| 基于暂态电流故障分量的直流配电网单极故障选线方法 |
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| 引用本文： | 高淑萍,段必聪,宋国兵,邵明星.基于暂态电流故障分量的直流配电网单极故障选线方法[J].太阳能学报,2022,43(3):141-146. |
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| 作者姓名： | 高淑萍 段必聪 宋国兵 邵明星 |
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| 作者单位： | 1.西安科技大学电气与控制工程学院,西安 710054; 2.西安交通大学电气工程学院,西安 710049 |
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| 基金项目： | 国家自然科学基金面上项目（51777166）；;国家留学基金资助项目； |
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| 摘 要： | 基于两电平电压源换流器(voltage sourced converter,VSC)的中压柔性直流配电网适合风能、太阳能等分布式能源的接入,但发生单极接地故障时,其故障电流会迅速增大,保护装置必须快速识别出发生故障的线路.针对该问题,分析VSC端的单极接地故障时的暂态特征,对暂态故障电流的变化特征进行理论分析计算.根据...
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| 关 键 词： | 故障诊断 故障电流 故障检测 柔性直流配电网 故障选线 |
| 收稿时间： | 2020-07-16 |
SINGLE-POLE FAULT LINE SELECTION METHOD OF DC DISTRIBUTION NETWORK BASED ON TRANSIENT CURRENT FAULT COMPONENT |
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| Gao Shuping,Duan Bicong,Song Guobing,Shao Mingxing.SINGLE-POLE FAULT LINE SELECTION METHOD OF DC DISTRIBUTION NETWORK BASED ON TRANSIENT CURRENT FAULT COMPONENT[J].Acta Energiae Solaris Sinica,2022,43(3):141-146. |
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| Authors: | Gao Shuping Duan Bicong Song Guobing Shao Mingxing |
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| Affiliation: | 1. School of Electrical and Control Engineering, Xi’an University of Science and Technology, Xi’an 710054, China; 2. School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China |
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| Abstract: | The medium voltage flexible DC distribution network based on two-level converter （VSC） is suitable for the access of distributed energy such as wind energy and solar energy. However, when the unipolar grounding fault occurs, the fault current will rise rapidly, and the protection device must quickly identify the fault line. To solve this problem, this paper analyzes the transient characteristics of single-pole grounding fault in VSC terminal, and theoretically analyzes and calculates the variation characteristics of transient fault current. The fault line selection is carried out according to the difference of transient fault current information of each line. The proposed method can quickly and reliably identify the fault within 3 ms. Finally, the model of radial medium voltage flexible DC distribution network is built in PSCAD/EMTDC, and the protection line selection algorithm is verified by Matlab. The simulation results show that the proposed line selection method can accurately identify the single-pole grounding fault line of flexible DC distribution network. |
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| Keywords: | fault diagnosis fault currents fault detection flexible DC distribution network fault line selection |
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