发电机

Direct-driven PMSG works at low speed and its size is generally big.

直驱永磁同步风力发电机运行转速低，一般定子外径都比较大。

Based on analysis to the principle of back-to-back converter for direct-driven variable speed constout frequency WECS,phase lock loop based sensorless control strategy was adopted to determine the speed and phase angle of PMSG,and its work principle and realization method are analyzed in detail.

在分析直驱型变速恒频风电系统背靠背变流器工作原理的基础上，采用锁相环无速度传感器控制策略对永磁同步发电机的速度和相位进行观测，对其工作原理和实现方法进行了分析。

Permanent magnet synchronous generator ; direct-driven wind energy conversion system ; sensorless control ; back-to-back converter ; phase lock loop

永磁同步发电机；直驱风电系统；无速度传感器控制；背靠背变流器；锁相环

The simulation and experimental results prove that the PLL based sensorless control can obtain accurate speed and phase angle information of PMSG,have fast response,good current control effect,and good steady-state and dynamic performances,may be used to substitute conventional encoder to control the PMSG,by further improvement especially at low speed,for direct-driven WECS.

仿真与实验结果表明，锁相环无速度传感器控制能够准确获取电机转速与角度信息，响应速度快、电流控制效果好，具有较好的稳态与动态性能，经过进一步优化，特别是提高低速段性能后，可以在直驱风电系统中替代常规编码器实现对永磁同步发电机的控制。

The Direct-Driven variable speed constant frequency wind generation system takes low speed PM generator as the generator,and it has the advantage of no gearbox,low mechanical loss,high efficiency,low maintenance cost.

直驱型变速恒频风力发电系统采用低速永磁同步发电机结构，无需齿轮箱，机械损耗小，运行效率高，维护成本低。

Basing on the theory on Space-Vector PWM, the paper describes the mapping implemented by Neural-Network from tracked voltage vector to turn-on time of IGBT about rectifying sect of direct-driven synchronous generator excited by permanent magnets convertor system.

本文针对直驱永磁风力发电机变流系统的整流部分，利用空间矢量脉宽调制的原理，利用神经网络来实现跟踪的电压矢量到整流器三相桥臂开关时间的映射。

Combined with the nonlinear characteristics of wind turbines and the control strategy of generator-side converter and grid-side converter, used the design method for digital PI regulator, the back-to-back PWM converter on the wind-power system with direct-driven permanent magnet synchronous generator was built in the simulink of the MATLAB.

结合风力机的非线性特性和机侧变换器与网侧变换器的控制策略，应用数字PI调节器参数设计方法，在MATLAB/simulink仿真环境下构建了基于背靠背变换器的永磁直驱风力发电系统，系统包括风力机、永磁同步发电机、变频器、电网及其电气控制部分的数学模型，仿真结果表明风电系统的PI调节器参数设计合理且系统具有良好的运行特性。

This paper introduces a kind of method by which we can record fault data of generator and display in figure.

摘 要：本文介绍了一种记录发电机故障数据并用波形显示出来的方法。

This ** introduces a kind of method by which we can record fault data of generator and display in figure.

摘 要：本文介绍了一种记录发电机故障数据并用波形显示出来的方法。

A mathematical model of high-voltage short distance ring power transmission lines is developed and a multiple modules coupling model of this power transmission system fit for digital real-time simulation is further presented on the basis of known models of synchronous machine and composite load.

建立了高压短距离环形电力传输线的数学模型，并在已知同步发电机与综合负载模型的基础上，进一步提出了适合于该电力传输系统数字实时仿真的多模块耦合模型，同时给出了相应的数字积分方法。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。