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高压电器  2015 

五点加权FFT介质损耗角测量算法的研究

, PP. 88-92

Keywords: 介质损耗角,频谱泄漏,FFT,五点加权快速傅里叶变换

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Abstract:

电气设备绝缘介质损耗角(介损角)的实时检测,可以为设备的绝缘监测提供可靠依据。采用FFT算法进行介损角测量时,因非同步采样会造成频谱泄漏,从而影响介质损耗角的测量精度。笔者分析了FFT算法的频谱泄漏效应,在此基础上采用了5点加权FFT算法实现对介损角的检测。该算法对信号傅里叶变换后所得序列中5个点进行加权运算,从而减小了频谱泄漏误差,提高了介损角的测量精度。通过仿真给出了该算法在频率波动、3次谐波变化、采样频率变化、采样点数变化、直流分量变化、介损角理论值变化、初始相角变化及白噪声变化时计算所得介损角的变化情况,验证了该算法的有效性。

References

[1]  刘 力,孙结中. 中间变压器对电容式电压互感器介损测量的影响[J]. 电力建设,2001,22(12):11-14. LIU Li,SUN Jiezhong. The effect of internal potential transformer on the measurement of dielectric loss of capacitance voltage transformer[J]. Electric Power Construction,2001,22(12):11-14.
[2]  赵秀山,谈克雄,朱德恒,等. 介质损耗角的数字化测量[J]. 清华大学学报(自然科学版),1996,51(9):51-56. ZHAO Xiushan,TAN Kexiong,ZHU Deheng,et al. Study on digital measurement for dielectric loss angle[J]. Journal of Tsinghua University(Sci. & Tech.),1996,51(9):51-56.
[3]  梁 英,律方成,李成榕,等. 两种高精度FFT算法在介损测量中的应用[J]. 华北电力大学学报,2004,31(2):12-15. LIANG Ying,LYU Fangcheng,LI Chengrong,et al. Appli-cation of two high-accuracy FFT algorithms to measure dielectric loss[J]. Journal of North China Electric Power University,2004,31(2):12-15.
[4]  柴旭峥,关根志,文习山,等. tanδ高准确度测量的加权插值FFT算法[J]. 高电压技术,2003,29(2):32-33. CHAI Xuzheng,GUAN Genzhi,WEN Xishan,et al. The hanning-windowed interpolated algorithm for dielectric loss measurement with high accuracy[J]. High Voltage Enginee-ring,2003,29(2):32-33.
[5]  王 楠,律方成,梁 英,等. 基于高精度DFT的介损数字测量方法[J]. 高电压技术,2003,29(4):3-5. WANG Nan,LYU Fangcheng,LIANG Ying,et al. Digital measurement of dielectric loss based on high accuracy DFT algorithm[J]. High Voltage Engineering,2003,29(4):3-5.
[6]  徐志钮,律方成,赵丽娟. 基于加汉宁窗插值的谐波分析法用于介损角测量的分析[J]. 电力系统自动化,2006,30(2):81-85. XU Zhiniu,LYU Fangcheng,ZHAO Lijuan. Analysis of dielectric loss angle measurement by hanning windowing interpolation algorithm based on FFT[J]. Automation of Electric Power Systems,2006,30(2):81-85.
[7]  王微乐,李福祺,谈克雄. 测量介质损耗角的高阶正弦拟合算法[J]. 清华大学学报(自然科学版),2001,41(9):5-8. WANG Weile,LI Fuqi,TAN Kexiong. Higher-order sine fitting algorithm for dielectric loss measurement[J]. Journal of Tsinghua University(Science and Technology),2001,41(9):5-8.
[8]  左自强,徐 阳,曹晓珑,等. 计算电容型设备介质损耗因数的相关函数法的改进[J]. 电网技术,2004,28(18):53-57. ZUO Ziqiang,XU Yang,CAO Xiaolong, et al. Improvement to correlation algorithm for dielectric dissipation factor calculation of capacitance equipments[J]. Power System Technology,2004,28(18):53-57.
[9]  冯小华,张承学. 修正的谐波分析法可提高介损在线测量准确度[J]. 高电压技术,2004,30(8):36-37. FENG Xiaohua,ZHANG Chengxue. Modified harmonics analysis approach for increasing precision in on-line measuring tanδ[J]. High Voltage Engineering,2004,30(8):36-37.
[10]  王 楠,律方成,李燕青,等. 相关函数法计算容性设备介质损失角正切[J]. 华北电力大学学报,2001,22(3):22-25. WANG Nan,LYU Fangcheng,LI Yanqing,et al. Calculation of tanδ based on correlation function algorithm[J]. Journal of North China Electric Power University,2001,22(3):22-25.
[11]  丁 晖,申忠如,刘君华. 基于小波和相关分析的虚拟介损在线检测仪[J]. 高电压技术,2000,26(6):17-19. DING Hui,SHEN Zhongru,LIU Junhua. On line measurement of dielectric loss tamgent for capacitive-type equipment based on wavelet & correlation technique[J]. High Voltage Engineering,2000,26(6):17-19.
[12]  曹宇亚,申忠如,任稳柱. 介质损耗带电检测数字化处理方法的研究[J]. 高压电器,2000,36(3):17-19. CAO Yuya,SHEN Zhongru,REN Wenzhu. Study on the digital processing for on-line detection of dielectric loss[J]. High Voltage Apparatus,2000,36(3):17-19.
[13]  王 楠,律方成,梁 英. 基于修正理想采样频率的谐波分析法在介损在线测量中的应用[J]. 电测与仪表,2003,40(7):12-15. WANG Nan,LYU Fangcheng,LIANG Ying. Application of harmonics analysis approach based on modified ideal sampling frequency in on-line measuring tanδ[J]. Electrical Measurement & Instrumentation,2003,40(7):12-15.
[14]  陈 楷,王 卉,张承学. 介损角测量中非同步采样算法的研究[J]. 继电器,2004,32(14):5-7. CHEN Jie,WANG Hui,ZHANG Chengxue. Research on dielectric loss angle measurement in the condition of non-synchronous sampling[J]. Relay,2004,32(14):5-7.
[15]  陈天翔,段建东,张保会,等. 用傅里叶变换测量介质损耗因数tan δ的软件同步算法[J]. 电力系统自动化,2005,29(15):58-62. CHEN Tianxiang,DUAN Jiandong,ZHANG Baohui,et al.New emendatory FFT algorithm of measuring dielectric loss factor tanδ[J]. Automation of Electric Power Systems,2005,29(15):58-62.
[16]  张忠蕾,李庆民,陈 鹏. 谐波条件下高压电气设备介质损耗因数的定义和数字化算法[J]. 高压电器,2004,40(5):327-329. ZHANG Zhonglei,LI Qingmin,CHEN Peng. Definition and digital algorithms for dielectric loss factor of high voltage power apparatus under harmonics condition[J]. High Voltage Apparatus, 2004,40(5):327-329.
[17]  李天云,袁明哲,蔡国伟,等. 基于随机子空间和最小二乘法的介质损耗角检测方法[J]. 高电压技术,2011,37(4):828-833. LI Tianyun,YUAN Mingzhe,CAI Guowei,et al. Measurement algorithm of dielectric loss angle based on SSI-LS[J]. High Voltage Engineering,2011,37(4):828-833.
[18]  薛 蕙, 杨仁刚. 基于FFT的高精度谐波检测算法[J]. 中国电机工程学报,2002,22(12):106-110. XUE Hui,YANG Rengang. Precise algorithms for harmonic analysis based on FFT algorithm[J]. Proceedings of the CSEE,2002,22(12):106-110.

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