| 10 kV交流XLPE电缆改为直流运行的热电耦合仿真 |
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| 引用本文： | 王启隆,王国海,陈向荣,于竞哲.10 kV交流XLPE电缆改为直流运行的热电耦合仿真[J].西南交通大学学报,2022,57(1):46-54. |
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| 作者姓名： | 王启隆 王国海 陈向荣 于竞哲 |
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| 作者单位： | 1.浙江大学电气工程学院, 浙江 杭州 3100272.浙江万马高分子材料集团有限公司, 浙江 杭州 3113053.国网冀北电力有限公司电力科学研究院, 北京 100045 |
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| 基金项目： | 国家自然科学基金（51977187）；;浙江省自然科学基金(LY18E070003)； |
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| 摘 要： | 为了研究电缆在不同敷设方式和直流拓扑结构时的直流运行参数，以10 kV交流配电网中广泛使用的三芯交联聚乙烯（cross-linked polyethylene，XLPE）电缆为例，通过有限元仿真软件建立电缆温度场、流场和电场耦合仿真模型，对直埋敷设、排管敷设和沟槽敷设下电缆分别以双极式、单极式、三线双极式（three-wire bipole structure-high voltage direct current，TWBS-HVDC） 3种直流拓扑结构运行时的温度分布、流场分布和暂稳态电场分布进行了仿真分析. 结果表明:在相同敷设方式下，电缆以三线双极式运行时的直流载流量最大，而以单极式运行时的直流载流量最小；10 kV交流电缆在3种敷设方式和3种直流拓扑结构下的直流电压等级均可取10 kV，且留有一定的电压裕度；电缆在沟槽敷设和单极式运行条件下的最大直流输送功率最大，为13.2 MW，而在排管敷设和双极式运行条件下的最大直流输送功率最小，为8.7 MW；当交流电缆改为直流运行后，最大输送功率将会有较大的提升.
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| 关 键 词： | XLPE电缆 直流拓扑结构 电缆敷设 直流功率输送 数值仿真 |
| 收稿时间： | 2021-02-05 |
Thermo-Electric Coupling Simulation for 10 kV AC XLPE Cable in DC Operation |
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| WANG Qilong,WANG Guohai,CHEN Xiangrong,YU Jingzhe.Thermo-Electric Coupling Simulation for 10 kV AC XLPE Cable in DC Operation[J].Journal of Southwest Jiaotong University,2022,57(1):46-54. |
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| Authors: | WANG Qilong WANG Guohai CHEN Xiangrong YU Jingzhe |
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| Affiliation: | 1.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China2.Zhejiang Wanma Macromolecule Material Co. Ltd., Hangzhou 311305, China3.Electric Power Research Institute, State Grid Jibei Electric Power Co. Ltd., Beijing 100045, China |
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| Abstract: | To study the DC operation parameters of the 10 kV AC cable in different laying modes and DC operation topologies, according to the example of the three-core cross-linked polyethylene (XLPE) cable widely used in 10 kV AC distribution network, the temperature field, flow field and electric field coupling simulation models are established through finite element simulation software. The temperature field, the flow field, the steady electric field and the transient electric field are analyzed respectively, in the cases of the cable laid in the soil, pipeline and trench (three laying modes) and operating in the bipole, monopole and triple (three-wire bipole structure-high voltage direct current, TWBS-HVDC) DC operation modes (three DC operation topologies). The results show that for the same laying mode, the TWBS-HVDC has the highest DC ampacity, while the monopole mode has the lowest DC ampacity. The DC voltage levels of the 10 kV AC cable in the three laying modes and three DC operation topologies are 10 kV and leave a certain voltage margin. The cable in the trench and monopole mode has the highest maximum DC transmission power, i.e., 13.2 MW, whereas the cable in the pipeline and bipole mode has the lowest maximum DC transmission power i.e., 8.7 MW. The maximum transmission power of the AC cable will have a significant increase after the cable is converted into DC operation. |
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