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发明公开
CN106442925A 一种特高压电网含缺陷GIS壳体的寿命评估方法 有权

一种特高压电网含缺陷GIS壳体的寿命评估方法
摘要：
本发明公开了一种特高压电网含缺陷GIS壳体的寿命估计方法。目前对含缺陷的GIS壳体的安全性和寿命评估还缺乏专门的方法。本发明包括特高压GIS壳体结构数据获取、特高压GIS壳体缺陷特征获取、特高压GIS壳体缺陷扩展极限确定、特高压GIS壳体材料及焊缝性能获取、特高压GIS壳体疲劳裂纹扩展模型建立、监测提取特高压GIS壳体工况特征参数和特高压GIS壳体疲劳循环次数计算。本发明综合考虑了特高压GIS壳体结构、缺陷、材料性能和交变工况载荷，从中获取缺陷现状和极限尺寸、载荷交变特征和裂纹扩展性能，进而可以较准确的估算特高压GIS壳体疲劳寿命。
摘要（英）：

The invention discloses a service life assessment method for an ultra-high voltage grid GIS housing containing defects. Currently, a dedicated method for assessment on safety and service life of a GIS housing containing defects still lacks. The method comprises structural data acquisition of the ultra-high voltage grid GIS housing, defect feature acquisition of the ultra-high voltage grid GIS housing, defect expanding limit determination of the ultra-high voltage grid GIS housing, material and welded seam performance acquisition of the ultra-high voltage grid GIS housing, fatigue crack extended model establishment of the ultra-high voltage grid GIS housing, monitoring and extraction of working condition feature parameters of the ultra-high voltage grid GIS housing, and fatigue cycle number calculation of the ultra-high voltage grid GIS housing. Structure, defects, material performance and alternating working condition load of the ultra-high voltage grid GIS housing are taken into comprehensive account, and defect present situation and limit size, as well as load alternating features and crack expanding performance are thus obtained so as to precisely estimate fatigue service life of the ultra-high voltage grid GIS housing.

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