Radiation noise test method applied to power line communication network

Abstract

The invention relates to a radiation noise test method applied to a power line communication network. The method comprises the following steps of: extracting a first noise voltage of a live wire to a grounding wire and a second noise voltage of a neutral wire to the grounding wire in the power line communication network through a linear impedance stabilizing network to obtain a conducted noise in the power line communication network; calculating a vector sum and a vector difference for the first noise voltage and the second noise voltage through a noise separation network to obtain a differential mode noise voltage and a common-mode noise voltage so as to separate a differential mode conducted noise voltage from a common-mode conducted noise voltage; dividing the common-mode noise voltage by 50 ohms to obtain a common-mode noise current; and obtaining a radiation noise electric field emitted to a free space according to the common-mode noise current. The conducted noise is separated into a common-mode noise and a differential mode noise to obtain the relation between the radiation noise and the common-mode noise current so as to simplify test equipment and reduce test cost.

Description

technical field [0001] The invention relates to a method for estimating radiation noise applied to a power line communication network, and belongs to the fields of electromagnetic compatibility testing and power line communication. Background technique [0002] The power line communication network (Power Line Communication) is a network that uses carrier technology to transmit information using power lines as the transmission medium. With this technology, electric energy and high-frequency signals can be transmitted through the same power line without using dedicated communication lines. At present, there is no method for estimating electromagnetic radiation specifically for power line communication networks, and the cost of using microwave anechoic chambers to measure electromagnetic radiation is relatively high. Therefore, how to develop a prediction method for power line communication networks based on the characteristics of power line communication networks A simple met...

AI Technical Summary

Problems solved by technology

At present, there is no method for estimating electromagnetic radiation specifically for power line communication networks, and the cost of using microwave anechoic chambers to measure electromagnetic radiation is relatively high. Therefore, how to develop a prediction method for power line communication networks based on the characteristics of power line communication networks Estimate radiation noise simple method is the problem that the present invention researches

Images