宽带电力线载波点对点通信性能测试平台设计

在Q/GDW 1379.4-2013通信单元检验技术规范的要求下,为测试低压宽带电力线载波通信单元的工作频段、载波信号发射功率谱密度、抗衰减能力、抗噪声干扰和抗阻抗变化等基本通信性能,给电网公司建设宽带电力载波远程集抄系统提供数据参考和方案依据。根据宽带电力线载波技术的特点搭建了点对点通信性能测试平台。该平台采用三级级联双SMA电源滤波组合,可有效隔离电网谐波、脉冲信号及电力线背景噪声对宽带载波通信单元性能的影响,使测试平台能够充分模拟低压电力线通道,还原现场集抄台区的运行状况,评估载波通信单元的实际可用性。试验数据证明:所建点对点通信性能测试平台试验环境纯净,对2MHz~30MHz通带内的信号衰减达93 d B,可确保宽带载波通信产品测试结果的稳定可靠。

Design of Point to Point Communication Performance Testing Platform for Broadband Power Line Carrier

In order to test the performances of working frequency , signal power spectral density , anti-jamming capa-bility, noise immunity and anti-impedance changes for low voltage broadband power line carrier communication unit under the requirements of Q/GDW 1379.4-2013 technical specification and offer data reference , scheme basis to grid company to construct remote metering system for broadband power line carrier , a point to point communication per-formance testing platform is formed according to the characteristics of broadband power-line carrier .Three level cas-cade power filter with double SMA terminals are adopted which can insulate the influence on the communication per -formance for broadband carrier communication unit caused by harmonic , pulse signal and power-line background noise .As a consequence , the testing platform mentioned above can fully simulate the low voltage power line channel , restitute the operational state of site metering pilot and assess the actual usage of carrier communication unit .Experi-mental data certifies that the experiment environment of the testing platform constructed is pure , which can attenuate signal within the bandwidth of 2MHz~30MHz up to 93dB so as to ensure that the tested performance data of broad-band carrier communication unit is stable and reliable .