低压电力线载波通信与抗干扰解决途径
2014-10-17赵新正等
赵新正等
摘 要: 电网是最大、最普及、最可靠的供电网,利用低压电力线实现数据传输,具有利用现有资源、减少投资的现实意义。陕西凯星公司独创了低压电力线多频段自适应直接序列展频载波通信技术,从IC芯片、厚膜电路的研发,从电力线载波数据集中器、采集器、控制器及抗干扰硬件产品入手,彻底解决了低压电力线上的干扰问题。该技术应用在能源计量监控平台方面,是其他技术无法比拟的。
关键词: 载波通信; 多频段自适应; 抗干扰; 计量监控
中图分类号: TN913.6?34 文献标识码: A 文章编号: 1004?373X(2014)19?0108?06
Solutions for low?voltage power line carrier communication and anti?jamming
ZHAO Xin?zheng, YAO Fa?jiu, BAI Chong?qian, WANG Yang
(Shaanxi Kaistar Company, Xian 710077, China)
Abstract: Since the power grid is the largest, most popular and reliable network, data transmission through low?voltage power line is the most economical way to use the existing resource. The technology for low?voltage power line multi?frequency self?adaption DSSS carrier communication was created by Shaanxi Kaistar Company, in which the development of IC chip and thick film circuit were included. The jamming from low?voltage power line was completely solved on the basis of the data concentrator, data acquisition unit, data controller and anti?jamming products. The application of power line carrier communication in the energy resources measurement and monitoring platform is superior to the other technologies.
Keywords: carrier communication; multi?band frequency self?adaption; anti?jamming; metering monitoring
0 引 言
电力线是供电部门为用电部门(用电客户)提供供给电能的专用线路,具有普及性强、抗拉强度高、安全可靠等特点。怎样充分利用这个现有资源,在低压(380 V AC,220 V AC)端供电线上实现各类信息的传输,就显得特别必要。20世纪20年代初期很多国家的科学家就将研究的目标聚焦到了这个领域,先后研究了高压电力线通信,其典型应用为高压电力线电话通信。随着计算机技术的发展,利用其技术实现电力线载波进行数字信息传输,为了抗击电力线中的高次谐波对传输信息的干扰,电路设计上采用了多频段自适应直接序列展频(Auto?adapt Multi Frequency DSSS)技术。另外国内较多企业出于产品成本的考虑,对电子类用电电器、用电设备的电磁兼容性电路设计过于简单,有些甚至没有,特别是利用开关电源供电的电器产品;而当这部分电器产品出现故障时,会对供电电路产生高次谐波干扰。……
