2MW风力发电机设计研究中英文.doc

郑州工业应用技术学院学生课程考核专业外文翻译原 文：Design Study of Doubly-Fed Induction Generators for a 2MW Wind Turbine 译 文： 2MW风力双馈异步电动机的研究设计 学 院： 机电工程学院 专 业： 12级电气工程及其自动化 班 级： 一 班 课 程： 电气工程专业英语 学生姓名： 向 雷 学 号： 1 2 0 2 1 2 0 1 1 8 时 间： 2015年12月21日 成绩评定： Design Study of Doubly-Fed Induction Generators for a 2MW Wind Turbine1. INTRODUCTION For wind turbines, especially those who have a many megawatts of fan motor rated power, they are both popular and environmental protection, can also use fossil fuels. Legislation to encourage the reduction with carbon, so the wind motor is of great potential for development of renewable energy in the world.Wind turbines are viewed as a well established technology that has developed from fixed speed wind turbines to the now popular variable speed technology based on doubly-fed induction generators (DFIGs). A DFIG wind turbine is variable speed with the rotor converter being controlled so that the rotor voltage phase and magnitude is adjusted to maintain the optimum torque and the necessary stator power factor 1, 2, 3. DFIG technology is currently well developed and is commonly used in wind turbines. The stator of a DFIG is directly connected to the grid with a power electronic rotor converter utilised between the rotor winding and the grid. The variable speed range is proportional to the rating of the rotor converter and so by limiting the speed range to 30% 4, 5, 6, 7 the rotor converter need only be rated for 30% of the total DFIG power whilst enabling full control over the full generator output power. This can result in significant cost savings for the rotor converter 4. The slip ring connection to the rotor winding however must be maintained for reliable performance.2. CONNECTION METHODS The grid side inverter (GSI) is controlled to maintain a fixed dc link voltage with a given power factor at the grid. The rotor side inverter (RSI) is controlled so the maximum energy is extracted from the kinetic energy of the wind whilst enabling the stator power factor to be controlled within the limits of the grid requirements though unity power factor is often desirable.3. CONTROLLER PERFORMANCEClosed-loop control method are discussed and IG model DF the preparatory work 12 but only a 750 million kw laboratory test platform. 2 kw dynamics system will be different, discussed in this paper. Dynamic controller performance and IG model for DF is shown in this period of 2 MW wind turbine.3.1. DFIG Mode (T and Q Control)The reference value of torque mode controller DF and stator reactive power to the grid code requirements 11. In this paper, we study the two kinds of speed, bring out part of the control performance of the two above and below the nominal power of the 20% limit of specification requirements of the grid. A named can reach 300 million kw, around 1150 RPM (less than 20% of the nominal power).A rated power is 125 kw 125 RPM (more than 20% of the rated power). Reference and the actual stator reactive power, torque, Qs, are shown.Reference torque, the rich, because both are the name of the specific torque speed calculated for a given speed, speed and - 7701 nm - 2672 nm to 1150 of the 1550 revolution. 200 nautical miles on both sides of the dynamic response speed, the step, change the torque. Reference the stator reactive power, Qs *, the screw rotation speed change between the range of specified 1150 grid code requirements; First - the generation and goes further, 5% at t = + 5% in 3.5 s to produce electric power. The stator power factor, PFS * in 1550, the original 0.95 and gradually change in t = 3 s unity PFS and the last step, lag in t = 0.95 4 s PFS). Vector control loop is adjusted for a time constant of 0.1 seconds, 0.9 s and Qs cycle. Vector control is designed to have a slower bandwidth than the current regulations.4. THE ROTOR VOLTAGE COMPONENTSBoth performance and IG model DF has been in the last section. Both are based on the current internal control and external control loop for the torque and the case of the stator reactive power loss and torque and stator flux linkage of IG. Combined with PI controller decoupling equation, the influence of cross coupling between reduce production cycle. The last part of the work to contribute to the research of the steady state components of the rotor voltage, all in equation (1 and 2), 2 kw machine to assess the importance of the different speed equation decoupling. The rotor voltage, tools, rotor current and the irs, among all the tools and components by the equation (1 and 2) the DF speed range (1000 to 1950, torque), and the stator power factor behind, PFS, range of 0.9 to 0.9%. Only PFS is regarded as GSI may maintain the unity of phenol.In the steady state change directly, irds, orthogonal, irqs, rotor current components of the velocity and Qs. Irds elements and regulating the stator without the power factor, by controlling the Qs and too little s components to adjust. Irds can determine the ratio of the value of providing generator reactive power of stator and rotor circuits. Irds to increase the proportion of more and more active in the rotor circuit Q while reducing the Q from export to Q statically determinate. Increasingly ask from negative irds increases, reducing the rotor circuit of the stator side, until the rotor Q is exports. Qs with Te maintain ideal, therefore irds components without PFS at a higher speed will last. Generally is constant irqs components of constant speed constant torque force, positive for the positioning frame and the size of the direct and quadrature axis alignment irs is rated for all internal conditions.The rest of this section shows the rotor voltage, VRDQS, steady state components from the equation (1 and 2). The Rrsirds terms and terms VRDS Rrsirqs VRQS merely irdqs, after climbing through, so dont show.The jsfirqs term contributes to vrds and sfirds forms part of vrqs. The sfirds component varies with both speed and stator reactive power as stator reactive power is proportional to torque for a given stator power factor. The sfirds component increases with speed as the load torque increases,figure 1. The sfirqs component is the dominant term in the vrds component, eqn (1), at non-synchronous speeds; the polarity is a result of sf and the magnitude is defined by the torque. The magnitude is irdqs scaled by slip frequency, sf, and the total leakage inductance, .Figure 12 shows the j(Lm/Ls)sfsdq component of vrdqs. The (Lm/Ls)sfsq term contributes to vrds; the term is approximately zero due to the orientation frame. The (Lm/Ls)sfsd term dominates the vrqs component. The shape of the (Lm/Ls)sfsd component is clearly influenced by sf.5. DISCUSSIONThe analysis shows that the VRDS and VRQS component predominates. VRDS in lambda sq make steady state yes Rrsirds VRDS components - sigma omega sfirqs proposed was ignored for a long time, the influence of three different areas, tries to identify, steady-state VRQS component is dominated by lambda sd term is confirmed by Hopfensperger (synchronous speed when abnormal state of stable long-term dependence on VRQS Rrsirqs). Transient response IRQ * and give priority to in order to further VRQS p sigma irqs is within one IRQ changes, The original is high. The p (LM/LS) lambda sq has a negligible effect for a long time, and lambda sq close to zero, VRDS VRQS IRQ * step steady long-term value change.6. CONCLUSIONSIn this paper, we study the 2 mw doubly-fed wind turbine DF and IG mode connection of the response of the controller, to provide parameters for 2 mw machine machine, commercial WRIM turbines used for wind turbine manufacturers. 2 mw turbine used in the work parameters not pure is a 7.5 kw machine work before the linear scaling of different, the analysis of the two areas MWDFIG. The Existing simulation model was also used to assess the 2 mw doubly-fed DF and IG mode of controllable and steady state and transient behaviors were investigated.Results show that the hollow mode is a kind of controllable operation mode, it will extend the low speed running time, the rotor voltage drop (reduced speed) of the IGBT voltage limit mechanical and electrical flow has significant applications and the limitation of the power conversion. DF mode for 2 mw doubly-fed motor rotor voltage composition were investigated. The result also shows that the speed of the importance of different performance doubly-fed decoupling equation.2MW风力双馈异步电动机的研究设计1、介绍持续风力涡轮机，尤其是那些拥有一个额定功率的许多兆瓦的风机电机，它们既流行又环保，也可以用化石燃料。立法鼓励减少地方用碳，所以风力电机目前是世界上极有发展潜力的可再生能源。风力涡轮机被看作是一种建立完善的技术，已形成从定速风力涡轮机，现在流行的调速技术基于双馈异步发电机(DFIGs)风力是一DFIG变速与转子变频器控制使转子电压相位和大小调整以保持最佳扭矩和必要的定子功率因数文13。DFIG技术是目前发达，是常用的风力涡轮机。定子的DFIG是直接连接到网格与电力电子转子变换器之间，用以转子绕组的网格。这个变量速度范围是成正比的评级的转子等通过变频器调速范围30%4、5、6、7转子转换器只需要的DFIG总量的30%的力量而使全面控制完整的发电机输出功率。这可能导致显著的成本节省了转子转换器4。 滑动环连接，但必须保持转子绕组，性能安全可靠。电源发电机速度特性，如图1所示2 MWwind汽轮机。对于一个商业发电机速度随风速，然而这种关系是为某一特定地点。作为风速，并因此机速度快、输出功率下降了的风力发电机减少直至关闭时提取风是比损失的发电机和液力变矩器。操作模式已经提出，风力机制造商宣称延伸速度范围以便在较低的速度力量提取的风是比损失在系统等系统能保持联系。这个建议标准的双(DF)连接在正常使用调速范围所谓DF异步发电机(“模式是用来延长低速运行。先前的工作已经显示了IG模式能够运作的DFIG滑到80%8。这一变化在运行时实现定子从电网DF模式，然后短巡回定子使国际组操作。所有的发电机组转子变频器在流经IG模式。免疫球蛋白曲线相同的曲线为30% DF滑动。估计国际组电力提取的风在低速下所获得的曲线，推断DF模式。参考扭矩由控制器(DF和IG模式)，就可以很容易地来源于这样的曲线。扭矩-速度数据可以存储在一个查表所以参考转矩和转速变化自动。2、连接方法电网侧逆变器控制(GSI)保持一个固定的直流环节电压与给定功率因数在网格(在我们的例子中统一)。转子侧逆变器控制(RSI)所以最大能量提取从风的动能而使定子功率因数控制范围内网格的要求虽然统一功率因数通常是可取的。3、控制器性能闭环控制方式都和IG模式DF讨论的前期准备工作12但只有一个7.5亿千瓦实验室试验平台。2千瓦动力学系统会有所不同，本文讨论了。动态控制器的性能和IG模式为DF中显示的是这段2 MW风力涡轮机。3.1DFIG模式(T和Q控制)参考价值的扭矩模式控制器DF和定子无功使网格代码要求达到11。摘要研究了两种速度，使部分的控制性能表现出两上方和下方的标称功率的20%限制电网的规范要求。一个命名可以达到3亿千瓦，约1150转(小于标称功率的20%)。一个额定功率是达到125千瓦1550转(超过20%的额定功率)。参考和实际的扭矩、定子无功功率，Qs，都显示。参考扭矩，越富有，因为这两者都是具体的名义转矩速度对于一个给定的速度计算出，2672海里为1150转速和7701海里的1550转速。200海里的速度在双方的动态响应，说明了一步，改变扭矩。参考定子无功功率，Qs *，螺杆转速变化之间的1150年所指定的范围栅格规程的要求;最初5%的生成与更进了一步，在t = + 5%的3.5s产生电力。在1550转定子动力因素、pfs *，最初0.95并逐步改变在t = 3s团结pfs和最后一步，在t = 0.95滞后4s pfs)。矢量控制回路的调整为一个时间常数的0.9s 0.1秒，为特和Qs循环。矢量控制的设计是为了有一个较慢的带宽比当前的规定。4、转子的电压元件双方的性能和IG模式DF已经在上一节。两者都是基于内部控制电流环和外部控制回路为转矩和定子无功功率损耗的案例和转矩和定子磁链的IG。再加上解耦方程的PI控制器的影响，降低产量之间的交叉耦合循环。最后一部分工作的研究做出贡献的稳态组件的转子电压，全部在方程式(1和2)，2千瓦机器来评估的重要性，在不同的速度方程式解耦。转子电压、工具、转子电流、国税局，居于万物的工具和组件由方程式(1和2)进行了DF转速范围内(1000年到1950年转矩确定)，和定子动力因素、pfs、范围的0.9落后领先到0.9%。只有pfs被视为GSI可能保持团结酚醛风轮变频器连接到网格的独立的劳损。在稳态变化直接，irds、正交、irqs、转子电流部件对速度和Qs。irds元件的功率因数、调节定子无，通过控制Qs和太少s组件调