摘要
针对城市轨道交通供电系统,对系统产生的谐波类型进行了分析,指出了谐波的危害性,分析了其特征,并详细分析了不同情况下注入系统节点的谐波大小的计算方法,特别是计算了35kV系统和110kV系统在不同负荷状态下的特征次谐波的大小,并进行了实际的测量,建立系统谐波计算的分布图。对110kV侧的谐波电流进行了收集整理和研究,提出了降低谐波的方法和必要性。在此基础上,明确指出轨道交通供电系统应安装滤波装置或者有源滤波装置(APF),这不但可以大大地减小对电网的影响,也可以提高自身系统的运行质量和可靠性。
This paper gives an analysis ban transportation, introduces the great of the harmonic types in the power system of the urdamage of harmonic, and analyzes the characteristics of the harmonic wave. Researches the method to calculate the of harmonic current in different conditions. Then analyzes the harmonic current distribution of urban power system in detail. Particularly calculates the value of characteristic harmonic current in different load and measures it at 35kV and 110kV system, and founds distribution models of harmonic current. The way to reduce input current harmonics has been discussed. Based on these, the author sug- gests that Electric Power System of the urban transportation should be equipped with Threebranch Filter or active harmonic Conditioner. To do so, the quality of urban power system can be improved, and the influence to state grid can be reduced greatly.
出处
《电测与仪表》
北大核心
2008年第2期1-6,共6页
Electrical Measurement & Instrumentation
基金
河南省教育厅自然科学研究资助项目(2007510029)
