论文部分内容阅读
双调谐滤波器和三调谐滤波器具有占地少、减少高压电感和电容元件、节省开关等诸多优点,已经在直流输电工程中得到广泛应用。但是现有的多调谐阻尼型滤波器用于低次谐波滤波时,滤波器的基波损耗过大。文中介绍了一种低损耗的阻尼型双调谐滤波器和三调谐滤波器电路,其基本思路是使滤波电路的部分LC元件构成基波串联调谐电路,并使并联阻尼电阻连接在基波调谐电路的两端,从而避免阻尼电阻上的基波功率损耗。新滤波器用在高压直流输电系统中将节省运行成本。
Dual tuned filters and triple tuned filters have the advantages of small footprint, reduced high-voltage inductances and capacitive components, and many other advantages such as switch saving. They have been widely used in DC transmission projects. However, when the existing multi-tuned damping filter is used for low-order harmonic filtering, the fundamental loss of the filter is too large. In this paper, a low-loss damping double tuned filter and a tri-tuned filter circuit are introduced. The basic idea is to make some of the LC components of the filter circuit form a series tuning circuit of the fundamental wave and connect the parallel damping resistor to the fundamental tuning circuit In order to avoid the fundamental power loss on the damping resistor. New filter used in HVDC transmission system will save operating costs.