Multiphysics Analysis on KYN61-40.5kV High Voltage Switchgear and Study of Insulation Test of Component

TANG Qiang; YANG Yi; WEI Miao; JIANG Tong; JIA Shenli; KANG Xiaoning; WEI Chunyan

doi:10.13296/j.1001-1609.hva.2021.12.005

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Multiphysics Analysis on KYN61-40.5kV High Voltage Switchgear and Study of Insulation Test of Component

更新时间：2025-04-26

- Multiphysics Analysis on KYN61-40.5kV High Voltage Switchgear and Study of Insulation Test of Component
- High VoltageApparatus Vol. 57, Issue 12, Pages: 33-41(2021)
- 作者机构：
  
  1. 西安交通大学电气工程学院
  2. 陕西省地方电力榆林电力分公司
  3. 陕西省地方电力西安供电分公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2021.12.005
  CLC： TM591
- Published：2021
- 稿件说明：
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TANG Qiang, YANG Yi, WEI Miao, et al. Multiphysics Analysis on KYN61-40.5kV High Voltage Switchgear and Study of Insulation Test of Component[J]. High voltageapparatus, 2021, 57(12): 33-41.
DOI：

TANG Qiang, YANG Yi, WEI Miao, et al. Multiphysics Analysis on KYN61-40.5kV High Voltage Switchgear and Study of Insulation Test of Component[J]. High voltageapparatus, 2021, 57(12): 33-41. DOI： 10.13296/j.1001-1609.hva.2021.12.005.

摘要

榆林地区的110 kV变电站发生多起KYN61-40.5kV开关柜内绝缘件击穿、带电导体对地放电等故障。通过现场调查

发现开关柜面板内侧有水珠挂壁

触头盒内部有积水。检修过程中还发现触头盒靠近电缆室的出线口附近有击穿痕迹

击穿的原因有待探究。针对多起事件开关柜内发现的凝露和积水现象

建立了三维仿真模型

通过计算柜内的气流场和湿度场

找出凝露的原因和易凝露的部位。对提出的风机除潮措施进行了仿真验证

计算了多种凝露条件下的电场分布

并针对易凝露积水的触头盒进行了绝缘耐压试验。最后

结合仿真和试验的研究结果

提出防治此类开关柜事故的方案。

Abstract

Multiple such faults as breakdown of insulation parts and discharge of live conductor to the ground in type KYN61-40.5kV switchgear cabinet at 110 kV substation in Yulin area

China. It is found through investigation at site that there are water droplets on the inner side of the switchgear cabinet and accumulated water in the contact box.Moreover

it is still found during the maintenance process that there is breakdown traces near the outlet of the contact box near the cable room and the cause of the breakdown needs to be explored. Aiming at the condensation and water accumulation phenomenon found in the switchgear cabinet

a three-dimensional simulation model is set up

and the cause for the condensation and the position prone to condensation are found by way of calculating the airflow field and humidity field inside the cabinet. The proposed moisture removal measures of the fan is simulated and verified. The electric field distribution under various condensation conditions is simulated. The insulation withstand voltage test is conducted for the contact box which is prone to condensation. Finally

the scheme to prevent the fault of such switchgear cabinet is proposed in combination with the study result of both simulation and test.

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