摘要
介绍了高次谐波对电容器组的危害,提出用加装串联电抗器的方法可以防止发生涌流和谐波放大现象。建立了并联电容器装置模型,通过电路分析方法推导出电抗率K的计算公式。又通过天津某110kV变电所工程实例,进一步计算验证并联电抗器的电抗率的选择。最后得出结论:对于还没有投运电容器组的电抗器装置,应串联电容器装置并充分考虑电容器组接入母线处的谐波背景;对于已经投运电容器的电抗器装置,其串联电抗器选择是否合理需进一步验算,并组织现场实测,了解电网谐波背景的变化。
The damage of higher harmonics to capacitor group in electrical system is discussed. A method to prevent the inrush current and harmonic amplification by installing series reactor is proposed. A model of parallel capacitor setup was built. A formula for calculating the reactance rate K was achieved by a circuit analysis method. The calculated reactance rate of parallel reactor was verified by an example of ll0KV substation. The conclusion is that harmonic background at the point of parallel reactor access to the bus should be fully considered, and the rationality of selecting the series reactor must be verified further more.
出处
《现代电子技术》
2012年第24期182-184,共3页
Modern Electronics Technique
基金
国家"863"重点课题:重型柴油机排放特性调整及后处理装置系统集成优化和整车匹配研究(2007Y116)
国家教育部留学回国人员启动基金:低温等离子体降低柴油机四种有害物排放的研究
关键词
电容器组
串联电抗器
高次谐波
涌流
capacitor group
series reactor
higher harmonic
inrush current
