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ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)最新文献

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Harmonic and power compensation by a flywheel system based on stator flux-oriented vector control of WRIM 基于wrm定子磁链定向矢量控制的飞轮系统谐波功率补偿
Yoo-Ho Kim, Yong-Hyun Cho, Yeou-Suk Jeong
Various sources including a DC power source generate harmonic components in the power system. As one of the approaches to compensate harmonic current generated in the power system, this paper presents a harmonic compensation system using a wound rotor induction machine (WRIM). The primary side current is controlled by excitation of the secondary side of the WRIM. In this paper, a harmonic compensation system based on flux-oriented vector control of wounded rotor induction motors is proposed. By using the flux-oriented vector control, a voltage source PWM control scheme can be applied with fast dynamic response time. The designed control scheme is verified through simulation.
包括直流电源在内的各种电源在电力系统中产生谐波分量。作为电力系统中谐波电流补偿的一种方法,本文提出了一种采用绕线转子感应电机(wrm)的谐波补偿系统。一次侧电流由WRIM的二次侧励磁控制。提出了一种基于磁链定向矢量控制的损伤转子异步电动机谐波补偿系统。采用面向磁通的矢量控制,可以实现电压源PWM控制,动态响应时间快。通过仿真验证了所设计的控制方案。
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引用次数: 0
Inter turn short-circuit fault research on generator rotor windings 发电机转子绕组匝间短路故障研究
Li Yonggang, L. Heming, Zhu Ling, Zhaozhi Hua
Based on the fault characteristics, where the exciting current increases and the output reactive power reduces, when an inter turn short-circuit occurs in rotor windings, and considering the saturated situation of generator, a fault characteristic mathematical model of inter turn short-circuits on generator rotor windings is founded. The method is verified by using the practical data.
根据转子绕组匝间短路时励磁电流增大、输出无功功率减小的故障特征,考虑发电机的饱和情况,建立了发电机转子绕组匝间短路故障特征数学模型。用实际数据对该方法进行了验证。
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引用次数: 2
Implementation of a stand-alone photovoltaic pumping system with maximum power point tracking 实现具有最大功率点跟踪的独立光伏抽水系统
Chen Kunlun, Zhao Zhengming, Yuan Liqiang
Photovoltaic (PV) pumping systems using a maximum power point tracking (MPPT) technique aim to obtain the highest possible power to the pump under various insolation and temperature conditions, thus overcoming the mismatch between the photovoltaic panel and the pumping load. A simple method of tracking the maximum power points and forcing the system to operate close to these points is presented in this paper. The MC68HC908GP32 microcontrol unit (MCU) is employed to implement the proposed MPPT controller. Experimental results show the performances of a photovoltaic pumping system with the MPPT technique.
采用最大功率点跟踪(MPPT)技术的光伏(PV)泵浦系统旨在在各种日照和温度条件下为泵浦获得尽可能高的功率,从而克服光伏板与泵浦负载之间的不匹配。本文提出了一种跟踪最大功率点并迫使系统在这些点附近运行的简单方法。采用MC68HC908GP32单片机实现MPPT控制器。实验结果表明,采用MPPT技术的光伏泵浦系统具有良好的性能。
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引用次数: 14
Microprocessor control system of brushless DC motor 无刷直流电动机微处理器控制系统
W. Xinghua, Liu Qingfu
A digital control system for a brushless DC motor using an 8031 microcontroller is described in this paper. The adoption of the bipolar PWM technique makes the motor operate in four quadrants. The proportional plus integration technique is used to adjust speed and decrease overshoot and transients. Based on the above, the dynamic performance of the system is significantly improved.
本文介绍了一种基于8031单片机的无刷直流电动机数字控制系统。采用双极PWM技术,使电机在四个象限内工作。采用比例加积分技术调节速度,减少超调量和瞬态。在此基础上,系统的动态性能得到了显著改善。
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引用次数: 0
Modelling of switched reluctance motor based on variable structure fuzzy-neural networks 基于变结构模糊神经网络的开关磁阻电机建模
Zheng Hongtao, Qiao Bin, Guo Zhijiang, Jian Jingping
Switched reluctance motors (SRM) are almost always operated within the saturation region for a very large operation region. This yields very strong nonlinearities, which makes it very difficult to derive a comprehensive mathematical model for the behavior of the machine. This paper presents the variable structure fuzzy-neural networks model of SRM. Based on the Takagi-Sugeno fuzzy-neural networks, a variable structure and step learning arithmetic was presented. Then the fuzzy-simulation results show that this method is more precise and less time-consuming for convergence than BP neural networks model.
开关磁阻电动机(SRM)在很大的工作范围内,几乎总是在饱和区域内工作。这产生了非常强的非线性,这使得很难推导出机器行为的综合数学模型。提出了SRM的变结构模糊神经网络模型。在Takagi-Sugeno模糊神经网络的基础上,提出了一种变结构步进学习算法。模糊仿真结果表明,该方法比BP神经网络模型具有更高的收敛精度和更短的收敛时间。
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引用次数: 2
The principle and design of the permanent magnet bias DC reactor 介绍了永磁偏置直流电抗器的原理和设计
Kou Baoquan, Song Liwei, Zhang Qianfan, Chen Chukang
In this paper, the authors present the principle of the permanent magnet bias DC reactor, examine the linear resolution and design of its magnet circuit, and detail experiments carried out on the reactor.
本文介绍了永磁偏置直流电抗器的工作原理,研究了其线性分辨率和磁路设计,并对电抗器进行了详细的实验。
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引用次数: 4
Analytical prediction of rotor eddy current loss in brushless machines equipped with surface-mounted permanent magnets. I. Magnetostatic field model 表面贴装永磁体无刷电机转子涡流损耗的分析预测。1 .静磁场模型
Z. Q. Zhu, K. Ng, Nigel Schofield, D. Howe
An analytical technique for predicting the rotor eddy current loss in brushless motors equipped with surface-mounted permanent magnets is described. The analytical model, formulated in polar coordinates and based on the calculation of the two-dimensional magnetostatic field in the airgap/magnet regions, enables the eddy current loss to be calculated in the permanent magnets and the retaining sleeve, if fitted, of motors having either radial or parallel magnetised magnets and either overlapping or nonoverlapping stator windings, and can cater for any specified load condition. The technique is applied to a brushless DC traction machine, in which the rotor loss is due predominantly to time harmonics in the stator armature reaction field which resulted from commutation events, and loss predictions are compared with thermometric-based measurements. Good agreement is achieved at low speeds. However, a significant discrepancy exists at high speeds, due to the neglect of the eddy current reaction field. This is accounted for in a refined analytical model described in part II.
介绍了一种预测表面贴装永磁体无刷电机转子涡流损耗的分析方法。该解析模型以极坐标表示,基于气隙/磁体区域二维静磁场的计算,可以计算具有径向或平行磁化磁体、重叠或不重叠定子绕组的电动机的永磁体和保持套中的涡流损耗,并可以满足任何指定的负载条件。该技术应用于无刷直流牵引电机,其中转子损耗主要是由于换相事件引起的定子电枢反作用场的时间谐波,并且损耗预测与基于温度的测量进行了比较。良好的协议是在低速下达成的。然而,由于忽略了涡流反应场,在高速下存在显著的差异。这在第二部分中描述的一个精细的分析模型中得到了解释。
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引用次数: 54
Parameters weighting-mean synthesis modeling to induction motor 感应电机参数加权-均值综合建模
L. Xinran, Chen Yuanxin
This article provides a modeling method of an induction motor describing aggregate electric power load, which is called "parameter weighting-mean synthesis modeling". This method is based on the identification modeling for every single load record. The essential procedure of this method is that we obtain every set of model parameters of induction motor for all corresponding load records with identification modeling respectively at first, and then get the weighting-mean parameters of all single identification modeling. Finally we use the weighting-mean parameters as equivalent model parameters of an induction motor describing the aggregate power load. The practical modeling results show that this method is very convenient to use and is simpler and more effective than the "synthesis identification modeling".
本文提出了一种描述感应电动机总电力负荷的建模方法,即“参数加权-均值综合建模”。该方法基于对每条单负荷记录的识别建模。该方法的基本步骤是首先分别通过识别建模获得感应电动机各对应负载记录的每一组模型参数,然后得到各单一识别建模的加权均值参数。最后,我们用加权平均参数作为描述总功率负荷的等效模型参数。实际建模结果表明,该方法使用方便,比“综合识别建模”更简单有效。
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引用次数: 2
Research on control strategies for high-power high-performance AC power supplies 大功率高性能交流电源控制策略研究
Lu Jialin, Xie Lihua, Su Yanmin
This paper presents a novel control scheme suitable for high-power high-performance AC power supplies. The performances of the conventional current-regulated voltage-controlled system with bipolar PWM are first analyzed in detail. The proposed control scheme incorporates a dual synchronous PWM technique of single-phase full-bridge inverter and multiple feedback loop. Thanks to this scheme, the AC power supply output voltage can maintain a high-quality sinewave at low switching frequency and small output LC filter parameters. At the same time, the system his excellent voltage regulation performance, fast dynamic response, good disturbance rejection, high nonlinear load compatibility, and small voltage modulation value. The validity of the proposed control scheme has been verified on a single-phase 30 kVA experimental prototype.
本文提出了一种适用于大功率高性能交流电源的新型控制方案。首先详细分析了传统的双极PWM稳流压控系统的性能。该控制方案结合了单相全桥逆变器和多反馈环路的双同步PWM技术。由于该方案,交流电源输出电压可以在低开关频率和小输出LC滤波器参数下保持高质量的正弦波。同时,该系统具有电压调节性能优异、动态响应快、抗扰性好、非线性负载兼容性高、电压调制值小等特点。所提控制方案的有效性已在单相30kva实验样机上得到验证。
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引用次数: 1
Numerical calculation of stator end-leakage reactance of large turbogenerator 大型汽轮发电机定子端漏抗的数值计算
L. Yanping, C. Weihua
In this paper, the method of calculating stator end-leakage reactance of large turbogenerator by quasi-3D sinusoidal magnetic field FEM is presented, and the formula of stator end-leakage reactance is derived. Taking the 600 MW turbogenerator as an example, the influence of some factors such as the eddy current in end parts and the length of stator and rotor iron core are discussed.
本文提出了用准三维正弦磁场有限元法计算大型汽轮发电机定子端漏电抗的方法,并推导了定子端漏电抗的计算公式。以600mw汽轮发电机组为例,讨论了端部涡流、定子铁芯长度等因素对机组性能的影响。
{"title":"Numerical calculation of stator end-leakage reactance of large turbogenerator","authors":"L. Yanping, C. Weihua","doi":"10.1109/ICEMS.2001.970636","DOIUrl":"https://doi.org/10.1109/ICEMS.2001.970636","url":null,"abstract":"In this paper, the method of calculating stator end-leakage reactance of large turbogenerator by quasi-3D sinusoidal magnetic field FEM is presented, and the formula of stator end-leakage reactance is derived. Taking the 600 MW turbogenerator as an example, the influence of some factors such as the eddy current in end parts and the length of stator and rotor iron core are discussed.","PeriodicalId":143007,"journal":{"name":"ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123269436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
期刊
ICEMS'2001. Proceedings of the Fifth International Conference on Electrical Machines and Systems (IEEE Cat. No.01EX501)
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