Research on the Gas Protection Performance Under External Short-circuit Faults

ZHOU Dan; LI Zhengyuan; SUN Wenxing; LIN Chunyao; YANG Xian; HAO Zhiguo

doi:10.13296/j.1001-1609.hva.2019.01.019

您当前的位置：

首页 >

文章列表页 >

Research on the Gas Protection Performance Under External Short-circuit Faults

更新时间：2025-04-26

- Research on the Gas Protection Performance Under External Short-circuit Faults
- High VoltageApparatus Vol. 55, Issue 1, Pages: 120-127+134(2019)
- 作者机构：
  
  1. 广东电网有限责任公司电力科学研究院
  2. 西安交通大学电力设备与电气绝缘国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2019.01.019
  CLC： TM407
- Published：2019
- 稿件说明：
移动端阅览
[1]周丹,李正圆,孙文星,林春耀,杨贤,郝治国.外部短路冲击下瓦斯保护动作性能研究[J].高压电器,2019,55(01):120-127+134.

ZHOU Dan, LI Zhengyuan, SUN Wenxing, et al. Research on the Gas Protection Performance Under External Short-circuit Faults[J]. High voltageapparatus, 2019, 55(1): 120-127+134.
[1]周丹,李正圆,孙文星,林春耀,杨贤,郝治国.外部短路冲击下瓦斯保护动作性能研究[J].高压电器,2019,55(01):120-127+134. DOI： 10.13296/j.1001-1609.hva.2019.01.019.

ZHOU Dan, LI Zhengyuan, SUN Wenxing, et al. Research on the Gas Protection Performance Under External Short-circuit Faults[J]. High voltageapparatus, 2019, 55(1): 120-127+134. DOI： 10.13296/j.1001-1609.hva.2019.01.019.

摘要

作为变压器的非电量主保护

瓦斯保护动作可靠性一直处于较低水平。近年来

外部短路冲击下瓦斯继电器误动跳闸的事故屡次发生

威胁变压器运行效率。为揭示瓦斯保护误动的本质原因

从绕组发热和振动入手

仿真研究了短路穿越电流对变压器内部油流和瓦斯保护的影响。为研究短路电流热效应对变压器内部油流的影响

采用有限体积法仿真计算了外部故障状态下变压器内部热场与流场耦合作用下的散热过程及流场变化。为分析绕组振动对油流的影响

仿真计算了外部短路情况下绕组的动态电磁力及振动位移

考虑流固耦合作用

计算求解了绕组振动引起的流场变化。结果表明

部件发热对变压器内部油流的驱动是持续性的

但短路电流的热效应对油流的驱动尚不足以引起瓦斯保护误动;绕组振动对油流的冲击更强烈且迅速

可能导致瓦斯保护误动。外部短路冲击下变压器的瞬态热场及流场的仿真计算分析在国内外均属首次开展

相关研究方法及结果可为瓦斯保护性能改进及提高提供参考依据。

Abstract

As the main non-electricity protection of power transformers

gas protection is not reliable enough. Themaloperation accident of gas protection occurs frequently during external short-circuit faults in recent years

whichdamages operation efficiency of transformers. Two factors which may result in the oil surging

namely heating and vi-bration of transformer components

are considered to analyze the influence of external short-circuit current on gasprotection. The simulation of heat generating and dissipating in the transformers under the fault state is conducted bythe flow field analysis method based on the finite volume method（FVM）

and the simulation of the winding vibrationeffect on transformer oil is also conducted. The results show that transformer oil flow is driven continuously but notdrastically by the heat generated during the external short-circuit fault. The heat effect of external short-circuit faultsis not strong enough to lead to maloperation of gas protection. However

the winding vibration resulted from externalshort-circuit current has more drastic and rapid influence on transformer oil flow

which may lead to maloperation of gas relay.

关键词

Keywords

references

Views

129

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Combined Detection Technology of Trace Acetylene Gas Photothermal Interference and Multi-harmonic Signal

Simulation Study on Thermal and Electric Field of Saturable Reactor for ±500 kV Converter Valve

FINITE ELEMENT ANALYSIS OF COUPLED MAGNETO-THERMAL FIELDS FOR COMPACT BUSBAR TRUNKING SYSTEM

Numerical Simulation of Plasma in DC Electric Arc Furnace

Insulation Condition Evaluation of 750 kV Power Transformers Based on Frequency Domain Spectroscopy

Related Author

WANG Chao

PAN Xingya

QIAO Ruixun

ZHOU Yang

SHAO Jianwei

GUAN Ruiyang

ZHU Zhengyi

JIA Zhidong

Related Institution

School of Electrical and Automation, Wuhan University

Guangdong Engineering Technology Research Centre of Power Equipment Reliability in Complicated Coastal Environments, Tsinghua Shenzhen International Graduate School

State Grid Shanghai Electric Power Company

西安交通大学电气工程学院陕西西安710049

Xi’an Jiaotong University

⁰