以两并联三相脉宽调制(PWM)整流器为研究对象，建立了系统的数学模型，详细分析了系统参数对零序环流的影响，设计了两并联三相PWM整流器的环流、均流双闭环控制系统，提出了一种调零矢量空间矢量脉宽调制(SVPWM)环流抑制策略，并设计了一种基于最小拍算法的零序环流抑制器，通过对零矢量的实时调节实现系统环流的抑制。电流内环采用电流解耦前馈控制策略，实现了单位功率因数，电压外环采用公共电压PI调节器实现均流控制，并联模块间不需要通信，控制简单、可靠。仿真与实验结果表明：最小拍环流抑制器能有效地抑制环流，所设计的控制方案消除了电感参数不一致对两并联三相PWM整流器的影响，实现了环流、均流控制。
2022-03-13 09:39:37
2.81MB
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循环码matlab中编程代码KoopmanMPC_for_flowcontrol
该项目在H.
Arbabi，M。Korda和I.
Mezic（）撰写的论文“非线性流动的数据驱动的Koopman模型预测控制框架”之后，演示了Koopman-MPC框架在流量控制中的应用。
下图总结了Koopman-MPC框架：
根文件夹中的文件：
汉堡的例子
按照本文中的说明运行Burgers示例，它包括数据收集，用于标识Koopman线性系统的扩展动态模式分解（EDMD），以及从某个初始条件开始的闭环控制系统。
随意使用代码的参数，特别是尝试不同的可观察对象，嵌入尺寸，参考信号，初始条件等。带有初始参数设置的整个程序在2分钟内即可在我的个人笔记本电脑上运行。
腔体示例
运行本文中介绍的盖驱动腔流动示例，包括用于识别Koopman线性系统的EDMD，以及在极限循环上从某些初始条件运行的闭环控制系统。
运行此代码有两种选择：1-要求代码为EDMD生成数据。
这是一个漫长的过程，对于白皮书中报告的参数值，在功能强大的台式机上（无并行化）大约需要10个小时，或者2-转到并下载数据文件“
Cavity_data
2022-02-25 15:27:14
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ABSTRACT —— Unbalanced grid voltage sags are the severe challenge for wind power generation system which connected to the grid successfully. The dc bus voltage and output power will fluctuate under unbalanced grid voltage. Moreover, the voltage sags will lead to the increase of peak current, which will bring potential safety hazards to the operation of wind power system. This paper proposes a simple current limiting control scheme without auxiliary equipment, which based on the detailed analysis of the excessive peak current. In this scheme, the machine side converter (MSC) controller adjusts the electromagnetic power according to the power transmitted to the grid by the grid side converter (GSC). Meanwhile, it converts the unbalanced power on the dc-link into the rotor kinetic energy, avoiding the dc-link overvoltage. The GSC controller can not only ensure that the three-phase inverter currents are in the maximum safe range that the converters can bear, but also provide reactive power support for the grid. Furthermore, the fluctuations on dc bus voltage and output power can be eliminated effectively by using the GSC controller. The feasibility of the proposed scheme and the superiority over the traditional control schemes have been verified by simulations under different types of unbalanced voltage.
2021-08-26 14:08:20
2.76MB
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