Research on analysis of load voltage harmonic characteristics and harmonic suppression strategy of magnetron resonant transformer

QIN Yufan; TIAN Cuihua; CHEN Yaojun; CHEN Baichao; ZHANG Chenmeng; ZHOU Jinhai

doi:10.14188/j.1671-8844.2024.0018

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Research on analysis of load voltage harmonic characteristics and harmonic suppression strategy of magnetron resonant transformer

更新时间：2026-10-16

- Research on analysis of load voltage harmonic characteristics and harmonic suppression strategy of magnetron resonant transformer
- Engineering Journal of Wuhan University Pages: 1-10(2026)
- 作者机构：
  
  1.电网环境保护全国重点实验室，武汉大学电气与自动化学院，武汉 430072
  2.国网四川省电力公司电力科学研究院，成都 610072
  3.国网湖北省电力有限公司检修公司，武汉 430050
- 作者简介：
- 基金信息：
- DOI：10.14188/j.1671-8844.2024.0018
  CLC： TM 47
- Online First：16 October 2026，
- 稿件说明：
移动端阅览
QIN Yufan, TIAN Cuihua, CHEN Yaojun, et al. Research on analysis of load voltage harmonic characteristics and harmonic suppression strategy of magnetron resonant transformer[J/OL]. Engineering Journal of Wuhan University, 2026, 1-10.
DOI：

QIN Yufan, TIAN Cuihua, CHEN Yaojun, et al. Research on analysis of load voltage harmonic characteristics and harmonic suppression strategy of magnetron resonant transformer[J/OL]. Engineering Journal of Wuhan University, 2026, 1-10. DOI： 10.14188/j.1671-8844.2024.0018.

摘要

在交流耐压试验中，磁控谐振变压器（Magnetic Controlled Resonant Transformer

MCRT）通过调节励磁电感，与试品电容发生并联谐振检测设备缺陷，控制简单，结构紧凑，输出电压稳定。由于在励磁过程中会产生谐波电流影响输出电压的波形质量，为此建立了MCRT试验系统的等效模型，分析了负载电压谐波在全负载范围内的变化特性，得到了负载电压畸变的主要原因是MCRT产生的谐波电流在供电电源的输出阻抗及MCRT的漏抗上产生了压降；提出了在系统输入端串联注入谐波电压抵消谐波压降的方法，采用了谐振控制策略对注入的谐波电压进行控制，并通过Simulink建立容量为350kV/1A的MCRT试验系统仿真模型，验证了谐波补偿策略的可行性，为试验系统的实物化提供了参考。

Abstract

During AC withstand testing

the Magnetic Controlled Resonant Transformer (MCRT) is utilized to detect defects in test samples by engaging in parallel resonance with the sample capacitor

facilitated by adjusting the excitation inductance. This method offers straightforward control

a compact structure

and maintains stable output voltage. However

the excitation process generates harmonic currents

impacting waveform quality and causing voltage distortion. To address this issue

an equivalent model of the MCRT test system is developed to analyze the variation of load voltage harmonics across the full load range. It is observed that the main cause of load voltage distortion arises from harmonic currents produced by the MCRT

leading to voltage drops across the output impedance of the power supply and leakage reactance of the MCRT. To mitigate these effects

a method of injecting harmonic voltage at the system input to counteract the harmonic voltage drop is proposed. This involves employing resonance control strategies to regulate the injected harmonic voltage. Through simulation using a 350KV/1A capacity MCRT test system model in Simulink

the feasibility of the harmonic compensation strategy is verified

providing valuable insights for the practical implementation of the test system.

关键词

Keywords

references

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