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.

ABSTRACT Due to the power-grid low-order harmonic voltage and the nonlinearity of power electronic devices, the grid-connected converter of wind power generation system produces grid-connected harmonic current. In order to improve the output power quality of full-power grid-connected converter of wind power generation system, based on the detailed analysis of the harmonic mathematical model of grid-side converter, a cross-coupling control strategy for suppressing the low-order harmonic current components is proposed in this paper. In this control strategy, the DC component of each grid-connected harmonic current is detected in the multi-synchronous rotating coordinate system, and the current cross-coupling control method is adopted to realize the accurate control of each harmonic current. The harmonic current cross-coupling controller is analyzed and designed in detail. The proposed control strategy takes into account the cross-coupling effect of each harmonic current, which can effectively reduce the interaction between each harmonic current and the fundamental current, and improve the stability of the system. Simulation and experimental test verify the correctness and feasibility of the proposed control strategy.

行业-电子政务-主电机直驱式立式吸尘器滚刷结构.zip

行业分类-设备装置-旁路卸荷电磁直驱的剪叉式高空作业平台液压控制系统.zip

引用的第三方SSD1306库驱动都是申请1KB芯片内存做为显示缓冲，这样在不添加其它功能代码情况下编译就占用50%的内存空间。百试不爽，只好用现成驱动封装一个不申请空间的SSD1306库了。中英文混合显示。 #include "OLED.h" OLED oled; void setup(void){ Serial.begin(9600); oled.Init(); oled.Clear(); oled.ShowString(88, 0, 12, "POWER", 1); oled.ShowString(88, 1, 12, "20.4V", 1); oled.ShowCHinese(0, 0, "95%", 1); oled.ShowCHinese(28, 0, "{||||}", 1); //功率条显示 oled.ShowString(88, 2, 12, "T:05M", 1); oled.ShowString(88, 4, 16, " ", 0); //空白符填充 oled.ShowNum(94, 4, 328, 3, 16, 0); //设置温度显示 oled.ShowString(119, 4, 16, "`", 0); //小温度圈 oled.ShowCHinese(96, 6, "箭 ", 1); //oled.Pixel(100, 60); } void loop(void){ for (u16 i = 0; i < 255; i++) { //oled.BrigControl(i); //屏幕亮度设置 oled.ShowNum48(0, 3, i, 3, 1); oled.ShowCHinese(72, 3, "圈", 1); //大温度圈 oled.ShowString(118, 6, 16, "~", 1); //加热点 oled.ShowCHinese(28, 0, "{||} ", 1); //功率条显示 oled.ShowCHinese(0, 0, "65", 1); delay(10); oled.ShowString(118, 6, 16, " ", 1); oled.ShowCHinese(28, 0, "{|||} ", 1); //功率条显示 oled.ShowCHinese(0, 0, "80", 1); delay(10); } }

主要从控制参数安全域的角度研究了锁相环(PLL)控制对并网永磁直驱风机(PMSG)次同步振荡稳定性的影响。基于所建立的全系统动态互联模型，通过特征值分析方法计算得到了PLL控制参数安全域。研究发现，参数安全域中出现的一系列“峰值点”主要是由模式谐振诱发的PLL与电压源型换流器(VSC)之间的强动态交互作用引起的，并通过非线性仿真验证了模式分析所得结论的正确性。进一步地，从PLL参数安全域的角度详细筛查了模式谐振诱发PMSG次同步振荡失稳的机理，分析了系统参数和VSC控制参数这2个因素对风电并网次同步振荡特性的影响。

基于Matlab_Simulink的永磁直驱风力发电机组建模和仿真研究.pdf

通过建立永磁风力发电系统的数学模型,采用控制策略控制变流器工作,使其输出稳定的交流电,并采用MATLAB建模仿真实现,验证了模型的正确性和有效性,对控制策略的研究具有很大的现实意义。

ACS运动控制器和第三方电机配置PID增益调试，电机添加、反馈设置、SPiiPlus MMI Application Studio 软件使用

这个 觉得值得拥有 压缩包里面有风力发电中的惊喜 这个 觉得值得拥有 压缩包里面有风力发电中的惊喜 这个 觉得值得拥有 压缩包里面有风力发电中的惊喜 这个 觉得值得拥有 压缩包里面有风力发电中的惊喜