电器对低压电力线载波通信信道特性的影响

为了深入分析和研究各类电器的负载阻抗特性及其对低压电力线载波通信信道特性的影响，提出一种基于矢量网络分析仪的时频2维电器阻抗测量方法，并通过该方法对各类电器在不同工作状态下的阻抗特性进行了测量，结合自下而上的电力线信道建模方法对接入不同类型电器负载的典型电力线信道场景的信道特性进行了理论分析。根据测量可得，相同的电器负载在不同空间位置分布对电力线信道特性造成的影响不同，不同的电器负载在同一位置对电力线信道特性造成的影响不同，且时变负载会导致接入该负载的电力线信道也呈现出时变特性。理论分析与测试结果表明，时频变的电器负载阻抗是影响低压电力线载波通信信道特性的关键因素之一。

Influence of electrical appliance on the channel characteristics of low voltage power line carrier communication

In order to study the impact of electrical appliance on the characteristics of low-voltage power line channel,this paper presents the two-dimensional time and frequency electrical appliance impedance measurement method based on a vector network analyzer. Through this method, the impedance characteristics of all kinds of electrical appliance are measured under different working conditions. Then, the channel characteristics of a typical power line channel scenario connecting to different types of electrical appliance loads are theoretically analyzed in combination with bottom-up power line channel modeling. According to the measurement, the same load of electrical appliance in different spatial locations affect the power line channels differently. The influence of different electrical appliance on the characteristics of power line channels is different when the load of electrical appliance is connected to the same load node. In addition, the time-varying load causes the power line channels accessing the load to present time-varying characteristics. Theoretical analysis and test results show that load impedance of electrical appliance with time-frequency changes is one of the key factors that affect the channel characteristics of low-voltage power line carrier communication.