Description: 多功能低压配网无功补偿装置。该装置集多种功能为一体，具有动态无功补偿，配变监测，谐波测量和分析、计量!、通讯等功能。-low-voltage distribution network multifunctional reactive compensation devices. The installation of a multi-functional integration, dynamic reactive power compensation, distribution transformer monitoring, measurement and harmonic analysis, measurement! , communications, and other functions. Platform: |
Size: 64512 |
Author:飞扬 |
Hits:
Description: 使用labview7.1编写的一个简单的虚拟电能质量检测仪，监测参数包括电压偏差、频率偏差、频域谐波分析、电压波动、三相不平衡度等。-Labview7.1 prepared using a simple detector of virtual power quality, monitoring parameters, including voltage deviation, frequency deviation, frequency-domain harmonic analysis, voltage fluctuations, such as three-phase imbalance. Platform: |
Size: 61440 |
Author:robyluo |
Hits:
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 |
Hits:
Description: 本文以双Pwm变换器为基础，分析论述了电力电子装置的整流、逆变和回馈状态的国内外发展状况。随着科学技术的发展，电力电子装置的低功率因数和高谐波污染已经成为电网的两大主要危害，因此提高系统功率因数便是电力电子技术的发展趋势，本文阐述了功率因数的定义，脉宽调制的种类以及电压
型PWM变换器的原理、控制方法等内容，比较了脉宽调制的各种类型，详细推导了三相电压型PWM变换器的数学建模，指出系统各种控制方法的优缺点，着重表达了二相调制脉宽空间矢量WPM的算法推导，选用了系统主控芯片，编写了系统软件程序，设计了交一直一交的主电路结构，针对控制系统的要求，论
文对影响系统性能的几个主要参数进行了理论分析、推导和数值计算。
本文用Matalb仿真软件，对整个控制系统的动态性能进行了仿真与分析，验证了系统理论的正确性和可应用性，对样机的研制提供了强有力的指导作用。
论文最后，讨论了样机实验。通过一系列的实验，记录、分析样机在各种状态下的波形和数据，得出结论，做出展望，为课题的进一步研究打下了一定的基础。
-In this paper, double-Pwm converter, based on analysis of power electronic devices discussed rectifier, inverter and feedback status of domestic and foreign developments. With scientific and technological development, low-power electronic devices, power factor and high harmonic pollution has become the network s two main hazards, thus improving system power factor is the development trend of power electronics technology, this paper, the definition of power factor, pulse-width modulation types as well as voltage
-Type PWM converter principle, control methods, content, comparison of various types of pulse-width modulation, detailed derivation of the three-phase voltage-type PWM converter mathematical modeling, pointing out that the system s advantages and disadvantages of various control methods, focusing on expression of two-phase space vector pulse width modulation algorithm derived WPM, choose the system master chip, the preparation of the system software program designed to pay a d Platform: |
Size: 3617792 |
Author:狼狼 |
Hits:
Description: ： 在分析了 S V P WM原理的基础上 ， 详细介绍 了广义的不连续空间矢量 D P WM算法及其在 S i m u l i n k环
境下实现的方法， 并且对 S V P WM、 四种 D P WM算法的相电压调制波和逆变器输出线电压的谐波特征进行了比较分
析， 最后将 D P WM应用于异步电动机调速系统， 仿真结果验证了方法的可行性。-: An analysis based on the principles of SVP WM, detailing the broad discrete space vector DP WM algorithm in S imulink method realized in the environment, and on the SVP WM, the four DP WM algorithm for phase voltage modulation wave and inverter output line voltage harmonic characteristics of a comparative analysis, and finally DP WM induction motor drive system used in the simulation results demonstrate the feasibility of the method. Platform: |
Size: 376832 |
Author:Wangjg |
Hits:
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 |
Hits:
Description: simulink系统仿真：10kV 母线短路容量为10MVA，通过额定电压10/0.4kV，额定容量为100kVA，短路阻抗为5％的变压器与负荷相连， 阻感负荷RL 容量为50kVA，功率因数0.9。电力电子装置产生的5 次和7 次谐波电流均为5A；为了抑制7 次谐波在400V 母线处接入电容与变压器构成7 次滤波器。-simulink System Simulation: 10kV busbar short-circuit capacity of 10MVA, through the rated voltage 10/0.4kV, the rated capacity of 100kVA, short-circuit impedance of 5 of the transformer and load connected to sense the load resistance RL capacity 50kVA, power factor of 0.9. Generated by power electronic devices 5 and 7 harmonic currents are 5A to suppress harmonics in the 400V bus 7 access to capacitors and transformers constitute at 7 filter. Platform: |
Size: 10240 |
Author:othanda |
Hits:
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 |
Hits:
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 |
Hits:
Description: 恒频恒压(CVCF)逆变电源的输出电压波形质量是衡量其性能的重要指标之一。文章采用一种重复控制和双闭环控制相结合的电压波形控制策略，以重复控制器提高逆变电源输出电压的稳态精度，减小总谐波畸变率；以双闭环控制器达到较快的动态响应速度。该方案在一台采用TMS320F240 DSP控制芯片的50 Hz三相PWM逆变器上得到验证。-Constant voltage constant frequency (CVCF) Inverter output voltage waveform quality is an important measure of its performance indicators. Paper using a repetitive control and the combination of double closed loop control voltage waveform control strategy to improve the repetitive controller output voltage inverter steady-state accuracy and reduce total harmonic distortion to achieve a faster dual-loop controller dynamic response speed. The program uses TMS320F240 DSP in a 50 Hz phase control chip PWM inverter has been to verify. Platform: |
Size: 405504 |
Author:Jew |
Hits:
Description: 电力系统谐波潮流计算程序，根据各个节点谐波电力发射值采用解耦算法计算各个节点谐波电压-Harmonic voltage power system harmonic flow calculation procedures decoupling algorithm based on the harmonic power emitted value of each node, each node Platform: |
Size: 15360 |
Author:went |
Hits:
Description: 声频功率放大器的参数如下：
1.放音频率（-3dB 电平）的额定范围为25～22000HZ；
2.立体声道的有效功率为5.5W × 2；
3.低频道的有效功率为22W；
4.额定输入电压0.25V；
5.在额定输入电压时谐波系数为0.12％；
6.电压放大系数为26dB；
7.静态电流120mA～150mA；
8.电源电压为11.7～14.4V。-The acoustic parameters of the power amplifier is as follows: 1. The rated range of the playback frequency (-3dB level) is 25 ~ 22000Hz stereo channel, the effective power of 5.5W 2 low channels effective power 22W rated input voltage of 0.25V rated input voltage harmonic coefficient of 0.12 6. voltage amplification factor is 26dB quiescent current of 120mA ~ 150mA Supply Voltage 11.7 ~ 14.4V. Platform: |
Size: 1030144 |
Author:陈赵秋 |
Hits:
Description: 光伏逆变仿真，控制光伏并网的电压电流和谐波含量-Grid-connected inverter simulation, control photovoltaic current and voltage harmonic content Platform: |
Size: 10240 |
Author:LLL |
Hits:
Description: 电压谐波信号，利用HHT和S变换分析提取其特征，获得其高频低频特性。-Voltage harmonic signals, using HHT and S-transform analysis to extract its characteristics, access to its high-frequency low-frequency characteristics. Platform: |
Size: 1024 |
Author:gezi |
Hits:
Description: this file is about harmonic load flow in power distribution system, it calculates power loss and voltage magnitude of some harmonic at all buses of network. Platform: |
Size: 3072 |
Author:belal |
Hits:
Description: 用于生产几种常见的电能质量扰动模型。主要有1 正常电压 2 电压暂升 3 电压暂降 4电压中断 5电压震荡 6电压尖峰 7电压谐波 8谐波暂升 9谐波暂降
-Used to produce several common power quality disturbance model. Including normal voltage voltage voltage sag voltage rise temporarily interrupt voltage shock 6 voltage spike voltage harmonic harmonic harmonic swells sag. Platform: |
Size: 1024 |
Author:leo |
Hits:
Description: Elimination of Voltage Harmonic Produced by SSSC by Using Series Active Power Filter.
This paper describes the development of a series active power filter with hysteresis control, which allows
harmonics and zero-sequence voltage compensation. Here, the series active filter play an important role in
harmonic voltage cancellation produced by Static Synchronous Series Compensator SSSC when is
connected in the electrical network. The active filter controller is based on the instantaneous power theory
(p-q theory) and was simulated by using MATLAB SIMULINK. The p-q theory is introduced followed
by the presentation of some active power filters topologies. Then a brief description of the implemented solution is made, using references of software tools used for simulation and system development. The obtained results are also presented, showing the good performance of the developed active filter. Platform: |
Size: 389120 |
Author:khan |
Hits:
Search - voltage harmonic