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低频振荡在线辨识需用到广域测量系统（WAMS）的采集信号，而WAMS采集的信号中常伴有高斯白噪声，经过常规的低通滤波处理后会产生高斯色噪声，从而影响辨识的精度. 针对在线辨识中的色噪声问题，提出以互相关函数（CCF）来代替实测信号，从而抑制色噪声，并结合总体最小二乘-旋转不变技术参数估计（TLS-ESPRIT）算法进行模态辨识. 仿真结果表明，CCF-TLS-ESPRIT算法能够有效辨识出色噪声环境中的系统低频振荡模态，并具有一定的效率.
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关键词:
- 广域测量技术 /
- 互相关函数 /
- 总体最小二乘-旋转不变技术参数估计 /
- 高斯色噪声
On-line identification for low frequency oscillation needs to measure signals which couple with white Gaussian noise from wide area monitoring systems (WAMSs). Processed by low pass filter, white Gaussian noise can turn into colored Gaussian noise, so the accuracy of oscillatory indentification would be reduced. To solve the problem of colored Gaussian noise, in this paper we propose a cross-correlation-function (CCF) method that could reduce the influence of colored Gaussian noise. Combined with TLS-ESPRIT algorithm, CCF-TLS-ESPRIT could identify oscillatory modes in the environment of colored Gaussian noise rapidly. The simulation results show the effectiveness of the proposed method.-
Keywords:
- wide area monitoring systems /
- cross-correlation-function /
- TLS-ESPRIT /
- colored Gaussian noise
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[16] Hua Y B, Sarkar T K 1991 IEEE Trans. on Signal Process. 39 892
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[18] Rouquette S, Najim M 2001 IEEE Trans. Signal Process. 49 237
[19] Zhang J, Xu Z, Wang F 2007 Automation of Electric Power Systems 31 84 (in Chinese) [张静, 徐政, 王峰 2007 电力系统自动化 31 84]
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[21] Li T Y, Zhu L, Song L et al. 2009 Trans. China Electrotech. Soc. 24 38 (in Chinese) [李天云, 祝磊, 宋莉, 等 2009 电工技术学报 24 38]
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[23] Wang D W, Su Y, Ma X Y 2005 Acta Elec. Sin. 33 1015 (in Chinese) [王党卫, 粟毅, 马兴义 2005 电子学报 33 1015]
[24] Xu L X, Wang B H 1993 J. Tsinghua Univ. 33 68 (in Chinese) [徐立新, 王伯翰 1993 清华大学学报 (自然科学版) 33 68]
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[1] Kundur P 1994 Power System Stability and Control (1st Ed.) (New York: McGraw-Hill Inc) pp320–353
[2] Ni Y X, Chen S S, Zhang B L 2002 Dynamic Power System Theory and Analysis (Beijing: Tsinghua University Press) p212–228 (in Chinese) [倪以信, 陈寿孙, 张宝霖 2002 动态电力系统的理论和分析 (北京: 清华大学出版社) 第212–228页]
[3] Wang L, Semlyen A 1990 IEEE Trans. Power Syst. 5 635
[4] Ju P, Xie H, Meng Y J 2005 Proceedings of the CSEE 25 56 (in Chinese) [鞠平, 谢欢, 孟远景 2005 中国电机工程学报 25 56]
[5] Girgis A A, Ham F M 1980 IEEE Trans. Aeros. Electron. Syst. 16 434
[6] Korba P, Larsson M, Rehtanz C 2003 Proceedings of 2003 IEEE Conference on Control Applications Istanbul, Turkey, IEEE, 2003 p183–188
[7] Vittal V, Heydt G T, Messina A R 2008 IEEE Trans. Power Syst. 23 1408
[8] Yang Y F, Wu Y F, Ren X M, Qiu Y 2010 Acta Phys. Sin. 59 3778 (in Chinese) [杨永锋, 吴亚锋, 任兴民, 裘焱 2010 59 3778]
[9] Yang Y F, Wu Y F, Ren X M, Qin W Y, Zhi X Z, Qiu Y 2008 Atca Phys. Sin. 58 3742 (in Chinese) [杨永锋, 吴亚锋, 任兴民, 秦卫阳, 支希哲, 裘焱 2008 58 3742]
[10] Yang Y F, Ren X M, Qin W Y, Wu Y F, Zhi X Z 2008 Atca Phys. Sin. 58 3742 (in Chinese) [杨永锋, 任兴民, 秦卫阳, 吴亚锋, 支希哲 2008 57 6139]
[11] Zhang X Q, Liang J 2013 Atca Phys. Sin. 62 050505 (in Chinese) [张学清, 梁军 2013 62 050505]
[12] Li T Y, Xie J A, Zhang F Y, Li X C 2007 Proceedings of the CSEE 27 79 (in Chinese) [李天云, 谢家安, 张方彦, 李晓晨 2007 中国电机工程学报 27 79]
[13] Trudnowski D J 1999 IEEE Trans. Power Syst. 14 226
[14] Liu H C, LI X Y 2002 Proceedings of the CSEE 22 54 (in Chinese) [刘红超, 李兴源 2002 中国电机工程学报 22 54]
[15] Kumaresan M R, Tufts D W 1982 IEEE Trans. Acoustics Speech and Signal Process. 30 833
[16] Hua Y B, Sarkar T K 1991 IEEE Trans. on Signal Process. 39 892
[17] Wang Y J, Yu J L 2007 Proceedings of the CSEE 27 12 (in Chinese) [王宇静, 于继来 2007 中国电机工程学报 27 12]
[18] Rouquette S, Najim M 2001 IEEE Trans. Signal Process. 49 237
[19] Zhang J, Xu Z, Wang F 2007 Automation of Electric Power Systems 31 84 (in Chinese) [张静, 徐政, 王峰 2007 电力系统自动化 31 84]
[20] Jin H M, He W P, Zhang W, Feng A X, Hou W 2012 Atca Phys. Sin. 61 129202 (in Chinese) [金红梅, 何文平, 张文, 冯爱霞, 侯威 2012 61 129202]
[21] Li T Y, Zhu L, Song L et al. 2009 Trans. China Electrotech. Soc. 24 38 (in Chinese) [李天云, 祝磊, 宋莉, 等 2009 电工技术学报 24 38]
[22] Hou W B, Liu T Q, Li X Y 2010 Atca Phys. Sin. 59 3531 (in Chinese) [侯王宾, 刘天琪, 李兴源 2010 59 3531]
[23] Wang D W, Su Y, Ma X Y 2005 Acta Elec. Sin. 33 1015 (in Chinese) [王党卫, 粟毅, 马兴义 2005 电子学报 33 1015]
[24] Xu L X, Wang B H 1993 J. Tsinghua Univ. 33 68 (in Chinese) [徐立新, 王伯翰 1993 清华大学学报 (自然科学版) 33 68]
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