强对流天气下输电线路多因素风险动态评估方法
发布时间：2018-08-10 20:16
【摘要】：强对流天气下输电线路面临着雷击、风偏放电以及降雨引起的绝缘子闪络等多因素风险,如何评估这种多因素风险对于强对流天气下电网运维决策、保障线路安全运行具有重要意义。提出一种强对流天气下计及雷、风、雨的输电线路多因素风险动态评估方法。根据临近时段雷电活动的雷电定位系统(lightning location system,LLS)数据,基于雷电流幅值分布计算了线路雷击风险;考虑风、雨荷载,根据杆塔结构推导了风偏放电最低风速,并基于风速分布及风预报计算了线路风偏风险;考虑绝缘子串的盐密分布,基于降雨预报计算了线路的雨闪风险;通过综合雷击、风偏放电、雨闪3种风险,基于强对流过程中未来各个时段的风、雨预报,进而实现强对流天气下对输电线路多因素风险的动态评估。最后通过算例验证了所提方法的有效性及适用性。
[Abstract]:Transmission lines face many factors such as lightning stroke wind bias discharge and insulator flashover caused by rainfall in severe convective weather. How to evaluate this multi-factor risk for power network operation and maintenance decision in severe convection weather? It is of great significance to ensure the safe operation of the line. A multi-factor risk dynamic assessment method for transmission lines with lightning, wind and rain in severe convective weather is presented. Based on the lightning location system (lightning location system LLS) data, the lightning strike risk is calculated based on the lightning current amplitude distribution, and the minimum wind speed of wind-biased discharge is deduced according to the structure of the pole tower considering the wind and rain loads. Based on the wind speed distribution and wind forecast, the line wind deviation risk is calculated; considering the salt density distribution of insulator string, the rain flashover risk is calculated based on rainfall prediction; through comprehensive lightning stroke, wind deviation discharge, rain flash three kinds of risks, Based on the forecast of wind and rain in the future during the strong convection process, the dynamic assessment of the transmission line multi-factor risk can be realized under the strong convection weather. Finally, an example is given to verify the validity and applicability of the proposed method.
【作者单位】： 国网河南省电力公司电力科学研究院;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);
【基金】：国家电网公司重大基础前瞻科技项目(SG20141187) 国家重点研发计划项目(2016YFB0900600)~~
【分类号】：TM75
，
本文编号：2176078
[Abstract]:Transmission lines face many factors such as lightning stroke wind bias discharge and insulator flashover caused by rainfall in severe convective weather. How to evaluate this multi-factor risk for power network operation and maintenance decision in severe convection weather? It is of great significance to ensure the safe operation of the line. A multi-factor risk dynamic assessment method for transmission lines with lightning, wind and rain in severe convective weather is presented. Based on the lightning location system (lightning location system LLS) data, the lightning strike risk is calculated based on the lightning current amplitude distribution, and the minimum wind speed of wind-biased discharge is deduced according to the structure of the pole tower considering the wind and rain loads. Based on the wind speed distribution and wind forecast, the line wind deviation risk is calculated; considering the salt density distribution of insulator string, the rain flashover risk is calculated based on rainfall prediction; through comprehensive lightning stroke, wind deviation discharge, rain flash three kinds of risks, Based on the forecast of wind and rain in the future during the strong convection process, the dynamic assessment of the transmission line multi-factor risk can be realized under the strong convection weather. Finally, an example is given to verify the validity and applicability of the proposed method.
【作者单位】： 国网河南省电力公司电力科学研究院;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);
【基金】：国家电网公司重大基础前瞻科技项目(SG20141187) 国家重点研发计划项目(2016YFB0900600)~~
【分类号】：TM75
，
本文编号：2176078
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