共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
基于无刷双馈风力发电机(BDFM)特殊的结构特点和工作原理,从转子参考轴d-q模型出发,构建BDFM在同步参考系下的数学模型。通过对控制绕组进行交流励磁,对变速恒频无刷双馈发电机的有功和无功解耦控制,最终实现最大风能的有效捕捉。 相似文献
3.
详细论述了绕线型双馈异步风力发电机变速恒频发电原理、基本工作原理以及绕线型双馈异步风力发电机在不同运行状态下的功率传递关系。 相似文献
4.
建立了可用于控制算法研究的双馈风力发电机数学模型,在确定电网电压定向矢量控制策略的基础上,提出了采用基于转子电流的模型参考自适应方法进行电机转速观测的无速度传感器控制方法。在双馈风力发电系统模拟实验平台上对控制方法进行了实验验证,结果证明了无速度传感器定向矢量控制策略的有效性。 相似文献
5.
风力发电机运行环境恶劣,在出厂之前必须模拟风场做各种负载试验。文中通过分析双馈异步风力发电机工作原理及其在变频器控制下的工作方式,介绍一种电动机—发电机组负载试验方法,这一方法具有良好的控制精度、试验效率高、设备投入少等优点,适用于发电机厂家对电机的负载试验,也适用于整机厂家对变频器的负载试验,还可以拓展到其它电机的负载试验。 相似文献
6.
7.
8.
分析了双馈发电机交流励磁变速恒频发电运行原理,给出了双馈发电机矢量控制模型,通过Matlab/Simulink仿真,证明了可实现系统输出有功功率、无功功率的独立解耦控制。 相似文献
9.
10.
11.
12.
13.
针对双馈风力发电系统低电压穿越(LVRT)中定转子过电流问题,在电网低电压故障时选择主动式转子Crowbar保护电路旁路转子变流器限制转子变流器电流.基于PSCAD/EMTDC建立了双馈风力机组的仿真模型并在电网三相对称低电压故障下进行了仿真分析,仿真结果验证了主动式转子Crowbar保护电路实现LVRT的有效性. 相似文献
14.
15.
The linear active disturbance approach is employed to deal with the load frequency control issue of a single area wind power system based on doubly fed induction generator, and the performance of the control law is optimized by using the bat-inspired algorithm. The load frequency control issue has become more challenging in a complex power system based on wind energy conversion system due to the varying feature of the wind penetration, and sustaining the balance between the power generation and demand by rejecting the internal uncertainties in the process model and the external disturbances simultaneously. In the framework of the presented linear active disturbance rejection control approach, by constructing an extended state observer, the total disturbance, including all the unmodelled dynamics in the process model and the external disturbances, can be estimated in real time and then compensated by a simple linear PD control law. The controller parameters tuning is then simplified into the optimization of the two bandwidths: observer bandwidth, and the controller bandwidth. Then, this issue can be achieved by employing the heuristic modified bat inspired algorithm based on the optimization of the proposed performance index. The effectiveness of the proposed approach is validated by the extensive simulation examples of the load frequency control issue involved in the single area power system, taking into account different wind penetration, as well as the external disturbances. The performance robustness of the proposed approach against the parameters perturbation in the process model is also demonstrated via the Monte-Carlo method. The performance superiority of the proposed approach over the conventional Proportional Integral and Fuzzy-Proportional Integral based controller even in the presence of external disturbances and uncertainty in power system parameters under different cases of high wind penetration is also validated from the simulation results. 相似文献
16.
用模糊控制的思想设计出一种模糊控制器,并用高频加热装置进行高温疲劳试验,控制结果表明这种控制器能使系统具有满意的性能指标。 相似文献
17.
针对异步电动机比直流电动机调速困难的问题,提出了异步电动机矢量变频调速的控制策略,本文介绍了异步电动机矢量控制的基本原理,并且结合实际设计出异步电机矢量变频调速系统的结构图,根据异步电机模型和在调速系统中各子系统的模型,在SIMULINK环境下对该系统进行仿真,并得出实验结果。表明SIMULINK可作为电机仿真分析中的一种方便、快捷、有效的工具。 相似文献
18.
19.
Fault ride through (FRT) capability in wind turbines to maintain the grid stability during faults has become mandatory with the increasing grid penetration of wind energy. Doubly fed induction generator based wind turbine (DFIG-WT) is the most popularly utilized type of generator but highly susceptible to the voltage disturbances in grid. Dynamic voltage restorer (DVR) based external FRT capability improvement is considered. Since DVR is capable of providing fast voltage sag mitigation during faults and can maintain the nominal operating conditions for DFIG-WT. The effectiveness of the DVR using Synchronous reference frame (SRF) control is investigated for FRT capability in DFIG-WT during both balanced and unbalanced fault conditions. The operation of DVR is confirmed using time-domain simulation in MATLAB/Simulink using 1.5 MW DFIG-WT. 相似文献
20.
为解决矢量控制方法在双馈风力发电机组中存在的对电机参数比较敏感和在扰动下控制不稳定等问题,将逆系统技术应用到双馈感应发电机(DFIG)的控制中.根据输入/输出状态方程得到了逆系统解析表达式,建立了双馈风力发电逆系统闭环控制.在计算机仿真软件Matlab上对该控制系统在电压跌落时和变速恒频时进行了仿真,仿真结果表明逆系统... 相似文献