电网运行环境下基于电热耦合潮流的架空线路应力预估

doi:10.19595/j.cnki.1000-6753.tces.180301

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摘要架空导线的力学状态是决定其安全运行的关键因素,与导线的运行温度及所处的气象环境存在着密切关联。该文在电热耦合潮流计算中考虑架空线路沿线气象分布情况,并结合代表档距法将架空线路沿线各耐张段应力的计算融入到电热耦合潮流计算之中,在此基础上建立电网运行环境下架空线路各耐张段温度和应力的预估方法。该方法能够预估任意电网预想运行方式下架空线路耐张段的温度及应力,为从热、力学本质上分析架空线路的载荷能力及其安全运行提供支持。最后结合某地区电网,用算例验证了该方法的有效性。

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	王孟夏
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	韦志清
	王明强
	张强

关键词 ：电力系统, 电热耦合潮流, 架空输电线路, 沿线气象分布, 应力

Abstract：The tension of conductor, which is related to its operating temperature and weather conditions is an important factor that determines its transfer capability and security operation. In this paper, the meteorological distribution along the overhead transmission lines is considered in electro-thermal coupling power flow calculation, and the inclined parabola state equation is utilized to calculate the temperatures and tensions of tensioning sections during the electro-thermal coupling process power flow calculation. By doing this, the distribution of temperature and tension of tensioning sections along the overhead lines under the anticipated operating scenarios of power systems can be predicted thus revealing the essential transfer capability of overhead lines. Finally, the validity of the proposed method is testified by case studies on a regional power grid.

Key words： Power system electro-thermal coupling power flow overhead transmission line meteorological distribution along transmission lines stress

收稿日期: 2018-03-12 出版日期: 2019-03-21

PACS:

TM76

基金资助:国家自然科学基金（51407111,51407106）和国家重点基础研究发展计划（973计划）（2013CB228205）资助

作者简介: 韩学山,男,1959年生,教授,博士生导师,研究方向为电力市场、电力系统优化调度。E-mail：xshan@sdu.edu.cn

引用本文:

王孟夏,韩学山,韦志清,王明强,张强. 电网运行环境下基于电热耦合潮流的架空线路应力预估[J]. 电工技术学报, 2019, 34(5): 1078-1087. Wang Mengxia, Han Xueshan, Wei Zhiqing, Wang Mingqiang, Zhang Qiang. Tension Prediction of Overhead Transmission Line Based on Electrothermal Coupling Power Flow in Operating Power Systems. Transactions of China Electrotechnical Society, 2019, 34(5): 1078-1087.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.180301 https://dgjsxb.ces-transaction.com/CN/Y2019/V34/I5/1078

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通信作者:王孟夏,男,1983年生,讲师,硕士生导师,研究方向为电力系统分析与优化调控.E-mail:wangmx@sdu.end .cn