| 引用本文: | 周全,武霁阳,李海锋.高压直流线路区内外故障判别新方法[J].电力自动化设备,2016,36(12): |
| ZHOU Quan,WU Jiyang,LI Haifeng.In-/out-zone fault identification for HVDC transmission line[J].Electric Power Automation Equipment,2016,36(12): |
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| 摘要: |
| 采用理论推导与仿真分析相结合的方法对高压直流线路区内和区外故障的电压以及电压变化率的暂态特性进行了研究，发现区内外故障的电压变化率最大值出现时刻存在明显差异。利用该特性区分高压直流线路区内外故障。基于PSCAD/EMTDC的仿真测试结果表明，所提方法能可靠识别直流线路区内外故障，且耐受较高的过渡电阻，所需采样频率较低、时间窗短，可基于现有软硬件平台实现。 |
| 关键词: 高压直流输电 行波保护 故障识别 电压变化率 |
| DOI：10.16081/j.issn.1006-6047.2016.12.019 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51577072,51007024)；中央高校基本科研业务费专项资金资助项目(2013ZZ028) |
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| In-/out-zone fault identification for HVDC transmission line |
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ZHOU Quan1, WU Jiyang2, LI Haifeng2
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1.Maintenance & Test Center, CSG EHV Power Transmission Company, Guangzhou 510663, China;2.School of Electric Power, South China University of Technology, Guangzhou 510640, China
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| Abstract: |
| A method combining theoretical derivation and simulative analysis is applied to study the transient characteristics of voltage and its variation rate during the in-zone and out-zone faults of HVDC transmission line. Results show that the maximum voltage variation rate occurrence time of in-zone fault is obviously different from that of out-zone fault, which is then used to distinguish them from each other. The simulative results of PSCAD/EMTDC show that, the proposed method can reliably identify the in-zone and out-zone faults; immune to high transition resistance, it needs low sampling frequency and short time window; and it can be implemented based on the existing hardware and software platforms. |
| Key words: HVDC power transmission traveling wave protection fault identification voltage variation rate |
