Study of the Influence of Electric Field Distribution and Turns Deviation Transient Electrodynamic Force on Dry-type Air-core Shunt Reactor

WU Yanlin; TAN Xiangyu; MA Yi; WANG Ke; QIAN Guochao; ZHANG Xuan; WANG Yan; GUO Xiaobing; WANG Yonghong

doi:10.13296/j.1001-1609.hva.2016.10.017

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Study of the Influence of Electric Field Distribution and Turns Deviation Transient Electrodynamic Force on Dry-type Air-core Shunt Reactor

更新时间：2025-04-26

- Study of the Influence of Electric Field Distribution and Turns Deviation Transient Electrodynamic Force on Dry-type Air-core Shunt Reactor
- High VoltageApparatus Vol. 52, Issue 10, Pages: 99-107(2016)
- 作者机构：
  
  1. 昆明理工大学
  2. 云南电网有限责任公司电力科学研究院
  3. 哈尔滨理工大学电气与电子工程学院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2016.10.017
  CLC： TM472
- Published：2016
- 稿件说明：
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[1]吴彦霖,谭向宇,马仪,王科,钱国超,张轩,王岩,郭小兵,王永红.电场分布以及匝数偏差暂态电动力对干式空心并联电抗器影响的研究[J].高压电器,2016,52(10):99-107.

WU Yanlin, TAN Xiangyu, MA Yi, et al. Study of the Influence of Electric Field Distribution and Turns Deviation Transient Electrodynamic Force on Dry-type Air-core Shunt Reactor[J]. High voltageapparatus, 2016, 52(10): 99-107.
[1]吴彦霖,谭向宇,马仪,王科,钱国超,张轩,王岩,郭小兵,王永红.电场分布以及匝数偏差暂态电动力对干式空心并联电抗器影响的研究[J].高压电器,2016,52(10):99-107. DOI： 10.13296/j.1001-1609.hva.2016.10.017.

WU Yanlin, TAN Xiangyu, MA Yi, et al. Study of the Influence of Electric Field Distribution and Turns Deviation Transient Electrodynamic Force on Dry-type Air-core Shunt Reactor[J]. High voltageapparatus, 2016, 52(10): 99-107. DOI： 10.13296/j.1001-1609.hva.2016.10.017.

摘要

为了研究干式空心并联电抗器绝缘开裂、树枝状放电导致的干式空心电抗器匝间短路事故

文中采用Ansys场—路耦合有限元分析方法

对一台BKDK-20000/35大型电抗器建立仿真模型

通过对干式空心并联电抗器进行电场分布仿真并对电动力数值解析

讨论了因匝数偏差对该电抗器绝缘被破坏的可能性。研究结果表明:内部绝缘匝间电场最大场强比包封端部高;根据计算匝间场强最大值

气隙场强达到2.04 kV/mm

足以发生沿面放电;发现投入电抗器时的暂态电动力增大

并且接近稳态电动力的4倍;匝数偏差造成有偏差层线圈投入暂态电动力的相位发生横向改变

电动力最大值也明显增加。因沿面放电和暂态电动力对匝间绝缘材料起老化和破坏作用

因此会造成干式空心电抗器匝间短路事故

这为干式空心电抗器的事故分析提供依据。

Abstract

In order to study the inter-turn short circuit accident of dry type air core reactor

which is caused by insulation cracking and branch discharge of dry type air core shunt reactor

this paper using Ansys field circuit coupled finite element analysis method

a BKDK-20000/35 large reactor simulation model is established

through the simulation of the electric field distribution and the numerical analysis of the electrodynamic force for dry-type air-core shunt reactor

the insulation destroyed possibility caused by inter-turns deviation of the reactor is discussed. The results show that the maximum electric field strength in internal insulation inter-turn is higher than that in packet blocking. According to the calculation value of inter-turn maximum electric field strength

the air gap field strength reaches 2.04 kV/mm

which is sufficient to occur the surface discharge. It is found that the transient electrodynamic force increases when the reactor is input

and it is close to 4 times of the steady state electrodynamic force.Turns deviation will cause the phase lateral changed of the transient electrodynamic force in the deviation layer coil

the maximum value of the transient electrodynamic force is also increased significantly. The surface discharge and the transient electrodynamic force will be aging and failure to inter-turn insulation material. Therefore

it will cause the inter-turn short circuit accident of drytype air-core reactor

which provides the basis for the accident analysis of dry-type air-core reactor.

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