Simulation Study on Lightning Overvoltage Characteristics of±500 kV DC Filter

ZHANG Yaoyue

doi:10.14044/j.1674-1757.pcrpc.2025.06.002

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Simulation Study on Lightning Overvoltage Characteristics of±500 kV DC Filter

POWER CAPACITOR & REACTIVE POWER COMPENSATION | Reactive Power Compensation and Filter

Simulation Study on Lightning Overvoltage Characteristics of±500 kV DC Filter
±500 kV直流滤波器雷电过电压特性仿真研究
ANU College of Business and Economics，Canberra 2600，Australia
Vol. 46, Issue 6, Pages: 9-18(2025)
DOI：10.14044/j.1674-1757.pcrpc.2025.06.002
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ZHANG Yaoyue. Simulation Study on Lightning Overvoltage Characteristics of±500 kV DC Filter[J]. Power Capacitor & Reactive Power Compensation, 2025, 46(6): 9-18.
DOI：

ZHANG Yaoyue. Simulation Study on Lightning Overvoltage Characteristics of±500 kV DC Filter[J]. Power Capacitor & Reactive Power Compensation, 2025, 46(6): 9-18. DOI： 10.14044/j.1674-1757.pcrpc.2025.06.002.

摘要

直流输电线路在雷击工况下，会引起换流站中性区域产生过电压，极大的影响和威胁中性区域设备特别是直流滤波器安全稳定运行。文章针对某±500 kV换流站直流双极大地回线全压运行方式极ⅡHP12/36直流滤波器典型故障过电压及其特性，搭建电磁暂态仿真模型开展过电压特性研究，得出该过电压是介于工频过电压和操作过电压之间的非标准类工频过电压的结论，并结合这一论断，分析了爬距计算电压、雷电耐受电压和操作耐受电压等因素对过电压的影响，提出了直流滤波器及其支柱绝缘子设备选型要求，对滤波器、避雷器暂态额定值选择、关键参数优化具有参考和借鉴意义。

Abstract

Under lightning strike conditions，direct current transmission lines can cause overvoltage in the neutral area of converter station，greatly affecting and threatening the safe and stable operation of equipment（with DC filters in particular）of neutral area. In this paper an electromagnetic transient simulation model is set up to investigate overvoltage characteristics，fousing on a typical fault overvoltage event and its properties in the pole II HP12/36DC filter in the full-voltage operation mode of the DC bipolar ground return system at a ±500 kV converter station. It is concluded that the overvoltage is a non-standard type of power frequency overvoltage between power frequency overvoltage and operating overvoltage. Based on this conclusion，the influence of such factors as creepage distance calculated voltage，lightning withstand voltage and operating withstand voltage on overvoltage is analyzed，The type selection requirements for DC filters and their supporting insulator are proposed. This has reference and inspiration value for the selection of transient rated values and key parameter optimization of filters and lightning arresters.

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references

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