C型滤波器全频域滤波效果的元件参数影响规律研究

Research on the Influence Law of Component Parameters of C-type Filter′s Filtering Effect in the Entire Frequency Domain

随着非线性设备/负荷的大量接入,电力系统的谐波问题日益严重。无源滤波器作为一种高性价比的谐波抑制设备,被广泛应用于电力系统的谐波治理。其中,C型滤波器以其低基波功率损耗、高通滤波特性和调谐等优点被广泛采用。通过引入电容比例参数,推导了C型滤波器的等效阻抗和等效电抗的数学表达式,进而分析了元件参数变化对C型滤波器全频域下滤波效果的影响规律。通过IEEE 14节点标准测试系统验证了理论推导和分析方法的正确性,所得元件参数影响规律可为C型滤波器参数设计提供有益指导。

With the massive access of non-linear equipments and loads,the harmonic problem of power system is more and more serious.As a cost-effective harmonic suppression equipment,passive filters are widely used in power system harmonic control.Among them,the C-type filter is widely adopted due to its low fundamental power loss,high-pass filtering and tuning characteristic.By introducing the capacitance ratio parameter,the mathematical expressions of equivalent impedance and reactance of the C-type filter are derived.Based on these,the influence of component parameter changes on the filtering effect in the entire frequency domain is analyzed.Finally,the correctness of the theoretical derivation and analysis of this paper is verified by the IEEE 14-node standard test system.The influence law of component parameters can provide guidance for the design of C-type filter.