overheating of line,transformers and generators due to the iron losses. Platform: |
Size: 2214912 |
Author:lakhdar |
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Description: 基于谐波电流快速检测方法的有源电力滤波器simulink仿真模型
-Current rapid detection methods based on harmonic active power filter simulink simulation model Platform: |
Size: 14336 |
Author:流沙 |
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Description: 通过对周期性电压电流波形的起始时间与其相应的各
次谐波分量初始相位之间的关系进行研究，指出谐波源的特
性可以由其在基波电压初相位为零时的特性所唯一确定-Periodic voltage and current waveforms on the start time of its corresponding harmonic component of the relationship between the initial phase of research, pointed out that the characteristics of harmonic sources can be its initial phase in the fundamental zero-voltage characteristics of the CD a definite Platform: |
Size: 295936 |
Author:wulei |
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Description: 基于瞬时无功功率理论、滞环电流控制的三相电力有源滤波器Matlab仿真模型-The model of APF is established by the Power System of Matlab.The calculation of harmonic current based on three-phase instantaneous reactive power theory and hysteresis current tracking control strategy are analyzed. Platform: |
Size: 460800 |
Author:赵峰 |
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Description: 基于pq谐波电流检测的三相三线制有源滤波器模型。-Pq harmonic current detection based on three-phase three-wire active filter model. Platform: |
Size: 20480 |
Author:Qiu lin |
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Description: Line Matrix is line impedance matrix.
load_power Matrix is P+jQ matrix of the loads.
source matrix is the complex value of the harmonic sources and they considered as a harmonic current source for each harmonic frequency. Platform: |
Size: 4096 |
Author:Karthi |
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Description: 三相并联有源电力滤波器，基于瞬时无功理论的ip-iq电流检测法，三角波比较控制，抑制谐波电流-Three-phase shunt active power filter based on instantaneous reactive power theory, ip-iq current detection method, the triangular wave comparison control, inhibition of the harmonic current Platform: |
Size: 11264 |
Author:王刚 |
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Description: 基于瞬时无功功率理论的谐波电流检测的matlab仿真模型。经验证可很好运行。-Matlab simulation model based on instantaneous reactive power theory of harmonic current detection. Proven to be a good run. Platform: |
Size: 10240 |
Author:stone |
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Description: 并联型电压源型有源电力滤波器的无差拍控制的Matlab仿真。通过线性预测算法预测谐波电流在下一个时刻的参考值以实现谐波电流的跟踪。-Deadbeat control simulation of shunt type APF ,prediction control with linear prediction method to tracing the harmonic current. Platform: |
Size: 13312 |
Author:王凤楠 |
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Description: Based on the boundary characteristic of a dc transmission
line, the response of transient harmonic current in the
line-commutated converter HVDC transmission system is analyzed
under various fault conditions in this paper. A new transient
harmonic current protection scheme is proposed. The discrete
Fourier transform is used to extract transient harmonic currents
at both terminals of the dc transmission line and the type of fault
can be identified by the transient harmonic currents. Two main
factors including fault resistance and fault location that affect
performance of the protection are also discussed in this study. The
test system is modeled based on the CIGRE benchmark including
distributed parameters of the dc transmission line. Comprehensive
test studies show that the performance of the transient harmonic
current protection scheme is encouraging. It can not only identify
internal faults and external faults correctly and quickly, but also
can respond to high ground resistance faults. Platform: |
Size: 3584000 |
Author:ASHOK KUMAR |
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