工频通信系统上行信号对电压相位差的自适应解调

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Abstract The present inbound demodulation in two way power frequency automatic communication system(TWACS)is implemented with the voltage zero-crossing signals as the benchmark, and the voltage phase difference of transceiver can cause the deviation in receiving time-domain and influence the communication performance seriously, and cannot take upload alarm information limited by master-slave mode. In this connection, this paper proposes a new method, which added preface information based on pseudorandom sequence in inbound modulation, and the receiver will change the preface information into composite signal according to the coding. Due to the modulation components of the composite signal being improved, and the precise demodulation time-domain can be found through wigner distribution for time-frequency analysis, which makes the inbound demodulation adapt the voltage phase difference of transceiver, and thereby enhances the communication performance. Meanwhile, inbound demodulation based on active mode can be conducted by using the autocorrelation of pseudorandom sequence, thus realize the real-time alarm functions. The demodulation performance in this design has confirmated by field scale applications.

Key words： keywords：Two way fower frequency automatic communication system industrial electrical network pseudo-random sequence wigner distribution time-frequency analysis

Received: 20 September 2012 Published: 12 December 2013

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TN915

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	Lu Wenbing
	Sun Fengjie
	Luo Yingli

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Lu Wenbing,Sun Fengjie,Luo Yingli. Self-Adaption Demodulation for Voltage Phase Difference of Inbound Signals in TWACS[J]. Transactions of China Electrotechnical Society, 2013, 28(1增): 251-258.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I1增/251

[1] 周陶涛, 马正新, 王剑, 等. 低压电力线通信性能测试分析与路径选择[J]. 电工技术学报, 2008, 23(8): 126-130.
Zhou Taotao, Ma Zhengxin, Wang Jian, et al. Testing and analysis performance of LV-PLC and transmission path selection[J]. Transactions of China Electrotechnical Society, 2008, 23(8): 126-130.
[2] 刘晓胜, 胡永军, 张胜友. 低压配电网电力线载波通信与新技术[J]. 电气应用, 2006, 25(2): 5-7.
Liu Xiaosheng, Hu Yongjun, Zhang Shengyou. Low voltage distribution network power line carrier communication with new technology[J]. Electrote- chnical Application, 2006, 25(2): 5-7.
[3] 李天云, 汪峰, 于翠翠. 基于时频方法的工频通信系统上行信号检测[J]. 电力自动化设备, 2008, 28(6): 55-58.
Li Tianyun, Wang Feng, Yu Cuicui. Detection of inbound signal based on time-frequency method for power frequency communication system[J]. Electric Power Automation Equipment, 2008, 28(6): 55-58.
[4] Sioe T Mak. Power delivery infrastructure differences and their impact on different types of power line communications for automaticmeter reading[C]. CIRED, 2001: 4. 33.
[5] 王智慧, 刘国军, 李建岐, 等. 一种实用的工频通信系统信号检测方法[J]. 电测与仪表, 2010(6): 18-31.
Wang Zhihui, Liu Guojun, Li Jianqi, et al. Practical signal detection algorithm for TWACS [J]. Electrical Measurement & Instrumentation, 2010(6): 18-31.
[6] 张世平, 张绍卿, 李德胜. 基于全通滤波器的IIR陷波器在抑制电力线通信中的谐波干扰的研究[J].电工技术学报, 2003, 18(3): 107-110.
Zhang Shiping, Zhang Shaoqing, Li Desheng. The study of rejecting harmonic interference in power line communications using IIR notch filter based on all-pass filter[J]. Transactions of China Electrote- chnical Society, 2003,18(3): 107-110.
[7] 张世平, 周庆东, 张绍卿. 基于时频分析的工频通信信号特征提取[J]. 中国电机工程学报, 2004, 24(7): 85-89.
Zhang Shiping, Zhou Qingdong, Zhang Shaoqing. Features extraction of TWACS signal based on time-frequency analysis[J]. Proceedings of the Csee, 2004,24(7): 85-89.
[8] Sioe T Mak, Richard L Maginnis. Power frequency communication on long feeders and high levels of harmonic distortion[J]. IEEE Transactions on Powa Delivery, 1995, 10(4): 1731-1736.
[9] Sioe T Mak, TWACS. A power line communication technology for power distribution network control and monitoring [J]. IEEE Transactions on Power Delivery, 1986 (1): 66-72.
[10] 李晓峰, 周宁, 周亮. 通信原理[M].北京：清华大学出版社, 2008.
[11] 张世平, 张绍卿, 刘瑞叶. 双向工频通信信号在配电网中的传输特性[J]. 电网技术, 2003, 27(5):63 -66.
Zhang Shiping, Zhang Shaoqing, Liu Ruiye. Two way power frequency automatic communication system (TWACS) signal transmission characteristics analysis on power distribution network[J]. Power System Technology, 2003, 27(5): 63-66.
[12] Sioe T Mak. Application of a differential technique for characterization of waveformdistortions[C]. Power Engineering Society Winter Meeting, 2000(2): 975-980.
[13] 姜建国, 张智平, 邱阿瑞. 威格纳分布在异步电动机故障诊断中的应用[J]. 清华大学学报(自然科学版), 1993, 33(1): 74 -80.
Jiang Jianguo, Zhang Zhiping, Qiu Arui. Diagnose fault of induction motor with Wigner distribution[J]. Journal of Tsinghua University (Science and Technology), 1993, 33(1): 74-80.
[14] 姜霞, 马正新, Nguimbis J, 等. 低压配电网载波通信噪声特性研究[J]. 中国电机工程学报, 2000, 20(11): 30 -35.
Jiang Xia, Ma Zhengxin, Nguimbis J, et al. Noise characteristics investigation in low voltage powerline communication[J]. Proceedings of the CSEE, 2000, 20(11): 30 -35.
[15] 关红彦, 肖伟, 吕扬生. 抑制维格纳分布交叉项干扰的自谱窗方法[J]. 信号处理, 2003, 19(3): 215-218.
Guan Hongyan, Xiao Wei, Lu Yangsheng. The self-spectrum window (SSW) method of WVD’s interference-term suppression [J]. Signal Processing, 2003, 19(3): 215-218.
[16] 高宪军, 陈超, 张杰, 等. 抑制维格纳分布交叉干扰项的联合算法[J]. 吉林大学学报(信息科学版), 2009, 27(2): 127-132.
Gao Xianjun, Chen Chao, Zang Jie, et al. Amelioration algorithm to suppress the cross-term interference of WVD[J]. Journal of Jilin University (Information Science Edition), 2009, 27(2): 127-132.
[17] Jacek Kliber, Wencong Wang, Wilsun Xu. An improved signal detection algorithm for TWACS Based Power Line Signas[C]. Electrical and Computer Engineering, 2006:1329 -1332.
[18] 徐长发, 李国宽. 实用小波分析方法[M]. 武汉: 华中科技大学科出版社, 2009.