三次谐波对电能计量及中性线的影响研究

Research on the Influence of Third Harmonic on Electric Energy Metering and Neutral Line

在过去,我国电力系统的供电频率主要以50 Hz为主,但在经济不断发展的背景下,社会用电需求持续增长,电网负荷也随之上升。尤其是节能灯具和显示器设备应用量的增加,使电网出现三次谐波的概率大幅度上升。而三次谐波的产生,会对电能计量和中性线造成极为严重的影响。文章以三次谐波对电能计量及中性线的影响为题,首先阐述三次谐波的概念、原因和危害,然后对其影响进行细致分析,最后提出治理谐波的建议,希望为相关行业提供借鉴。

In the past,the power supply frequency of my country's power system was mainly based on 50 Hz,but in the context of continuous economic development,the demand for electricity in society continues to increase,and the load on the grid also increases.In particular,the increase in the application of energy-saving lamps and display equipment has greatly increased the probability of third harmonics in the power grid.The generation of the third harmonic will have a very serious impact on the electric energy measurement and the neutral line.This article takes the influence of the third harmonic on electric energy measurement and neutral line as the topic.Firstly,it explains the concept,causes and hazards of the third harmonic,and then conducts a detailed analysis of its impact,and finally puts forward suggestions for harmonic control,hoping to provide relevant industries Draw on.