摘要
多调谐滤波器在电路拓扑结构上通常由一个串联支路和多个并联支路组成。在实际工程应用时,受周围环境及系统运行工况随机变化的影响,串并联支路一般会存在一定程度上的参数摄动,从而削弱了其应有的谐波抑制效果。文章介绍了几类目前HVDC工程应用中常见的多调谐滤波器结构型式,分析了其阻抗频率特性及其所存在的运行损耗特性。在此基础上,详细阐述了串联支路与并联支路受不同程度参数摄动的影响时,其表征出来的多调谐滤波器失谐程度及其对滤波效果的影响程度,总结了其演变规律,对多调谐滤波器在HVDC交直流系统中的有效稳定运行及滤波参数的整定具有一定的工程实用价值和参考意义。
In general the circuit topology of multi-tuned filter consists of one series branch and multi-parallel branches. When multi-tuned filter is put into operation, due to the influences of random variation of both ambient environment and system operating conditions, there will be parameter perturbation in series and parallel branches, thus its due harmonic suppression effect is weakened. In this paper the common structural forms of several kinds of multi-tuned filters, which are used in HVDC power transmission projects, are presented, their impedance frequency characteristics as well as existing loss characteristics in operation are analyzed. On this basis, when series and parallel branches are impacted by parameter perturbation in different extent, the characterized detuniug extent of multi-tuned filter and the influence extent of parameter perturbation on filtering effect are expounded, and its evolution law is summarized. These analysis results possess a certain practical engineering value and are available for reference in effective and stable operation of multi-tuned filters in hybrid AC/DC transmission system and the setting of filtering parameters.
出处
《电网技术》
EI
CSCD
北大核心
2008年第4期52-55,66,共5页
Power System Technology
关键词
高压直流输电
多调谐滤波器
参数摄动
HVDC power transmission
multi-tuned filter
parameter perturbation
