输电线路高次谐波放大分析
Analysis of High Harmonic Amplification in Transmission Lines
严安1
作者信息
- 1. 国网江苏省电力公司扬州供电分公司,江苏扬州 225000
- 折叠
摘要
随着电网规模的快速发展,用电量需求的不断增加,人们对电能质量提出了更高的要求.但随着半导体开关设备、铁磁饱和设备等现代设备的使用,谐波问题普遍存在.谐波会对电网造成严重危害,不但会引发附加损耗,还会对电网的安全和稳定运行造成一定的不利影响.输电线路谐波传递是否出现放大主要取决于线路参数和所接负荷,而系统中元件的容性、感性参数会引起谐振,当注入系统的谐波次数和谐振点相同时,谐波会放大.基于输电线路谐波放大的实际案例,通过搭建系统等效阻抗模型,结合实地测试参数,利用ETAP软件仿真分析得出谐波放大原因,并提出一种有效的谐波抑制方案.
Abstract
With the rapid development of the scale of the power grid and the increasing demand for electricity,people have put forward higher requirements for power quality.However,with the use of modern equipment such as semiconductor switchgear and ferromagnetic saturation equipment,harmonic problems are widespread.Harmonics will cause serious harm to the power grid,it will not only cause additional losses,but also have a certain adverse impact on the safety and stable operation of the power grid.Whether the harmonic transmission of the transmission line is amplified mainly depends on the line parameters and the connected load,and the capacitive and inductive parameters of the components in the sys-tem will cause resonance,and when the harmonic number and resonance points injected into the system are the same,har-monic amplification will occur.Based on the actual case of harmonic amplification of transmission lines,this paper builds the equivalent impedance model of the system,combines the field test parameters,and uses ETAP software simulation to analyze the reasons for harmonic amplification,and proposes an effective harmonic suppression scheme.
关键词
电能质量/谐波放大/谐波抑制/ETAPKey words
power quality/harmonic amplification/harmonic suppression/ETAP引用本文复制引用
出版年
2024
NETL
NSTL
万方数据