| 引用本文: | 张雨宁,郝治国,陈彦昕,苏毅能,刘伟,王挺.基于适应性斯皮尔曼相关系数的远海风电直流串并联汇集网络多端量保护方法[J].电力自动化设备,2025,45(12):163-170. |
| ZHANG Yuning,HAO Zhiguo,CHEN Yanxin,SU Yineng,LIU Wei,WANG Ting.Adaptive Spearman correlation coefficient-based multi-terminal protection method for remote offshore wind power DC series-parallel collection network[J].Electric Power Automation Equipment,2025,45(12):163-170. |
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| 摘要: |
| 远海风电规模化催生出全直流送出系统，直流边界元件的缺失弱化了保护依赖的边界特性，使传统保护机制在全直流系统中的适应性欠佳。为此，分析直流串并联汇集网络区内外故障下汇集母线侧多端电流的初始单调性差异，引入动态时间规整算法解决故障参数不同导致初始单调电流序列长度不一致的问题，利用斯皮尔曼相关系数刻画变化趋势相似性，并提出基于适应性斯皮尔曼相关系数的汇集网络多端量保护原理。MATLAB/Simulink仿真测试结果表明，该保护方法可利用1 ms的数据窗长准确可靠辨识区内外故障，可耐受10 Ω的高故障电阻和30 dB的噪声干扰，且对通信同步的要求较低。 |
| 关键词: 远海风电 全直流 串并联汇集 直流汇集 故障分析 线路保护 |
| DOI：10.16081/j.epae.202510026 |
| 分类号:TM614 |
| 基金项目:智能电网重大专项(2030)(2024ZD0801300) |
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| Adaptive Spearman correlation coefficient-based multi-terminal protection method for remote offshore wind power DC series-parallel collection network |
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ZHANG Yuning1,2, HAO Zhiguo1, CHEN Yanxin1, SU Yineng1, LIU Wei1,3, WANG Ting1
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1.School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China;2.Nanjing Power Supply Company of State Grid Jiangsu Electric Power Company, Nanjing 210019, China;3.NARI Technology Co.,Ltd.,Nanjing 211106, China
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| Abstract: |
| The large-scale remote offshore wind power has given rise to full DC power transmission system, the absence of DC boundary component weakens the boundary characteristic relied upon by protection, which results in poor adaptability of traditional protection mechanism in full DC system. Therefore, the difference of initial monotonicity of the multi-terminal currents on the collection bus side under the internal faults and the external faults of DC series-parallel collection network is analyzed, the dynamic time warping algorithm is introduced to solve the problem of inconsistent length for initial monotonic current sequences caused by different fault parameters. Spearman correlation coefficient is used to characterize the similarity of variation trend, and the multi-terminal protection principle for collection network is proposed based on the adaptive Spearman correlation coefficient. The simulation test results of MATLAB/Simulink show that the protection method can accurately and reliably identify the internal and external faults with a data window length of 1 ms, it can withstand a high fault resistance of 10 Ω and noise interference of 30 dB, and has relatively low requirement on communication synchronization. |
| Key words: remote offshore wind power full DC series-parallel collection DC collection fault analysis line protection |
