Simulation Analysis on Stress and Vibration Characteristics of 500 kV Connected Transformer Core in Harmonic Condition

HUANG Zhiming; WANG Qiao; ZHANG Yifan; JING Yi; FU Mingli; ZHUO Ran; LUO Yan; GAO Feng; NING Wenjun

doi:10.13296/j.1001-1609.hva.2019.11.012

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Simulation Analysis on Stress and Vibration Characteristics of 500 kV Connected Transformer Core in Harmonic Condition

更新时间：2025-04-26

- Simulation Analysis on Stress and Vibration Characteristics of 500 kV Connected Transformer Core in Harmonic Condition
- High VoltageApparatus Vol. 55, Issue 11, Pages: 86-92(2019)
- 作者机构：
  
  1. 南方电网科学研究院有限责任公司
  2. 华南理工大学
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2019.11.012
  CLC： TM41
- Published：2019
- 稿件说明：
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[1]黄之明,王乔,张逸凡,景一,傅明利,卓然,罗颜,高峰,宁文军.谐波条件下500 kV联接变压器铁心应力及振动特性仿真分析[J].高压电器,2019,55(11):86-92.

HUANG Zhiming, WANG Qiao, ZHANG Yifan, et al. Simulation Analysis on Stress and Vibration Characteristics of 500 kV Connected Transformer Core in Harmonic Condition[J]. High voltageapparatus, 2019, 55(11): 86-92.
[1]黄之明,王乔,张逸凡,景一,傅明利,卓然,罗颜,高峰,宁文军.谐波条件下500 kV联接变压器铁心应力及振动特性仿真分析[J].高压电器,2019,55(11):86-92. DOI： 10.13296/j.1001-1609.hva.2019.11.012.

HUANG Zhiming, WANG Qiao, ZHANG Yifan, et al. Simulation Analysis on Stress and Vibration Characteristics of 500 kV Connected Transformer Core in Harmonic Condition[J]. High voltageapparatus, 2019, 55(11): 86-92. DOI： 10.13296/j.1001-1609.hva.2019.11.012.

摘要

在交直流混合互联大电网运行方式下

发现柔性直流与交流系统间发生的谐振具有高频次、宽频域的新特性。为研究谐波注入对500 kV联接变压器铁心振动的影响

通过建立联接变压器绕组、铁心电磁—结构力场有限元模型

考虑铁心磁致伸缩及洛伦兹力的作用

仿真计算得到变压器铁心磁通密度、应力分布、振动位移和加速度。对比分析基波及含谐波激励工况下的仿真结果表明

谐波注入前后铁心磁通分布无明显变化;谐波注入后

铁心上应力分布出现明显变化

且最大应力增加两个数量级;基波激励下最大振动频率为100 Hz

高次谐波注入后最大振动出现在2 500 Hz附近。研究结果为联接变压器振动噪声的预测及优化设计提供了参考。

Abstract

The resonance between VSC-HVDC and HVAC systems has the new characteristics of high frequency and wide frequency domain. In order to study the effect of harmonic injection on the vibration of a 500 kV connected transformer core

a finite element model of electromagnetic-structural force field is established for the winding and core of the connected transformer. Considering the effects of magnetostriction and Lorentz force

the magnetic flux density

stress distribution

vibration displacement and acceleration of the transformer core are obtained through simulation calculation. Simulation results in the condition of fundamental frequency and harmonic show that: 1) the magnetic flux distribution of the transformer core does not change significantly before and after harmonic injection;2) after harmonic injection

the stress distribution of the core changes obviously

and the maximum stress increases by two orders of magnitude;and 3) the maximum vibration frequency under fundamental frequency is 100 Hz

and the maximum vibration appears around 2500 Hz after high-order harmonic injection.

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