在气体绝缘开关装置中,环境友好的绝缘介质的交流电分解和分解产品检测特征
Shuai Du1, Xian Cheng2, Guowei Ge1
1School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou, 450001, China.
Scientific reports
|August 22, 2024
概括
研究了用于气体绝缘开关装置 (GIS) 的硫六化物 (SF6) 的环保替代品. C4F7N/CO2混合物,干空气和CO2显示出作为绝缘介质的潜力,其特定的介电强度根据各种条件确定.
科学领域:
- 电气工程 电气工程
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 六化硫 (SF6) 是一种强大的温室气体,广泛用于气体绝缘开关设备 (GIS).
- 由于环境问题,全球迫切需要为SF6提供环保替代品.
- 在GIS中,对潜在的SF6替代物的介电特性和分解产品分析的研究有限.
研究的目的:
- 评估C4F7N/CO2混合物,干空气和CO2作为GIS中的环保替代品的绝缘性能.
- 在不同的电极配置和气体压力下确定交流电断电压特征.
- 在不同的缺陷条件下检测和分析干空的部分排放 (PD) 分解产物.
主要方法:
- 使用一个缩小规模的气体绝缘实验装置.
- 研究了不同电极和间隙距离的交流断裂电压与气体压力.
- 进行部分放电实验,以在模拟缺陷类型 (金属突出,空气隙,金属污染) 下识别干燥空气中的分解产物.
主要成果:
- 7% C4F7N/93% CO2,0.9 MPa 的干空气和0.9 MPa 的 CO2 的 0.6 MPa 显示出适用于环保 GIS 的绝缘介质.
- 干燥空气的分解产物 (CO2,CO,NO2) 与应用于电压和时间线性增加.
- 部分排放缺陷可以根据CO2,CO和NO2度的比率来区分.
结论:
- C4F7N/CO2混合物,干空气和CO2是GIS绝缘的可行的环保替代品.
- 该研究为开发新的环保气体绝缘开关设备提供了基础.
- PD分解产物分析提供了一种用于诊断干空绝缘GIS缺陷的方法.
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