Distribution Characteristics of Electromagnetic Forces in Windings of Thyristor-controlled Phase Shifters Under Typical Fault Conditions

CAI Xiang; YAO Yongle; LI Qun; CHEN Shi; WANG Tonglei; PANG Lei

doi:10.13296/j.1001-1609.hva.2026.09.021

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Distribution Characteristics of Electromagnetic Forces in Windings of Thyristor-controlled Phase Shifters Under Typical Fault Conditions

Simulation and Analysis of Thermal and Electromagnetic Characteristics of Power Equipment | 更新时间：2026-09-10

- Distribution Characteristics of Electromagnetic Forces in Windings of Thyristor-controlled Phase Shifters Under Typical Fault Conditions
- High Voltage Apparatus Vol. 62, Issue 9, Pages: 209-220(2026)
- 作者机构：
  
  西安交通大学电气工程学院，西安 710049
  国网江苏省电力有限公司电力科学研究院，南京 211103
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.09.021
  CLC：
- Received：08 April 2026，
  
  Revised：2026-06-20，
  
  Published：16 September 2026
- 稿件说明：
移动端阅览
CAI Xiang, YAO Yongle, LI Qun, et al. Distribution Characteristics of Electromagnetic Forces in Windings of Thyristor-controlled Phase Shifters Under Typical Fault Conditions[J]. High Voltage Apparatus, 2026, 62(9): 209-220.
DOI：

CAI Xiang, YAO Yongle, LI Qun, et al. Distribution Characteristics of Electromagnetic Forces in Windings of Thyristor-controlled Phase Shifters Under Typical Fault Conditions[J]. High Voltage Apparatus, 2026, 62(9): 209-220. DOI： 10.13296/j.1001-1609.hva.2026.09.021.

摘要

晶闸管控制移相器磁路耦合复杂，系统故障时电磁力冲击是威胁移相器绕组可靠性的关键因素。文中在移相器绕组典型外部故障时电磁暂态特性分析基础上，建立移相器绕组电磁力计算模型，研究了故障下移相器漏磁场和电磁力分布特性，分析了并联变压器档位和绕组排布顺序对电磁力分布特性的影响。结果表明：对于串联变压器，在并联变压器网侧单相接地故障下辐向和轴向电磁力最大值分别出现在绕组约1/5和1/2处，分别达到587.8 kN和994.8 kN，在外部线路单相接地故障下辐向和轴向电磁力最大值分别出现在绕组约1/2处和端部，分别达到441.5 kN和938.9 kN，电磁力在故障发生后数个周期内保持较大值，并与电流保持同步衰减；对于并联变压器，两种故障工况下电磁力分布类似，辐向和轴向电磁力最大值分别出现在绕组1/3～1/2处和绕组端部，电磁力在故障发生后集中分布在第一个周期；移相器档位变化与并联变压器绕组顺序不同均会改变漏磁场分布，进而影响电磁力，档位变化可导致电磁力最大值相差达14 kN，而优化绕组排列顺序可使电磁力合力最大值降幅接近50%。文中研究成果为移相器结构优化提供了参考，对工程应用具有重要指导意义。

Abstract

The thyristor-controlled phase shifter exhibits complex magnetic circuit coupling and

in case of system fault

the electromagnetic force impulse poses a major threat to the reliability of its windings. Based on the electromagnetic transient characteristics analysis of the phase shifter windings under typical external faults

in this paper an electromagnetic force calculation model for the phase shifter windings is setablished

the leakage magnetic field and electromagnetic force distribution characteristics of the phase shifter under fault conditions is investigated

and the effects of the parallel transformer tap position and winding arrangement sequence on the electromagnetic force distribution charcateristics are analyzed. The results show that for the series transformer

under the grid-side single-phase grounding fault of the parallel transformer

the maximum radial and axial electromagnetic forces appear at about 1/5 and 1/2 of the winding

reaching 587.8 kN and 994.8 kN respectively. In case of single-phase grounding fault on the external line

the maximum radial and axial electromagnetic forces appear at about 1/2 of the winding and the end of the winding

reaching 441.5 kN and 938.9 kN respectively. The electromagnetic forces maintain a large value within several cycles after the fault occurrence and decay synchronously with the current.For the parallel transformer

the electromagnetic force distribution is similar under the two fault conditions. The maximum values of the radial and axial electromagnetic forces appear at 1/3~1/2 of the winding and the end of the winding

respectively. The electromag netic force is concentrated in the first cycle after the occurrence of fault. Variations in the phase shifter's tap position and differences in the winding sequence of the parallel transformer both alter the leakage magnetic field distribution

thereby affecting the electromagnetic forces. Change in the tap position can result in a maximum electromagnetic force difference of up to 14 kN

while optimizing the winding arrangement sequence can reduce the maximum electromagnetic forec eby nearly 50%. The research in this paper provides a reference for optimizing phase shifter structures and has important guiding significance for engineering applications.

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