Perhaps then we would finally begin to live, rather than being concerned with bare survival.

The film is concerned with unemployment.

这部影片是有关失业问题的。

The book is concerned with political economics.

这本书研究的是政治经济学。

The economy principle that expressway is concerned with has the advanced economy theory, expressway affect for district position economy.

高速公路涉及的经济学原理有发展经济学原理、公路发展的超前性理论、公路对区位经济影响的规律。

Relating to or concerned with the combined affairs of two administrative zones.

关于或涉及两方联合管理区域的事物的。

Double Fed Induction Generator ( DFIG) has become the mainstream generator of variable speed constant frequency wind power generation technology because its electrical safety and reliability and the converter of which could be of small capacity.

双馈感应发电机（DFIG）因其变频器容量小、安全可靠的优势，已成为变速恒频风力发电技术中的主流机型。

A disk-type PM synchronous generator which is used in the direct driven variable speed constant frequency wind energy sys-tem, is presented and its principle and electromagnetism design are analysed.

提出了一种用于直驱式变速恒频风力发电系统的盘式永磁同步发电机，对其运行原理和电磁设计进行了分析和推导。

The remote sensing equation for determining the profiles of the atmospheric temperature structure constant and wind have been derived by using the statistical characteristics of the fluctuated atmospheric microwave radiation.

推导出利用大气氧气微波辐射起伏统计特征，探测大气温度结构常数分布与风分布的遥感方程。

Because direct-drive variable speed constant frequency wind power generation system is high efficiency, simple structure and stable operation, it is one of development trends and current research focus of wind power technology.

直驱变速恒频风力发电系统由于其效率高，结构简单及稳定运行，是风力发电技术的发展的趋势和当前研究热点之一。

Direct drive permanent magnet synchronous generation system plays an important role in the variable speed constant frequency wind power generation field because of its good operation performance, high efficiency and high reliability.

直驱式永磁同步风力发电系统因其良好的运行性能、效率高与高可靠性等优点，在变速恒频发电领域占据着越来越重要的地位。

In nowadays wind power generation technology, Variable Speed Constant Frequency wind power technology and Variable Pitch Control technology become the mainstream wind power technology and has a very good prospects of development.

在现今的风力发电技术中，变速恒频风力发电技术和变浆距调节技术成为了主流的风力发电技术，具有很好的发展前景。

At present, variable speed constant frequency wind power system has become the main trend of wind power development with its obvious advantage in wind power converter system connected to grid.

目前，在风力发电并网运行的风力发电变流系统中，变速恒频风电系统以其十分明显的优势，己经成为风电发展的主要趋势。

In recent years, the variable speed constant frequency wind generator system is the most widely question for discussion at home and abroad, especially for doubly-fed induction.

变速恒频风力发电系统是近年来国内外研究最广泛的课题，其中最具代表性的是绕线式转子双馈异步发电系统。

The simulation model for the grid connection of offshore wind farm via VSC-HVDC based on the fixed pitch constant speed wind power generation system is established.

建立了基于定桨距恒速风力发电机系统的海上风电场直流并网仿真模型，并对风电场几种典型运行情况的并网性能进行了仿真分析。

Finally this article analyzed the mathematical model of wind turbine, compared to the current different types of variable speed constant frequency wind power systems.

最后分析了风力机的数学模型，对比了目前采用的不同类型的变速恒频风力发电系统。

With the development of the variable speed constant frequency wind power generation technology, double-fed wind power system has become a research focus.

随着变速恒频风力发电技术的发展，双馈型风力发电系统已经成为一个当前研究的热点。

A variable speed constant frequency wind power generation system of doubly-fed induction generator based on converter excitation was described.

建立了基于变换器励磁的双馈感应电机的变速恒频风力发电功率控制系统的模型。

Torque Ripple Control for Drive-Train in Variable Speed Constant Frequency Wind Turbines

变速恒频风力发电系统传动链转矩波动控制

Comparison and Analysis on Network Synchronization Modes of Several Kinds of Variable Speed Constant Frequency Wind Power Generator

几种适合变速恒频风力发电机并网方式对比分析

Study of Robust Rotating Speed Control Methold of Variable Speed Constant Frequency Wind Turbine System

变速恒频风力发电系统转速鲁棒控制方法研究

DTC control of doubly-fed variable speed constant frequency wind turbine

双馈变速恒频风电机组直接转矩控制