摘要
大量的谐波的存在,会直接影响供电系统的稳定性与安全性,H1仿星器的磁场电源为主要谐波源,对电网电能质量造成很大影响。首先对磁场电源的原理进行分析,利用傅氏分解对磁场电源的谐波特性进行理论分析,借助于SIMULINK工具搭建磁场电源的仿真模型,通过仿真分析,得出注入电网侧A相电流总谐波畸变率为2.52%,23与25次谐波电流分别为23.54 A与16.99 A;其次针对其谐波的特点,提出谐波治理的方法,通过引入两个单调谐滤波器对磁场电源中注入电网侧的谐波进行治理,搭建滤波器的仿真模型。仿真结果显示:注入电网侧的A相电流总谐波畸变率降低至0.37%,23与25次谐波电流分别降低至2.83 A与2.01 A,电流波形变平滑,表明针对磁场电源设计的滤波器对注入电网的谐波治理效果明显,电网电能质量得到显著提高。
The existence of a large number of harmonics will affect the stability and safety of the power system.The magnetic field power supply of H1 Stellarator is a major harmonic source,which has a great impact on the power quality of the power grid.This article first analyzes the principle of the magnetic field power supply,uses Fourier decomposition to theoretically analyze the harmonic characteristics of the magnetic field power supply,builds a simulation model of the magnetic field power supply with the help of SIMULINK tools,and through simulation analysis,the total harmonic distortion of A-phase current injected into the grid side is 2.52%,and the 23 th and 25 th harmonic currents are 23.54 A and 16.99 A,respectively.Secondly,according to the characteristics of its harmonics,a method of harmonic control is proposed.By introducing two single-tuned filters to control the harmonics injected into the power grid side of the magnetic field power supply,the simulation model of the filter is built.The simulation results show that the total harmonic distortion of the A-phase current injected into the grid side is reduced to 0.37%,and the 23 th and 25 th harmonic currents are reduced to 2.83 A and 2.01 A,respectively.It shows that the filter designed for the magnetic field power supply has a significant effect on the harmonics injected into the grid,and the power quality of the grid is significantly improved.
作者
胡桥坤
阳璞琼
侯文琦
张锦涛
刘波
HU Qiaokun;YANG Puqiong;HOU Wenqi;ZHANG Jintao;LIU Bo(School of Electrical Engineering,University of South China,Hengyang,Hunan 421001,China;The Key Laboratory of Magnetic Confinement Nuclear Fusion Research,Hengyang,Hunan 421001,China)
出处
《南华大学学报（自然科学版）》
2020年第1期40-46,共7页
Journal of University of South China：Science and Technology
基金
国家自然科学基金资助项目(11675074)
湖南省教育厅科技计划资助项目(16C1369)。
关键词
磁场电源
电能质量
谐波治理
总谐波畸变率
滤波器
magnetic field power supply
power quality
harmonic suppression
total harmonic distortion
filter
