| 平板模型沿面工频沙尘闪络特性的试验研究及放电机制分析 |
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| 引用本文： | 司马文霞,杨庆,吴亮,马高权,武坤,谢博.平板模型沿面工频沙尘闪络特性的试验研究及放电机制分析[J].中国电机工程学报,2010(1). |
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| 作者姓名： | 司马文霞 杨庆 吴亮 马高权 武坤 谢博 |
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| 作者单位： | 输配电装备及系统安全与新技术国家重点实验室(重庆大学); |
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| 基金项目： | 国家自然科学基金项目(90510014)~~ |
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| 摘 要： | 风沙对电力系统外绝缘放电的影响已引起广泛关注,由于污秽绝缘子的闪络与沉积在绝缘子表面的污秽性质有关,沙尘环境下的沙粒性质、状态、大气环境等均对绝缘子闪络特性有影响。因此以典型的平板模型为研究对象,在沙尘模拟实验室,对沙尘环境下外绝缘沿面工频放电特性进行了试验研究和机制分析。得到了风沙速度、风沙带电量、沙粒沉积量及沙粒含水量等因素对沿面放电的影响规律;在有风有沙和有风无沙时,平板模型沿面闪络电压Uf随风速的增大而增大,当风速达到4.5m/s后增大趋势变缓;Uf受沙尘的电荷量影响较小;当干沙粒沉积在绝缘表面时,随着沉积密度的增加,Uf存在着极小值;同时,平板模型的闪络电压还与沉积沙粒的含水量有关。在此基础上分析了风沙环境下绝缘子的沿面闪络过程和放电机制,得出了无沙区域在沿面闪络过程中起重要影响这一结论。
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| 关 键 词： | 沙尘 平板模型 闪络特性 闪络机制 电荷量 |
Experiment Research and Mechanism Analysis on the Sand Dust Flashover of Flat Plate Model Under AC Voltage |
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| SIMA Wen-xia,YANG Qing,WU Liang,MA Gao-quan,WU Kun,XIE Bo ,Shapingba District,Chongqing ,China.Experiment Research and Mechanism Analysis on the Sand Dust Flashover of Flat Plate Model Under AC Voltage[J].Proceedings of the CSEE,2010(1). |
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| Authors: | SIMA Wen-xia YANG Qing WU Liang MA Gao-quan WU Kun XIE Bo Shapingba District Chongqing China |
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| Affiliation: | SIMA Wen-xia,YANG Qing,WU Liang,MA Gao-quan,WU Kun,XIE Bo (State Key Laboratory of Power Transmission Equipment & System Security , New Technology (Chongqing University),Shapingba District,Chongqing 400044,China) |
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| Abstract: | The influence of sand dust on electrical discharge of outdoor insulation has caused wide attention. Because the flashover process of polluted insulator is related to the pollution on the surface of insulator,the flashover process of insulator in sand storm is also influenced by the air condition and the characteristics of sand dust deposited on the insulator surface. Therefore,based on the tests on the typical flat plate model,the research on the flashover process and characteristics of outdoor insulation i... |
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| Keywords: | sand dust storm flat plate model flashover characteristics flashover mechanism charge |
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