| 引用本文: | 张怿宁,方 苏,国建宝.架空-海缆混合高压输电线路自适应重合闸方案的研究[J].电力系统保护与控制,2020,48(16):115-121.[点击复制] |
| ZHANG Yining,FANG Su,GUO Jianbao.Research on adaptive reclosing scheme for overhead-submarine hybrid high-voltage transmission line[J].Power System Protection and Control,2020,48(16):115-121[点击复制] |
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| 摘要: |
| 提出了利用比率制动差动原理判别架空-海缆混合高压输电线路的故障区段判别方法，以应用于自适应重合闸。在架空线路和海缆连接处增设电流互感器，并通过通信通道将二次电流传输至混合线路两端的保护。当混合线路发生故障，保护动作后，利用线路两端电流互感器和增设的电流互感器二次电流分别构成比率制动差动判据，进行故障区段判别。若故障发生在架空线段，开放重合闸；若故障发生在电缆段，则闭锁重合闸。PSCAD/EMTDC仿真结果表明，该故障区段识别方法能够准确可靠地判别故障区段，无死区、不受故障位置和过渡电阻的影响，可提高自动重合闸的重合成功率。 |
| 关键词: 混合线路 重合闸 差动原理 |
| DOI：DOI: 10.19783/j.cnki.pspc.191260 |
| 投稿时间：2019-10-15修订日期：2019-11-27 |
| 基金项目:南方电网公司重点科技项目资助(CGYKJXM20180146) |
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| Research on adaptive reclosing scheme for overhead-submarine hybrid high-voltage transmission line |
| ZHANG Yining,FANG Su,GUO Jianbao |
| (M&T Center of CSG EHV Company, Guangzhou 510663, China) |
| Abstract: |
| A fault segment discrimination method for determining the overhead-submarine hybrid high-voltage transmission line using the ratio braking differential principle is proposed for application to adaptive reclosing. A current transformer is added at the connection of the overhead line and the submarine cable, and is transmitted to the protection of both ends of the hybrid line through the communication channel. When the hybrid line fails and the protection action is performed, the current transformer at both ends of the line and the secondary current of the added current transformer constitute a ratio braking differential criterion to determine the fault section. If the fault occurs in the overhead line segment, the recloser is opened. If the fault occurs in the cable section, the recloser is closed. The simulation results of PSCAD/EMTDC show that the fault segment identification method can accurately and reliably identify the fault section, without dead zone, with almost no impact on fault location and transition resistance, and can improve the recombination power of the autorecloser.
This work is supported by Key Science and Technology Project of China Southern Power Grid Company (No. CGYKJXM20180146). |
| Key words: hybrid line reclosing differential principle |
