252 kV SF6/N2混合气体GIS用盆式绝缘子的设计研究
武奇，袁志兵，孙荣春，郭剑火
(正泰电气股份有限公司，上海 201614)
摘 要：开发了三种 252 kV SF6/N2 混合气体全封闭气体绝缘组合电器(GIS)用盆式绝缘子设计方案，分别为单向凸式盆式绝缘子、双侧对称曲面型盆式绝缘子、双侧对称直板型盆式绝缘子，从电场强度、生产装配和安全运行等方面考察了三种设计方案的优缺点，综合分析和比较后最终选择双侧对称曲面型盆式绝缘子，通过对该型盆式绝缘子的绝缘试验和水压破坏试验来验证设计和计算的可靠性，试制结果表明一次性通过绝缘和水压破坏试验。这种设计开发过程和仿真计算相结合，大大减少试验摸索，加快研发进程，提高试制成功率，为其他电压等级盆式绝缘子的设计提供了参考。
关键词： 全封闭气体绝缘组合电器；混合气体；盆式绝缘子；电场强度；机械强度
中图分类号：TM216 ；TM595 文献标识码：A 文章编号：1007-3175(2023)05-0058-05
Design and Research of Basin-Type Insulators for
252 kV SF6/N2 Mixed Gas GIS
WU Qi, YUAN Zhi-bing, SUN Rong-chun, GUO Jian-huo
（Chint Electric Co., Ltd, Shanghai 201614, China）
Abstract: Three design schemes of basin-type insulators for 252 kV SF6/N2 mixed gas GIS have been developed in this paper, and they are unilateral convex basin-type insulators, double-sided symmetrical curved basin-type insulators and double-sided symmetrical straight plate basin-type insulators. The advantages and disadvantages of these three design schemes have been comprehensively investigated from the aspects of electric field intensity, production assembly and safe operation, and the double-sided symmetrical curved basin-type insulators have been finally selected after comprehensive analysis and comparison. The reliability of its design and calculation is verified by insulation tests and hydraulic damage tests, and the tests results show that the double-sided symmetrical curved basin-type insulators can pass these tests at one time. The combination of design and development and simulation calculation can greatly reduce test groping, speed up research and development process and raise the success rate of trial production, providing guidance and reference for the design of basin-type insulators of other voltage levels.
Key words: gas insulated switchgear; mixed gas; basin-type insulator; electric field intensity; mechanical strength
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