500kV同塔双回输电线路感应电压和感应电流仿真分析  

Simulative Analysis of Induced Voltages And Currents For 500kV Double Circuits Transmission Lines on The Same Tower

作　　者：伊晓宇 张佳鑫 郑雄伟 赵海涛 李彦丽 YI Xiaoyu;ZHANG Jiaxin;ZHENG Xiongwei;ZHAO Haitao;LI Yanli(State Grid Hebei Electric Power Research Institute,Shijiazhuang050021,China;Hebei Xibaipo Power Generation Co.,Ltd,Shijiazhuang050400,China;Spi Dongfang New Energy Corporation Changan Branch,Shijiazhuang050032,China)

机构地区：[1]国网河北省电力有限公司电力科学研究院,河北石家庄050021 [2]河北西柏坡发电有限责任公司,河北石家庄050400 [3]国家电投集团东方新能源股份有限公司长安分公司,河北石家庄050032

出　　处：《河北电力技术》2022年第1期35-39,共5页Hebei Electric Power

摘　　要：对于500 kV同塔双回线路,由于双回线路间间距和相间间距较小,当其中一回停运、一回运行时,停运线路上将存在较大的感应电压和感应电流,对线路的运行、检修和接地开关设备的选型等均有较大影响。本文依托华北地区某在运500 kV双回输电线路,利用EMTP-ATP电磁暂态仿真软件搭建同塔双回输电线路仿真模型,分析了同塔双回线路间的水平间距、线路长度、输送潮流、地线高度以及土壤电阻率等影响因素对停运线路感应电压和感应电流的影响规律,并分析了不同接地电阻大小和接地方式对停运线路感应电压和感应电流的影响。仿真结果表明,水平间距、线路长度、输送潮流、地线高度对静电感应分量或电磁感应分量有较大影响,土壤电阻率对感应电压、感应电流的影响可忽略不计;不同接地方式下,停运线路感应电压和感应电流有明显变化。仿真结论对同塔线路设计及检修时安全措施制定具有指导意义。The 500 kV double circuits transmission lines on the same tower have high induced voltage and current due to the small spacing and the short distance, which will directly affect the line maintenance, operation and selection of grounding switch equipment when a circuit is overhauled and the other line is running normally. In this paper, based on one 500 kV double circuits transmission lines in operation in North China, we use EMTP-ATP electromagetic transient simulation software to build the model of double circuit transmission lines on the same tower and then analyze the effects of horizontal spacing between transmission lines, length of the running line, power flow of the line, height of the grounding wire and soil resistivity on the induced voltage and current on the maintence line.And, we also analyze the effects of size of the ground resistance and the grounding mode on the induced voltage and current on the maintence line.The results show that the horizontal spacing between transmission lines, length of the running line, power flow of the line, height of the grounding wire have great influence on the electrostatic and electromagnetic induction components, but the influence of the soil resistivity on the induced voltage and induced current can be ignored.Moreover, under different grounding modes, the induced voltage and current of the overhauled line have obvious changes.The simulation results can provide significance for safety measure formulation when design or maintenance the same tower line.

关 键 词：同塔双回 感应电压 感应电流 接地电阻 接地方式 

分 类 号：TM74[电气工程—电力系统及自动化]