| 空气敷设下10kV三芯电缆应急时间计算 |
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| 引用本文： | 苏瑞波,王鹏,康守亚,王鹏宇,刘刚,吴国沛,王晓兵.空气敷设下10kV三芯电缆应急时间计算[J].南方电网技术,2015,9(11):78-84. |
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| 作者姓名： | 苏瑞波 王鹏 康守亚 王鹏宇 刘刚 吴国沛 王晓兵 |
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| 作者单位： | 广州供电局有限公司，广州510620,华南理工大学电力学院，广州510640,华南理工大学电力学院，广州510640,华南理工大学电力学院，广州510640,华南理工大学电力学院，广州510640,广州供电局有限公司，广州510620,广州供电局电力设计院，广州510620 |
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| 摘 要： | 当10 kV三芯电缆因故障或检修而需要加载较大的应急负荷时，在电缆导体温度达到最高温限值之前，电缆允许过载的应急时间为多长，是电力部门极其关注和亟待解决的问题。为此以空气敷设的10 kV三芯电缆为研究对象，建立了电缆本体及空气介质的暂态热路模型，并将其等效简化为一阶RC暂态热路模型，计算了10 kV三芯电缆热时间常数，推导出空气敷设三芯电缆在应急负荷下应急时间的计算公式，并设计了空气敷设电缆在不同初始负荷下的应急温升实验，通过对比实测和理论计算数据，验证了该模型和应急时间计算公式的可靠性，可为应急状况下指导电力负荷调度和控制电缆检修工作的时间提供重要参考。
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| 关 键 词： | 三芯电缆 热路模型 热时间常数 应急负荷 应急时间 |
Emergency Time Calculation for 10 kV Three-core Cable Under Air |
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| SU Ruibo,WANG Peng,KANG Shouy,WANG Pengyu,LIU Gang,WU Guopei and WANG Xiaobing.Emergency Time Calculation for 10 kV Three-core Cable Under Air[J].Southern Power System Technology,2015,9(11):78-84. |
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| Authors: | SU Ruibo WANG Peng KANG Shouy WANG Pengyu LIU Gang WU Guopei and WANG Xiaobing |
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| Affiliation: | Guangzhou Power Supply Bureau Co. Ltd., Guangzhou 510620, China,School of Electric Power, South China University of Technology, Guangzhou 510640, China,School of Electric Power, South China University of Technology, Guangzhou 510640, China,School of Electric Power, South China University of Technology, Guangzhou 510640, China,School of Electric Power, South China University of Technology, Guangzhou 510640, China,Guangzhou Power Supply Bureau Co. Ltd., Guangzhou 510620, China and Electric Power Design Institute of Guangzhou Power Supply Bureau Co., Ltd., Guangzhou 510620, China |
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| Abstract: | When 10 kV three-core cable needs to load emergency loads in failure or maintenance, the time the cable can resist the over-load before the temperature of cable conductor reaches the maximum temperature is the major and urgent issue for power department.Therefore, taking the 10 kV three-core cables laid in air as research object, a transient thermal circuit model of cable and air media is established, and the heating time constant of 10 kV three-core cables is calculated by simplifying it into a first-order RC transient thermal circuit model. In addition, the emergency time calculation formula for three-core cable laid in air and the emergency heating experiment for cable laid in air under different initial load are put forward. By comparing the empirical data and theoretical data, the reliability of the proposed model and emergency time calculation formula is successfully proved, which provides an important reference to electricity load distribution under emergency and the control of time in cable maintenance. |
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| Keywords: | three-core cable thermal circuit model heating time constant emergency load emergency time |
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