余俊贤,黄伟校,戴栋,王瑛
YU Junxian,HUANG Weixiao,DAI Dong,WANG Ying

• 1:华南理工大学电力学院
• 2:上海海能先源科技有限公司

摘要(Abstract)：

针对三芯海底电缆（以下简称“海缆”）的非金属护套破损缺陷在线定位问题，提出了一种基于电压连续性与参数优化的在线定位算法。首先，基于Pollaczek理论和F参数法建立了三芯海缆非金属护套破损缺陷理论模型。然后，提出了基于破损缺陷处电压连续性的在线定位算法，并结合粒子群优化算法减小理论模型与实际海缆之间的误差，从而提高算法定位精度。最后，以5 000 m长的220 kV三芯海缆为研究对象，在ATP-EMTP中搭建仿真模型，验证了该方法的灵敏性。结果表明，优化后的理论模型计算出的电压、电流数据与仿真平台数值几乎一致，能够精准定位海缆全长范围内的单相、两相、三相非金属护套破损缺陷，最大相对误差小于4.5%。随着过渡电阻的增加，缺陷变得更微弱，单相非金属护套破损缺陷的最大相对误差有所上升，但不超过6%；两相和三相非金属护套破损缺陷的相对误差略有增加。
To address the challenge of online localization of non-metallic sheath defects in three-core submarine cables(hereafter “ submarine cables”), this paper proposes an online localization algorithm based on voltage continuity and parameter optimization. First, a theoretical model for non-metallic sheath defects in submarine cables is developed using Pollaczek's theory together with the F-parameter method. Building on this, an online localization algorithm is introduced, which leverages voltage continuity at the damage point and employs particle swarm optimization(PSO) to minimize deviations between the theoretical model and actual submarine cable parameters, thereby enhancing localization accuracy. A 5,000-meter, 220 kV three-core cable is then simulated in ATP-EMTP to evaluate the algorithm's performance. The results demonstrate that the optimized theoretical model yields voltage and current data nearly identical to simulation values, enabling precise localization of single-phase, two-phase, and threephase non-metallic sheath defects across the entire cable length, with maximum relative errors below 4.5%. As transition resistance increases, defect severity decreases: the maximum relative error for single-phase defect increases slightly but remains below 6%, while relative errors for two-phase and three-phase defects also rise modestly.

关键词(KeyWords)： 三芯海缆;多导体耦合分布参数模型;在线定位;粒子群优化算法
three-core submarine cable;multi-conductor coupled distributed parameter model;online localization;PSO

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52377145)

作者(Author): 余俊贤,黄伟校,戴栋,王瑛
YU Junxian,HUANG Weixiao,DAI Dong,WANG Ying

DOI: 10.19585/j.zjdl.202601012

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