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傅氏算法

傅氏算法的相关文献在1992年到2020年内共计90篇,主要集中在电工技术、无线电电子学、电信技术、自动化技术、计算机技术 等领域,其中期刊论文75篇、会议论文11篇、专利文献66381篇;相关期刊51种,包括中国电子商务、沈阳大学学报、江西科学等; 相关会议10种,包括中国电机工程学会电力系统专业委员会2012年学术年会、中国电机工程学会第十届青年学术会议、2008年家用自动控制器技术国际研讨会等;傅氏算法的相关文献由220位作者贡献,包括何奔腾、王文雄、侯明等。

傅氏算法—发文量

期刊论文>

论文:75 占比:0.11%

会议论文>

论文:11 占比:0.02%

专利文献>

论文:66381 占比:99.87%

总计:66467篇

傅氏算法—发文趋势图

傅氏算法

-研究学者

  • 何奔腾
  • 王文雄
  • 侯明
  • 兰金波
  • 刘富永
  • 刘洋
  • 向龙瑞
  • 吴正国
  • 周雪松
  • 夏立
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 李菁; 郑涛; 赵裕童; 魏旭辉; 王增平; 刘辉; 陈璨; 吴林林
    • 摘要: The short-circuit current characteristic of doubly-fed wind turbine is different from traditional synchronous motor,which brings new problems to algorithms and principles of protection.The deviation expression of the full-wave Fourier algorithm caused by speed frequency components is deduced,and the impact of double-fed wind turbines short circuit current on the full-wave Fourier algorithm is analyzed.Then simulation demonstrates the correctness of theoretical analysis.Meanwhile considering that wind farms are generally weak fed,for distance protection,taking into account different types of ground faults and different value of transition resistance,measured impedance of distance protection of wind farm feeders is calculated and verified by simulation using the DIgSILENT software.The impact of speed frequency short-circuit and weak fed character of doubly-fed wind farm on distance relay are analyzed and the pattern of measured impedance of distance relay varying with the speed frequency current is revealed.The conclusion can provide reference for the protection and configuration of wind power connect-in system.%双馈风电机组短路电流特性不同于传统同步电机,给继电保护算法和原理带来新的问题.解析推导了转速频率分量使全周傅里叶算法产生计算偏差的表达式,进一步分析了双馈型风电机组短路电流对全周傅里叶算法的影响,并通过仿真论证了理论解析的正确性.同时考虑到风电场一般具有较强的弱馈性,以距离保护为例,考虑不同类型接地故障并计及过渡电阻,对风电场侧送出线距离保护测量阻抗进行了机理分析,并辅以DIgSILENT仿真验证,分析了双馈风电短路电流中的转速频率分量以及风电场弱馈特性对送出线距离保护的影响,揭示了转速频率分量对于距离保护测量阻抗的影响规律.所得结论可为风电接入系统的保护与配置提供参考.
    • 张元军; 马东
    • 摘要: 本文阐述了电力系统微机保护的发展现状、傅氏算法在电力系统保护当中的意义及应用,利用MATLAB软件对传统的傅氏算法及改进的傅氏算法进行编程仿真,对两种算法频谱图进行比较分析,证明此改进算法能够正确滤除掉衰减直流分量,并有效减少了衰减直流分量对全波傅氏算法计算精度的影响.本文验证了改进傅氏算法的实际应用价值,该算法可以大大地提高电力系统微机保护对故障信号的判断效果,提高微机保护正确动作率.本文对各种改进算法的仿真研究结果,对微机保护的研制开发有较大的借鉴意义.
    • 陈婷
    • 摘要: 随着经济的快速发展和人们生活水平的不断提升,人们生产生活对电力系统稳定性和可靠性的依赖性逐渐增强,所以电力系统继电保护越来越受到关注,本文为对电力系统继电保护产生更加全面的认识,推动其整体水平的提升,将傅氏算法应用于电力系统继电保护中,通过对傅氏算法基本原理、电力系统继电保护中的傅氏算法进行系统研究,结合实例对傅氏算法在电力系统继电保护中应用的作用展开探讨。
    • 郑爽; 熊进飞; 江启文; 李怡琴
    • 摘要: 在Matlab仿真平台的基础上,针对输电线路的的继电保护,选取了三段电流保护,利用相间电流差突变量判据避免了因系统震荡和频率波动而引起的误动.利用傅氏算法准确地求出基频分量,滤除各种整次谐波和纯直流分量,极大提高了检测电流的精度.为了模拟系统供电的可靠性,引入重合闸,排除瞬时性故障对系统供电的影响,验证了在瞬时性和永久性故障下,保护的正确反应.
    • 汤馥源; 宋仲康; 杨芬娜; 杨义强
    • 摘要: 利用EMTDC/PSCAD和Matlab进行仿真实验后发现,受电容式电压互感器( CVT )暂态影响,采用传统傅氏算法,发生反方向出口故障时距离保护可能会发生超越现象,而发生正方向出口故障时保护会延迟动作,对距离保护超越的原因进行定量分析后,提出了利用改进半波傅氏算法配合提高低压距离继电器门槛值或扩大小矩形动作区范围的改进方案,解决了CVT暂态引起的距离保护超越问题,并通过仿真验证了该方案的可行性。%EMTDC/PSCAD and MATLAB simulation experiment shows that using the traditional Fourier algorithm , when op-posite direction export fault occurred , CVT transient may cause the phenomenon of distance protection overreach .When positive direction export fault occurred , CVT transient may cause the delay action of distance protection .With analysis of the reason for distance protection overreach , an improvement method was put forward for increasing the action threshold of distance protection or expanding the protection range of small rectangular with an improved half -wave Fourier algorithm .The problem of transient over-reach was solved .And the feasibility of this method was verified .
    • 吴梓亮; 李银红; 李明; 李婧靓
    • 摘要: 基于相角差的传统傅氏测频算法所采用的相角差无法正确反映真实相角差,导致计算结果存在原理误差。提出了一种基于修正相角差的傅氏测频算法。利用相角差作为中间量,通过修正因子对相角差进行修正,消除传统傅氏算法的原理误差。算法保留了傅氏算法不敏感于噪声和谐波的良好特性。同时,采用基于二次插值技术的采样序列迭代修正方法,克服传统测频算法速度与精度无法兼得的矛盾。仿真结果表明相比于传统傅氏算法,在相同的硬件环境下,该算法的运算速度及测量精度均有提高。%The phasor angle difference applied in traditional Fourier frequency measurement algorithm cannot correctly reflect the real difference, resulting the principle error. Therefore, Fourier frequency measurement algorithm based on modified phasor angle difference is proposed. As phasor angle, which acts as intermediate variable, is amended by correction factor, and the theoretical error of traditional Fourier algorithm is eliminated. The algorithm is not sensitive to the noise and harmonics, which is inherited from Fourier algorithm. Besides, to overcome the paradox that traditional iterative algorithm cannot have both accuracy and speed, quadratic interpolation technology is adopted for revising the sample sequences. Simulation results show that, compared with the traditional Fourier algorithm, both computing speed and accuracy of the proposed algorithm are improved under the same hardware environment.
    • 杨会翔; 朱凌云; 冯丽丽
    • 摘要: 在现代电力系统中,继电保护装置是保证电力系统安全运行和监控电能质量的重要工具.传统微机继电保护装置,存在计算速度较低和保护原理不够完善等问题.介绍了一种基于TMS320F2808+N78E366A双核继电保护装置,设计了装置的各个硬件模块,比较了全波傅氏算法和差分全波傅氏算法的滤波性能,并通过仿真计算对上述两种算法性能进行验证,选定系统的算法及采样点数,最后给出了系统主要的软件流程图.该装置运算速度快、可靠、便于维护、抗干扰能力强、体积小,并且根据用户的需要可方便地配置各种不同类型的测控保护.
    • 高崇; 余浩
    • 摘要: 傅氏算法在微机保护中得到广泛应用,本文在分析半周傅氏算法机理的基础上,从原理上解释了恒定直流分量对傅氏算法的影响,分析了傅氏算法的滤波特性及原理;针对半周傅氏算法无法消除恒定直流分量的缺点,引入差分算法,不仅完全消除了恒定直流分量,而且对衰减直流分量也进行了很好的抑制,本文通过仿真计算进行了验证。
    • 何栋炜; 彭侠夫; 蒋学程; 周结华
    • 摘要: Aiming at the complicated design and large computation problem of the present initial rotor position estimation method for interior permanent magnet synchronous motor (IPMSM) , an improved initial rotor position estimation method based on rotating high-frequency signal injection and Fourier algorithm is proposed in this paper. Phase shift and Fourier algorithm were used to obtain the preliminary estimation of rotor position from the response current, and the nonlinear characteristic of magnetic saturation was utilized to identify the rotor pole polarity. Finally the initial rotor position was determined by synthesizing the results above, and furthermore the effect of the nonlinear factor such as dead-time was analyzed. On that basis, methods such as using displacement instead of phase-shift filter (by selecting proper frequencies of the pulse width modulation ( PWM) and injected signal) , using averaging filter was proposed to improve the realization process. In the end, the verification experiments were implemented on the experimental platform. The experimental results show that the proposed method obtains the initial rotor position quickly and accurately (the estimation error is less than 6 electrical degrees), and it is simpler to realize and needs less computation than the traditional methods, which makes it suitable for engineering applications.%针对现有内置式永磁同步电机(IPMSM)转子初始位置估计方法设计复杂与计算量大的问题,提出了基于旋转高频信号注入和傅氏算法的改进方法.使用移相和傅氏算法从响应电流中提取转子位置初步估算值,利用磁路饱和特性获得转子磁极方向,综合其结果得到转子初始位置,并对死区效应等非线性因素对该方法的影响进行了分析.在此基础上提出使用移位代替移相滤波器(通过选择适当的PMW频率和注入信号频率)、平均滤波等方法改进算法实现.在实验平台上完成验证实验,实验结果表明本文提出的方法能够快速且准确地估算出IPMSM转子初始位置(误差小于6°电角度),并且该方法相比传统方法更容易实施、计算量更小,适合工程应用.
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