摘要
为了减小谐波对系统的影响,降低谐波治理成本,对电容滤波型三相桥式整流电路谐波叠加进行深入研究。理论推导出了其网侧谐波电流初相角的数学表达式,得到了谐波电流初相角在相位空间的分布状况。在Matlab/Simulink中搭建仿真模型,将谐波电流初相角分布状况的仿真结果与理论分析结果进行比较,验证了仿真模型的正确性。通过量化谐波电流叠加抵消或削弱的效果,表明谐波电流初相角的分散性和滤波电容的差异性对谐波电流叠加抵消或削弱效果均有影响。
In order to diminish the influence of harmonics on the system and reduce the management cost, the superpo- sition of harmonics in capacitor-filtered three-phase-bridge rectifier circuit is studied. The mathematical expression of the grid-side harmonic current initial-phase angle is deduced theoretically, and its distribution in phase space is obtained. A simulation model in MATLAB/SIMULINK is built, and the distribution of harmonic current initial-phase angle is compared between the results from simulation and theoretical analysis, which verifies the correctness of the simulation model. Through quantifying the effect of the offset or weakened superposition of harmonic currents, it is indicated that both the diversity of harmonic current initial-phase angle and the difference in filtered capacitors have effect on the offset or weakened superposition of harmonic currents.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2017年第11期75-80,共6页
Proceedings of the CSU-EPSA
基金
国家电网公司科技资助项目(SGRI-DL-71-14-004)
关键词
滤波电容
整流电路
谐波
仿真
叠加
分散系数
filtered capacitor
rectifier circuit
harmonic
simulation
superposition
diversity coefficient
