Ferromagnetic Resonance Elimination Method on PT of Distribution Network Using Gap and Resistor in Series

YANG Xin; CHEN Xingang; SUN Haotian; DING Xuehui

doi:10.14044/j.1674-1757.pcrpc.2022.05.013

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Ferromagnetic Resonance Elimination Method on PT of Distribution Network Using Gap and Resistor in Series

更新时间：2024-09-21

- Ferromagnetic Resonance Elimination Method on PT of Distribution Network Using Gap and Resistor in Series
- POWER CAPACITOR & REACTIVE POWER COMPENSATION Vol. 43, Issue 5, Pages: 84-93(2022)
- 作者机构：
  
  长沙理工大学
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2022.05.013
  CLC： TM451
- Published：2022，
- 稿件说明：
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YANG XIN, CHEN XINGANG, SUN HAOTIAN, et al. Ferromagnetic Resonance Elimination Method on PT of Distribution Network Using Gap and Resistor in Series. [J]. Power capacitor & reactive power compensation, 2022, 43(5): 84-93.
DOI：

YANG XIN, CHEN XINGANG, SUN HAOTIAN, et al. Ferromagnetic Resonance Elimination Method on PT of Distribution Network Using Gap and Resistor in Series. [J]. Power capacitor & reactive power compensation, 2022, 43(5): 84-93. DOI： 10.14044/j.1674-1757.pcrpc.2022.05.013.

摘要

配电网母线电磁式电压互感器（PT）高压侧中性点加装非线性电阻或高阻值电阻等消谐方法会导致PT末端的电压升高，开口三角零序电压过低等问题，本文提出在母线PT高压侧中性点加装间隙与阻尼电阻串联组合的消谐方法。以10 kV母线PT为应用对象，利用电磁暂态分析软件搭建了10 kV配电网分布参数电路模型，给出了间隙和电阻的选型原则，得到了间隙的放电电压和电阻的最佳取值。利用仿真模型，将PT一次侧加装间隙与电阻串联的消谐方法与加装高阻值电阻、非线性电阻进行了综合比较。结果表明，本文所提方法具有消谐时间短、PT末端电压水平低、不影响PT开口三角零序电压测量以及接地点容性电流小的特点，具有更好的综合消谐效果。

Abstract

Such harmonic elimination methods as installation of nonlinear resistors or high-resistance resistors to the neutral point of the high-voltage side of the bus electromagnetic voltage transformer（PT）of distribution network will cause such issues as voltage swell at the PT end and low open triangle zero sequence voltage. A harmonic elimination method of installing a gap and a damping resistor in series at the neutral point of the high-voltage side of the bus PT is proposed in this paper. The 10 kV bus PT is taken as the application object

the distributed parameter circuit model of the 10 kV distribution network is set up by using electromagnetic transient analysis software

the selection principles of the gap and resistoris given

thus

the optimal values of the discharge voltage and resistance of the gap are obtained. The harmonic elimination method of installing gap and resistor in series on the primary side of PT is comprehensively compared with that of installing the high resistance and nonlinear resistor by the use of the simulation model. The results show that the method proposed in this paper has such characteristics as short harmonic elimination time

low voltage level of the PT end

free from open triangle zero sequence voltage measurement of the PT and small capacitive current of the grounding point and has better harmonic elimination effect as well.

关键词

配电网电压互感器铁磁谐振间隙分布参数

Keywords

distribution networkvoltage transformerferromagnetic resonancegapdistribution parameter

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