This paper builds the model of DFIG, studies the LVRT capability, analyzes the facts affecting the LVRT capability by MATLAB/ SIMULINK simulation, and discusses the ways to improve it.

With the proportion increasing of wind power generation in power grid, the power grid demand for increasingly high to wind turbine. Low-voltage through technology ( LVRT) is one important indicator.

随着风力发电在电网中的比例日益增加，电网对风电机组的要求也越来越高，低电压穿越技术（LVRT）就是其中一项重要指标。

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So the grid department proposed the LVRT ( Low Voltage Ride Through) requirement of wind turbine to keep the stability and safety of grid system in this condition.

因此，在这种情况下，为了维护电力系统运行的稳定性和安全性，电网部门提出了风力发电机组的低电压穿越要求。

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Finally, the paper introduces a new method to increase the LVRT of wind turbines by means of series dynamic braking resistors.

最后提出了利用串联制动电阻来提高风电机组的LVRT能力的新方法。

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Currently, the new power grid rules require that wind turbines have low voltage ride through ( LVRT) capacity. When the short-circuit fault occurs, wind turbine not only can grid-connected operation, but also can provide a certain reactive power.

目前，新的电网规则均要求并网风电机组具有一定的低电压穿越能力，当电网发生严重短路故障时，并网风电机组能够不脱网运行，同时可以向电网提供一定的无功功率。

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With the rapid development of wind power generation, wind power makes up a more and more important part in the power system, LVRT ( low voltage ride-through) is increasingly concerned and studied.

随着风电场的迅速增加，风电功率在电力系统中所占比重越来越大，风电场低电压穿越问题也越来越被广泛的关注和研究。

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To prevent all turbines disconnection from inducing power impulse to the grid, it is a necessary demand that on-grid wind power generator must possess low voltage ride through ( LVRT) capability.

为防止风电场的脱网对电网造成严重的电力冲击，要求风力发电机组具备一定的低电压穿越能力。

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The LVRT control principle, control model and control strategy of DFIG and D-PMSG are investigated. ( 4) The action time of the rotor crowbar and the dc-link capacitance capacity of DFIG are studied.

通过仿真计算，研究了双馈风电机组低电压保护动作时间对机组本身和风电场运行的影响及直流环节电容容量对限制过电压的影响。

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WMN QoS routing strategy based on interference model

基于干扰模型的无线网状网QoS路由策略

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Wireless mesh network ( WMN) has received continuous attention in recent years.

近年来，无线Mesh网络已成为一个倍受关注的研究领域。

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P2P Super Node Selection Strategy Based on Physical Characteristic of WMN

基于WMN物理特性的P2P超级节点选取机制

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When you access the browser's window and document objects from JSNI, you must reference them as$ wnd and$ doc, respectively.

当从JSNI访问浏览器窗口和文档对象时，必须将其分别作为$wnd和$doc加以引用。

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Objectice: To detect the mutation and polymorphism in exon 18 in Chinese Wilson's disease gene ( WND).

目的：检测中国人Wilson病（WD）基因的第18外显子（exon18）突变及多态。

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GWT provides the$ wnd and$ doc variables to refer to the window and document objects.

GWT提供了$wnd和$doc变量，它们分别代表窗口和文档对象。

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This function is part of the control's library and as an external resource, it must be prefixed with$ wnd.

此函数是控件库的一部分并可作为外部资源，它必须以$wnd为前缀。

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Study on the Impact of the Organic DCS Simulacrum to Characteristics of Wet Wnd Chemistry

有机DCS模拟物对造纸湿部化学特性的影响研究

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An analysis wnd study of computerized managerial system in library's gathering materials for books and periodicals

图书馆书刊采访计算机管理系统的分析与研究

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This essay analyzes the state and features of the WND and comparison between WND and SND. Then, we explore possible means of the SND further development.

本文通过对无锡新区发展现状及特点，特别是无锡新区与苏州新区的比较研究，探讨了无锡新区进一步发展的对策。

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On the basis of the imported risk assessment system for foreign animal infectious diseases, using integrate assessment factors to estimate the WNF risk of all counties in China.

以动物外来传染病输入风险评估体系为基础，对多种风险因素综合评估，分析我国各县市西尼罗河热发生的风险情况。

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Finally, the author conducts a positive analysis to verify the practicability and maneuverability of the WNG mode of interior decoration project schedule and control.

最后应用室内装饰工程项目进度计划与控制WNG管理模式进行实证分析，验证该管理模式的实用性与可操作性。

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Results: WNM can inhibit the spontaneous movement of isolated intestine of rabbits and antagonize the spasm of isolated intestine induced by acecoline, barium chloride, histamine.

结果：胃宁合剂能抑制家兔离体肠管自发活动和拮抗氯化乙酰胆碱、氯化钡、组织胺所致动物离体肠管痉挛性收缩。

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