Electric Power ›› 2023, Vol. 56 ›› Issue (7): 125-135.DOI: 10.11930/j.issn.1004-9649.202203093

• Power System • Previous Articles     Next Articles

Inherent Characteristics Analysis and Optimal Application Scenarios of Type-C Damped Filter

LIU Ke1, YANG Fangnan2, WANG Yang3, LI Jianwu2, WANG Xin4, YAN Han1, WANG Xuan1, CHEN Pengfei3   

  1. 1. State Grid Qinghai Electric Power Research Institute, Xining 810000, China;
    2. State Grid Qinghai Electric Power Company, Xining 810001, China;
    3. College of Electrical Engineering, Sichuan University, Chengdu 610065, China;
    4. CEIEC Shenzhen Electric Technology Inc., Shenzhen 518040, China
  • Received:2022-03-28 Revised:2022-12-02 Accepted:2022-06-26 Online:2023-07-23 Published:2023-07-28
  • Supported by:
    This work is supported by Science and Technology Project of Qinghai Electric Power Company (Resonance Analysis and Elimination Technology Research and Application of 35 (10) kV Ungrounded System in Typical Substation of Qinghai Power Grid, No.52280720002Q), National Natural Science Foundation of China (Study on Dynamic Process Characterization and Instability Mechanism of Harmonic Oscillation in AC/DC System Under Transient Disturbance Excitation, No.52177104).

Abstract: Passive filter is extensively used in new power systems because of its mature technology and low cost, and two types of high pass (HP) filters, i.e. the second-order HP filter and type-c damped filter, are widely used for harmonic treatment However, the existing researches cannot yet clearly reveal the characteristics of each type of filters, which makes it difficult for the designer to select the optimal filter topology under different circumstances. As a result, this paper provides a deep insight into the topological characteristics of the two types of HP filters with focus on the influence of system voltage on the filter cost, and summarizes the inherent characteristics of the two type of HP filters and their optimal application scenarios. Universal conclusions are reached in the paper, which are applicable to different voltage levels ranging from low voltage to high voltage, and helpful to solve the problem of filter topology selection and guide the design of filter packages.

Key words: passive filter, second-order HP filter, type-C damped filter, filter topology, filter package