Description: 基于小波变换模极大值的电能质量扰动检测与定位.rar-based on wavelet transform modulus maxima of the power quality disturbance detection and location. Rar Platform: |
Size: 148338 |
Author:郑华珍 |
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Description: 基于小波变换模极大值的电能质量扰动检测与定位.rar-based on wavelet transform modulus maxima of the power quality disturbance detection and location. Rar Platform: |
Size: 148480 |
Author:郑华珍 |
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Description: 基于小波和fft的电能质量检测:扰动检测,稳态检测-Fft based on wavelet and the power quality detection: disturbance detection, steady-state testing Platform: |
Size: 10240 |
Author: |
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Description: 电能质量扰动信号，产生电压凹陷、谐波等信号。可以另外下载ST变换的源代码-Power quality disturbance signals, resulting in voltage sag, harmonics and other signals. In addition ST can download the source code transformation Platform: |
Size: 26624 |
Author:xfw |
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Description: MDL判据在电能质量扰动信号数据压缩中的应用,适合电力系统分析的研究人员参考。-MDL criterion in the power quality disturbance signal data compression application, suitable for power system analysis of the researchers for reference. Platform: |
Size: 249856 |
Author:何永远 |
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Description: 一个毕业程序设计，是用小波和支持向量机对电能质量扰动的识别与分类，主要利用的能量特征。-A graduate program design is the use of wavelet and support vector machines for power quality disturbance recognition and classification, the main characteristics of energy use. Platform: |
Size: 2048 |
Author:张新新 |
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Description: 产生几种典型的电能质量扰动信号源及其该信号源的ST变换-Produced several typical power quality disturbance source and the transformation of the source ST Platform: |
Size: 26624 |
Author:胡昭华 |
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Description: 优秀论文及配套源码。电压暂降是动态电能质量问题中最受关注的热点之一。大量新型电力电子设备的广泛使用对电网电能质量的要求越来越高，而且电压暂降在电网中又具有一定的传播性。因此，无论从电网还是用户都迫切需要对电压暂降进行研究和治理。对电压暂降的检测是解决电压暂降的前提条件，故本论文主要对电压暂降的检测方法进行研究。
本文分析了国内外短时电能质量扰动检测的研究现状，并着重讨论了短路故障、感应电动机启动和变压器激磁三种电压暂降扰动情况下电压暂降的特性；在此基础上选择了基于S变换的短时电能质量扰动检测方法，从S变换的结果S模矩阵及S复矩阵中提取出所需数据并以此来对各种扰动情况下的电压暂降的幅值、相位跳变、持续时间和谐波含量进行分析。仿真结果表明，该方法很好地实现了对电压暂降各特征量的检测。
-The voltage sag is one of most hot topics in dynamic electric energy problems. Masses of new power and electron facilities have been put into use widely, requiring a high quality of electric network and power, chiefly the voltage sag. Moreover, the voltage sag can spread in the electric network. So people have every reason to research and control the voltage sag. However, before developing the voltage sag, people have to detect it. On account of the above, this essay will chiefly focus on the detect methods of the voltage sags.
In this paper, the status of the short duration power quality disturbance based on the different method are researched firstly, and emphasizes the characteristic of the voltage sag under the situation of the three kinds of voltage sag disturbances like the short circuit fault, induction motor start-up and transformer excitation. On the basis of the above, the short duration power quality disturbance detection method based on S transform is chosen. The complex m Platform: |
Size: 541696 |
Author:NBB |
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Description: 优秀论文及配套源码。Hilbert-Huang变换(HHT)是一种新的非平稳信号处理技术，该方法由经验模态 分解(EMD)与Hilbert谱分析两部分组成。任意的非平稳信号首先经过EMD方法处理后被分解为一系列具有不同特征尺度的数据序列，每一个序列称为一个固有模态函数(IMF)，然后对每个IMF分量进行Hilbert谱分析得到相应分量的Hilbert谱，汇总所有Hilbert谱就得到了原信号的谱图。该方法从本质上讲是对非平稳信号进行平稳化处理，将信号中真实存在的不同尺度波动或趋势逐级分解出来，最终用瞬时频率和能量来表征原信号的频率含量。
本文研究了基于HHT的暂态电能质量扰动检测方法，介绍了HHT的基本原理和利用HHT检测电能质量多扰动信号的实现方法。仿真试验表明该方法可以实时检测扰动的起止时刻，持续时间和扰动幅度，适用于电能质量多扰动的监测和辨识系统。
-Hilbert-Huang Transform(HHT) is a new non-stationary signal processing technology，including the Empirical Mode Decomposition(EMD) and Hilbert spectral analysis．In this method，arbitrary non-stationary signals was divided into a series data sequence with different characteristic scales after the first EMD treatment，each sequence is called an intrinsic mode function(IMF)，and then each IMF component gained corresponding the Hilbert spectrum though Hilbert spectrum analysis，a summary of all Hilbert spectrum assembled to the spectra of the original signal．In essence，this method is a stable processing for non-stationary signal，which decomposed the different fluctuations or trends in the signal in rum，and represented the frequency content of the original signal using the final instantaneous frequency and energy．
This paper study a method to detect power quality disturbances based on the HHT，in which the principle and the realization of the HHT and the realization of power quality disturbance Platform: |
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Author:NBB |
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Description: 本程序是基于S变换的短时电能质量扰动检测方法实现的，用于分析电压暂降的幅值、相位跳变、持续时间和谐波含量进行分析-This procedure is based on the S transform short-term power quality disturbance detection method implemented for the analysis of voltage sag magnitude, phase transition, duration, and harmonic content analysis Platform: |
Size: 18432 |
Author:gaocheng |
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Description: 本文提出了一种自动检测和电能质量扰动分类模糊专家系统。有关干扰的类型包括电压骤降，骤升，中断，切换瞬变，冲动，闪烁，谐波和缺口。据推测，在所分析的波形采样的形式提供。傅立叶变换和小波分析，利用独特的功能获得的波形一个模糊专家系统为主体的决定有关的干扰类型而设计的。仿真研究，验证了该方法的比较研究人工神经网络为基础的分类方法和该方法研究的准确性也报告，以显示该方法的优点-This paper presents a fuzzy-expert system for automated detection and classification of power quality disturbances. The types of concerned disturbances include voltage sags, swells, interruptions, switching transients, impulses, flickers, harmonics, and notches. It is assumed that the analyzed waveforms are available in sampled form. Fourier transform and wavelet analysis are utilized to obtain unique features for the waveforms A fuzzy-expert system is designed for making a decision regarding the type of the disturbance. Simulation studies are presented to verify the accuracy of the proposed approach Comparison studies between an Artificial Neural Network based classification technique and the proposed approach are also reported to show the advantages of the proposed approach. Platform: |
Size: 444416 |
Author:韩小峰 |
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Description: 基于JPEG2000的电能质量扰动数据压缩方法JPEG2000 based power quality disturbance data compression method-JPEG2000 based power quality disturbance data compression method Platform: |
Size: 854016 |
Author:zz222 |
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Description: 基于离散余弦变换和小波变换的电能质量扰动信号检测方法-Based on the discrete cosine transform and wavelet transform power quality disturbance signal detection method Platform: |
Size: 327680 |
Author:WU |
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Description: 形态滤波器用到的一些相关源程序，可以用于电能质量检测扰动信号定位中。-Morphological filter is used in some related source code, can be used for positioning in the detection of power quality disturbance signal. Platform: |
Size: 5120 |
Author:laura |
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Description: HHT变换之END分解程序，以及详细的例子--power system power quality disturbance-HHT and EMD and examples about power quality Platform: |
Size: 272384 |
Author:鹏love敏 |
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