Description: 风力发电系统中PWM并网逆变器的研究，希望对大家有所帮助-Wind power generation system and network PWM inverter research, I hope all of you to help Platform: |
Size: 261120 |
Author:李曼 |
Hits:
Description: This Modbus RTU Protocl that i have written by Visual Basic to control Inverter N100 (Hyndai-Korea) and Multimeter(GE) via RS485 Network-This is Modbus RTU Protocl that i have written by Visual Basic to control Inverter N100 (Hyndai-Korea) and Multimeter(GE) via RS485 Network Platform: |
Size: 307200 |
Author:Khai |
Hits:
Description: 利用2407DSP产生的电感电流滞环控制逆变器并网一个汇编语言源程序，已经调试通过，希望对大家有帮助！-2407DSP generated using inductor current hysteresis control inverter and an assembly language source network has been through the debugging, we want to help! Platform: |
Size: 6144 |
Author:泶海奋 |
Hits:
Description: 为满足在电网发生故障时风电机组需保持与电网连接并向系统不间断供电的要求,提出
了双馈风力发电机的动态模型、变流器模型、变流器保护及电网模型,以研究双馈风力发电机的暂
态特性.以1·5MW SUT-1500双馈风力发电机为原型,由一个无穷大电源等效电网模型,变流器模
型采用定子磁链的定向电流矢量控制方法,利用PSCAD软件对双馈电机的暂态特性进行仿真.仿
真结果表明,矢量控制能够实现双馈电机的有功、无功解耦,并可改善系统的低压穿越能力.
-To meet the power failure to keep their wind turbine grid-connected uninterruptible power supply to the system requirements, proposed doubly-fed wind turbine dynamic models of converter model, inverter protection and network model to Study of double-fed wind generator transient characteristics. to 1.5 MW SUT-1500 double-fed wind turbine prototypes, by an infinite power grid equivalent model of converter model uses the stator flux orientation of current vector control methods, using PSCAD software to double-fed motor simulation of transient characteristics. The simulation results show that vector control can be achieved double-fed motor active and reactive decoupling, and can improve the system through the capacity of low-voltage. Platform: |
Size: 619520 |
Author:mengxianghua |
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: 一篇关于逆变器的论文 优化高电压IGBT造就高效率太阳能逆变器 -A paper on the optimization of inverter high voltage IGBT inverter to create high-efficiency solar Platform: |
Size: 271360 |
Author:ky |
Hits:
Description: 《Z源逆变器光伏并网系统模型及电路参数设计》
摘要：建立了Z 源逆变器光伏并网系统的小信号模型，定量分析了光伏模块输出电压动态性能与主电路各参数间的
关系。光伏模块输出电压的最大功率点跟踪（MPPT）控制与系统采样平均周期关系密切，而采样平均周期又受主电路
无源元件参数大小的影响。定量分析小信号模型建立了各部分之间的传递函数，这对选择MPPT 控制采样平均周期
和主电路参数优化设计起到了关键性指导作用。实验证明了理论分析的正确性和该模型的实用性。
关键词：逆变器/ 分布式发电； 光伏模块； 最大功率点跟踪； 小信号建模-Modeling of Z-source Inverter Photovoltaic System and its Main Circuit Design
TIAN Guo-sheng1， TIAN Yan-bing2， DING Xin-ping2， ZHANG Min2
（1.Liaoning Technical University， Huludao 125105， China； 2.Qingdao Technological University， Qingdao 266520， China）
Abstract：This paper focus on the small-signal modeling of the Z-source inverter （ZSI） photovoltaic generation system and
its main circuit design.The small-signal modeling of ZSI photovoltaic generation system is set up，and the transfer functions
of the input voltage-to-shoot-through duty cycle and capacitor voltage-to-control are analyzed.The sample average period
plays an important role in photovoltaic generation maximum power point tracking （MPPT） control，while it is influenced by
main circuit parameters including input capacitor，Z-source network capacitors and inductors.Thus，the quantitative
analysis in those parameters is the design guideline for the main circuit and sample average period.The experiment carried
on prototype Platform: |
Size: 212992 |
Author:赵刚 |
Hits:
Description: 该仿真模型是一种利用模糊控制器调节PWM信号占空比的异步电动机直接转矩控制的策略，即在传统异步电动机直接转矩控制的基础上，用模糊控制器代替传统DTC中的滞环比较器和空间电压矢量状态选择器来细分控制规则，最后控制逆变器的开关，以减小转矩和磁链脉动，从而改善交流异步电机伺服系统的动、静态品质，使整个系统具有较强的鲁棒性和自适应性。-A method of the stator resistance estimate which based on the fuzzy neural network was proposed and the motor speed is estimated by MRAS speed identification algorithm based on the stator voltage and the current that can be easily detected. Besides, a new design of fuzzy direct torque control system of induction motor was introduced in this paper, which based on strategy of modulating the duty cycle to decrease the torque and stator flux ripple. This design uses fuzzy control block to instead of the traditional space voltage vector selector to control the inverter switch which can improve the static and dynamic performances of AC asynchronous motors, which make the whole control system have strong robustness. Platform: |
Size: 14336 |
Author:王晨 |
Hits:
Description: 单相逆变器并网控制和有源频率偏移孤岛检测-Single-phase inverter and network control and active islanding detection of frequency offset Platform: |
Size: 84992 |
Author:陈一帆 |
Hits:
Description: 分析了电压型控制模式下的逆变器并网的电路结构和数学模型，提出了基于重复控制技术的光伏逆变器并网控制策略，仿真和实验结果表明方案满足逆变器并网要求。-Voltage control mode inverter grid circuit structure and mathematical model is proposed based on repetitive control technology photovoltaic inverter grid control strategy, simulation and experimental results show that the program inverter to meet and network requirements. Platform: |
Size: 209920 |
Author:chenchen |
Hits:
Description: saber仿真模型 主要功能实现了spwm的并网仿真-saber main function of simulation models and network simulation spwm Platform: |
Size: 6144 |
Author:king |
Hits:
Description: A Robust design of integrating PV farm to the grid using Z source network and excluding the need for MPPT & DC control equipment. Platform: |
Size: 1139712 |
Author:Usman |
Hits:
Description: 为保障安全与电力用户供电质量，基于并网逆变器的分布式发电(distributed generation DG)系统要求具备孤岛检测功能。针对被动式孤岛检测法检测盲区(non-detectionzone，NDZ)大、检测时间长以及主动式孤岛检测法影响分布式发电系统供电质量的缺点，提出了一种新的被动式孤岛检测方法。该方法利用小波变换从公共耦合点(point ofcommon coupling，PCC)处的电压信号及逆变器输出电流信号中提取特征量，再通过BP 神经网络进行模式识别来判断是否出现孤岛现象。仿真与实验结果表明，该方法比传统的被动式孤岛检测方法检测速度快，检测盲区小。同时，由于所提供的孤岛检测法没有向控制信号中加入扰动量，因而不会对电能质量产生不良影响，克服了主动式孤岛检测方法的不足，并具有很高的准确性与可靠性。-The function of islanding detection is required for the grid-connected inverter-based distributed generation system due to safety reasons and to maintain the quality of power supply. Passive methods have a large non detection zoneand the detecting time is long, while active schemes have negative influence on power quality, so a novel passive islanding detection method was proposed. In this method, wavelet transform was adopted to extract feature vectors the voltage of point of common coupling (PCC) point and the output current of inverter, and then pattern recognition was exerted by BP neural network to determine whether there was an island phenomenon. The simulation and experiment results show that this method is faster than the traditional passive methods in islanding detection, and the non-detection zone is smaller. At the same time, because no disturbance was added to the control signal in the method, there isn’t a negative impact on power quality. The method overcomes the shortco Platform: |
Size: 609280 |
Author:kiel |
Hits:
Description: 本程序为三相三线制20kw光伏并网逆变器程序，可实现光伏电池最大功率点跟踪，并网功率因数0.99以上-This procedure for the three-phase three-wire 20kw photovoltaic grid-connected inverter program, can achieve the maximum power point tracking photovoltaic cells, and network power factor of 0.99 or more Platform: |
Size: 394240 |
Author:潘建 |
Hits:
Search - network inverter