基于弱磁探测技术的高压海底电缆精确定位系统设计

Design of high voltage submarine cable precise positioning system based on weak magnetic detection technology

摘要:

高压海底电缆具有耐腐蚀、抗冲击性能好和电气寿命长等优点，是海上输电系统的重要组成部分，为保证海底输电系统正常运行，设计并开发了基于弱磁探测技术的高压海底电缆精确定位系统。装设海底弱磁探测器作为弱磁探测技术的执行元件，改装高压海底电缆精确定位器。根据高压海底电缆的组成结构、电力学工作原理以及磁场分布特征，构建高压海底电缆及其磁场等效模型。采集高压海底电缆的实时状态数据，利用弱磁探测技术获取高压海底电缆周围的磁信号，通过信号特征匹配与坐标计算，得出高压海底电缆精确定位结果。通过系统测试实验得出结论：与传统定位系统相比，优化设计系统定位静态电缆的平均误差降低约10.82m，定位动态电缆的平均误差降低了11.37m，表明了所设计系统在定位精度方面具有明显优势。

Abstract:

High voltage submarine cables have the advantages of corrosion resistance, good impact resistance and long electrical life, and are an important part of the offshore power transmission system. To ensure the normal operation of the submarine power transmission system, a high voltage submarine cable pinpointing system based on weak magnetic detection technology has been designed and developed. A submarine weak magnetic detector is installed as the actuating element of the weak magnetic detection technology, and the high-voltage submarine cable is retrofitted with a precise locator. An equivalent model of the high-voltage submarine cable and its magnetic field is constructed based on the composition and structure of the cable, the working principle of electrical engineering and the magnetic field distribution characteristics. The real-time state data of the high-voltage submarine cable is collected and the magnetic signal around the high-voltage submarine cable is obtained by using the weak magnetic detection technology, and the high-voltage submarine cable is precisely located by matching the signal characteristics and calculating the coordinates. Compared with the conventional positioning system, the average error of the optimised system in locating the static cable is reduced by about 10.82m and the average error in locating the dynamic cable is reduced by 11.37m, indicating that the designed system has obvious advantages in terms of positioning accuracy.