带有并联电阻的双调谐滤波器参数特性分析

高压直流输电系统中,双调谐滤波器使用广泛。将电阻并联在双调谐滤波器上可使双调谐滤波器获得较好的高通滤波的性能,并减小滤波器之间及与系统之间发生谐振的可能性,但同时加大两个串联谐振附近的阻抗,也增加了整个滤波器的谐波有功损耗。通过分析双调谐滤波器和带有并联电阻的双调谐滤波器的元件参数特新,比较两种滤波器的元件参数对谐振频率灵敏度影响,确定了带有并联电阻的双调谐滤波器元件参数变化对系统影响明显优于普通双调谐滤波器。

Primary Research on HVDC WAN Grounding Electrode

The double--tuned filter is widely used in HVDC system. Double--tuned filter can get a better capability of high-pass and reduce the possibility of resonance between filters and other filters,the system by which making resistance parallel with it,but the method may increase the impedanced between the two series resonance and the harmonic meritorious loss of the whole filter. Through the analysis of the double--tuned filter and the double tuned with parallel resistance of the filter＇s new device parameters,comparing the two filter device parameters on resonance frequency sensitivity effect,determine the double with parallel resistance device parameters tuned filter impact on the system change significantly better than ordinary double--tuned filter.