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Detection-of-short-duration-power-quality-disturba
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)
- 2021-04-08 19:39:00下载
- 积分：1
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Matlab-codes
finger print segmentation,基于matlab，无需修改，直接可用
- 2013-11-05 16:26:59下载
- 积分：1
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1
说明： 四旋翼无人机是一种可以被遥控也可以在无人为控制的状态下执行预定任务的飞行器，与传统直升机相比四旋翼飞行器的机械结构简单，且具有高精度，灵活精度以及较低成本的特点，被广泛用于军事侦察，农艺播撒、快递派送、摄影工作等领域。四旋翼飞行器自身具有欠驱动、多变量、非线性等特性，在外界的噪声干扰情况下，增加了四旋翼无人机的不稳定以及控制系统的设计难度。所以对四旋翼飞行器的位姿控制的研究，可以开拓科研人员对控制算法以及滤波算法的认知，具有重要的研究意义。(Four-rotor UAV is a kind of aircraft that can be controlled remotely or perform scheduled tasks without human control. Compared with traditional helicopters, the Four-rotor UAV has simple mechanical structure, high precision, flexible precision and low cost. It is widely used in military reconnaissance, agricultural broadcast, express delivery, photography and other fields. Four-rotor UAV has the characteristics of under-actuation, multi-variable and non-linearity. Under the circumstance of external noise, the instability of Four-rotor UAV and the difficulty of control system design are increased. Therefore, the research on attitude control of Four-rotor aircraft can broaden the knowledge of control algorithm and filtering algorithm for researchers, and has important research significance.)
- 2019-05-19 08:35:54下载
- 积分：1
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MatLab2
说明： 由于matlab提供了一些很有用的计算方法
但是大部分用户只用到其中一部分的功能
所以写了一个包括解方程，矩阵计算，排序功能的代码(As matlab provides some very useful method but most users only use part of the function it was a including solving equations, matrices, and sorting code)
- 2010-05-03 10:22:44下载
- 积分：1
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lgkt
用龙格库塔发解二阶微分方程，共三个小程序，初学者可以直接调用龙格库塔源程序(With solutions of second order differential equations Runge-Kutta hair, a total of three small programs, beginners can directly call the Runge-Kutta source)
- 2014-10-10 22:23:47下载
- 积分：1
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MTCL_MUSIC
基于MUSIC的MIMO雷达DOA、DOD估计(DOD and DOA estimation for MIMO radar based on MUSIC)
- 2019-03-20 16:55:01下载
- 积分：1
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fenzhidingjie
运筹学中利用MATLAB实现分支定界算法的实现，其中求最优解利用linprog函数实现
- 2009-06-17 12:29:31下载
- 积分：1
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关于差分进化的改进的代码 OXDE
文档是关于差分进化的改进的代码，使用正交设计，提高了算法的性能，内有测试函数和测试数据，可直接运行。(Documentation is improved code on differential evolution using orthogonal design and improve the performance of the algorithm, there are test functions and test data, can be run directly.)
- 2014-11-21 09:16:49下载
- 积分：1
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cross-efficiency_dea
比传统的CCR和BCC模型评价结果更客观、真实的DEA模型，考虑了不同决策单元的意见。(Which is more objective than the traditional CCR and BCC model. The real DEA model, taking into account the views of different decision-making units.)
- 2016-12-01 09:39:17下载
- 积分：1
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FFT
计算信号的谱特性，包括频谱特征及功率谱特征。(Calculate the spectral characteristics of the signal, including spectral characteristics and power spectral features.)
- 2011-05-31 16:31:06下载
- 积分：1
