500 kV输电线路四分裂导线间隔棒能耗分布研究Study on Energy Consumption Distribution of Quad Bundle Conductor Spacers on 500 kV Transmission Lines
潜力群,吴芳芳,杜昭启,谢声益,叶成,林雪,李世民,张潮海
QIAN Liqun,WU Fangfang,DU Zhaoqi,XIE Shengyi,YE Cheng,LIN Xue,LI Shimin,ZHANG Chaohai
摘要(Abstract)：
间隔棒用于稳定高压架空输电线路多分裂导线的线束间距,以维持电气性能并减小分裂导线的舞动。在交流输电线路中,间隔棒因工频交变的电磁场产生能耗,造成电力能源的流失。为研究间隔棒能耗的分布规律,建立500 kV四分裂导线间隔棒及适配导线的物理模型。通过有限元方法分析工频电流有效值1 000 A、 750 A和500 A通流情况下的四分裂导线间隔棒涡流电流密度、磁场强度分布。仿真结果表明:由于集肤效应和邻近效应,传导电流密度主要分布在适配导线外绞线,可以达到106A/m~2量级;涡流电流密度在10~4～105~A/m~2范围,随着通流工频电流有效值的升高而增大,且随着与外绞线距离增大而急剧减小。最后,针对间隔棒线夹涡流的分布规律,提出两种降低间隔棒能耗的可行性方法。
Spacers are used to stabilize the space between the multiple bundle conductors of high-voltage overhead transmission lines to maintain electrical performance and reduce bundled conductor galloping. In AC transmission lines, spacers give rise to energy consumption due to the alternating electromagnetic field of the power frequency, thus incurring electric energy losses. To study the law of energy consumption distribution of the spacers, a physical model of spacers of 500 kV quad bundle conductors and matching conductors was established. Eddy current density and magnetic field distribution of the quad bundle conductor spacers with effective values of power frequency currents of 1 000 A, 750 A, and 500 A were analyzed by the finite element method. The simulation results show that: the conducting current density distributes largely on the outer stranded line with a magnitude of up to 10~6 A/m~2 because of the skin effect and proximity effect; in case the eddy current density ranges from 104 A/m~2 to 10~5 A/m~2, and it increases with the effective values of conducting currents; two practical methods for reducing the energy consumption of spacers were proposed based on the eddy current distribution law in the clamp.
关键词(KeyWords)：
间隔棒;分裂导线;能耗分布;邻近效应
spacer;bundle conductor;energy consumption distribution;proximity effect
基金项目(Foundation): 国网浙江省电力有限公司科技项目（2020FD06）
作者(Author):
潜力群,吴芳芳,杜昭启,谢声益,叶成,林雪,李世民,张潮海
QIAN Liqun,WU Fangfang,DU Zhaoqi,XIE Shengyi,YE Cheng,LIN Xue,LI Shimin,ZHANG Chaohai
DOI: 10.19585/j.zjdl.202111010
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