低压电力线载波点对点通信性能测试系统设计与研究

The Design and Realization of Point to Point Communication Performance Testing System for Low Voltage Power Line Carrier

针对低压电力线载波点对点通信性能主要表现在发送信号电平、接收灵敏度、抗干扰能力和阻抗适应性等方面,文章建立了一套可定量测试上述参数的低压电力线载波点对点通信性能测试系统的技术方案,并阐述了系统测试原理和方法。测试系统结构简单,实用性强,能自动实现载波点对点通信信号频带和最大输出信号电平及频带外干扰电平测试、数据传输可靠性测试、接收灵敏度测试、通信抗干扰测试和模拟低压线路参数综合测试,从而为比较、改进和设计载波通信单元提供技术依据。

The point to point communication performance is mainly represented by such parameters as electrical transmitting level, receiving sensitivity, anti-interference ability and impedance adaptability. This paper presents the technical program of point to point communication performance testing system for low voltage power line carrier communi- cation to quantitatively measure the above mentioned parameters. The testing principle and method of the designed sys- tem are also formulated in this paper. The testing system has simple architecture and wide application. And the system can automatically test such parameters as signal frequency band, the maximum electrical level of output signal, interfer- ence voltage outside frequency band, reliability of the data communication, receiving sensitivity, anti-interference com- munication ability and comprehensive communication performance under simulated low voltage power line. The testing system can provide some technical guide for analyzing and designing power line carrier communication unit.