摘要
电力线应用于通信领域源于二十世纪初,电力线通信可以减少建立新的通信网络的代价,目前电力线通信技术正日益引起人们的关注。电力线通信主要应用于:自动远程抄表、配电网自动控制、智能家庭网络、多媒体通信的最后一公里解决方案等。
本文首先介绍了国内外电力线通信的发展现状,之后对电力线通信信道的传输特性和信道噪声特性进行了研究。电力线通信具有特殊的干扰特性,包括噪声、阻抗变化、多径衰落等。而扩频通信技术具有伪随机编码调制和信号相关处理两大特点,以及抗干扰、抗噪声、抗多经衰落、低功率谱密度下工作等优点,文中也对扩频通信的原理及特点进行了探讨。
本文选用SC1128芯片作为载波通信系统的核心器件。按照模块化设计思想,将整个系统分为多个模块,文中详细讨论了各部分电路设计、芯片设置和软件设计。
最后,本文将载波通信模块分布式电源管理系统中进行了实际的应用,并对该系统的设计进行了详细的说明。
The powerline has been applied into communication field since early twentieth century. Recently, people pay more and more attention on such kind of communicated technology because the powerline communication could reduce the cost for establishing new networks. The major application of powerline communication are focused on automatic meter reading, distribution automation and supervisory control, home-bus for making the building "Intelligent" and multimedia communication used as the last mile part communication.
In this paper, we firstly introduced the development of the powerline communication technology. Then, we study the transmission characteristics of the powerline channel and the channel noise. The powerline communication had interferential features (including dominant and widely varying noise sources, impedance changes and multipath attenuation, etc.) while spread spectrum communication technology had the pseudo-random coding and signal processing features as well as the advantages of anti-interference, anti-noise, anti- multipath attenuation and working under Low-power spectral density. Thus, we also include the discussion of spread spectrum communication technology in this article.
According to the principle of the modular design, we adopted SC1128 chip as the core apparatus of our carrier communication system and divided the whole system into different modules. And then the circuit design, chip configuration and software design were discussed within every module.
Finally, the carrier communication system was applied into the distributed power management system and the design of such system was also detailed described in this article.
引文
[1]Zimmermann M,Dostert K.An Analysis of the Broadband Noise Scenario in Power21ine Networks.In:Proceedings of the 4th International Symposium on Power21ine Communications and Its Applications.Limerick(Ireland):2000.131-138
[2]R.C.Hemminger,L.J.Gale and J.B.O'Neal,Signal Propagation on Single Phase Power Distribution Lines at Power Line Carrier Frequencies,IEEE Trans.Power Delivery,Vol.PWRD-2,No.1,Jan.1987,pp.28-33.
[3]R.M.Vines,H.J.Trussell,K.S.Shuey and J.B.O'Neal,Impedance of the Residential Power-Distribution Circuit,IEEE Trans.Electromagn.Compat.Vol.EMC-27,No.1,Feb.1985,pp.6-12
[4]Radford D.Spread-Spectrum Data Leap Through AC Power Wiring.IEEE Spectrum,1996
[5]Chan M H L,Donaldson R W.Attenuation of Communication Signals on Residential and Commercial Intrabuilding Power-Distribution Circuits.IEEE Trans on Electromagnetic Compatibility,1986,EMC-28(4)
[6]邹志威,陈启美,左雯.跻身未来的电力线通信(一)[J].电力系统自动化,2003(3):72-76
[7]马强,陈启美,李勃.跻身未来的电力线通信(二)[J].电力系统自动化,2003(4):72-76
[8]沈薇,陈启美,马强.跻身未来的电力线通信(三)[J].电力系统自动化,2003(5):71-75
[9]李勃,陈启美,沈薇.跻身未来的电力线通信(五)[J].电力系统自动化,2003(9):77-81
[10]J.B.O'Neal.The residential power circuit as a communication medium.IEEE Trans.Consumer Electron.1986(32):567-577
[11]王赞基,郭静波.电力线扩频载波通信技术及其应用[J].电力系统自动化,2000(11):64-68
[12]高锋,董亚波.低压电力线载波通信中信号传输特性分析[J].电力系统自动化,2000(7):36-40
[13]张圣清,于东海,马建旭,邹采荣.低压电力线通信信道噪声特性的测试与分析[J].电力系统通信,2003(1):35-38
[14]王乔晨,郭静波,王赞基.低压配电网电力线高频噪声的测量与分析[J].电力系统自动化,2002(1):18-21
[15]刘华玲,张保会,刘海涛.扩频通信、OFDM调制技术及其在电力线通信中的应用分析[J].继电器,2001(11):17-21
[16]卢文冰,李桂林,张伟.双频载波通信电路的研制[J].电测与仪表,2004(11):25-28
[17]黄红梅,汤荣江,罗嵘.基于电力线的信息家电组网方案[J].计算机工程,2005(7):202-204
[18]赵丙镇,宋健.Home-Plug第一届电力线通信技术会议综述[J].电力系统通信,2006(27):7-11
[19]王凤碧,黄荣辉,黄均才,李勇,吴跃,周明天.电力线通信最优数据帧长度研究[J].东莞理工学院学报,2005(3):84-88
[20]李伟波,李伟.一种电力线载波通讯节点的具体实现[J].电子技术应用,2002(1):50-52
[21]樊昌信.通信原理(第4版)[M].北京:国防工业出版社,1995
[22]查光明,熊贤祚.扩频通信[M].西安:西安电子科技大学出版社,1990
[23]朱近康.扩展频谱通信及其应用[M].合肥:中国科技大学出版社,1993
[24]童师白.模拟电子技术基础(第3版)[M].北京:高等教育出版社,2003
[25]张毅刚,彭喜源,谭晓昀,曲春波.MCS-51单片机应用设计[M].哈尔滨:哈尔滨工业大学出版社,1997
[26]胡伟,季晓衡.单片机C程序设计及应用实例[M].北京:人民邮电出版社,2003
[27]沈建华,杨艳琴,翟骁曙.msp430系列16位超低功耗单片机原理与应用[M].北京:清华大学出版社,2004
[28]秦龙.MSP430单片机应用系统开发典型实例[M].北京:中国电力出版社,2005
[29]姜冰.基于电力线传输的职能建筑控制网络通信系统设计与研究[D]:[湖南大学硕士学位论文].长沙,湖南大学,2004
[30]王显光.电力线扩频载波数传机的设计[D]:[电子科技大学硕士学位论文].成都,电子科技大学,2004
[31]兰宇.电力载波MODEM的开发及电力载波扩频数传机性能研究[D]:[电子科技大学硕士学位论文].成都,电子科技大学,2002
[32]时清锋.基于SC1128的电力线载波通信装置的研究[D]:[南京理工大学硕士学位论文].南京,南京理工大学,2004
[33]吕文化.室内电力线扩频数据通信技术研究[D]:[南京航空航天大学硕士学位论文].南京,南京航空航天大学,2004
[34]黄荣辉.电力线通信(PLC)计算机网络关键技术及其应用研究[D]:[电子科技大学博士学位论文].成都,电子科技大学,2002
[35]孟祥育.电力线扩频载波芯片设计[D]:[浙江大学硕士学位论文].杭州,浙江大学,2003
[36]SC1128扩频通信芯片使用说明书[K],北京智源利和微电子技术有限公司,2002