Developing a power monitoring and protection system for the junction boxes of an experimental seafloor observatory network*

Wang Jun; Li De-jun; Yang Can-jun; Zhang Zhi-feng; Jin Bo; Chen Yan-hu

doi:10.1631/FITEE.1500099

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Developing a power monitoring and protection system for the junction boxes of an experimental seafloor observatory network*

Computer & Automation | Updated：2022-06-06

- Developing a power monitoring and protection system for the junction boxes of an experimental seafloor observatory network*
- 海底观测试验网络接驳盒电能监控与保障系统的开发
- Frontiers of Information Technology & Electronic Engineering Vol. 16, Issue 12, Pages: 1034-1045(2015)
- Affiliations：
  
  State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
- Author bio：
  
  E-mail:rongjie5257@163.comli_dejun@zju.edu.cn
  ‡Corresponding Author
- Funds：
- DOI：10.1631/FITEE.1500099
  CLC：
- Received：26 March 2015，
  
  Revised：2015-11-06，
  
  Accepted：10 August 2015，
  
  Published：2015-12
- Accepted：
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Wang Jun, Li De-jun, Yang Can-jun, et al. Developing a power monitoring and protection system for the junction boxes of an experimental seafloor observatory network*[J]. Frontiers of Information Technology & Electronic Engineering, 2015, 16(12): 1034-1045.
DOI：

Wang Jun, Li De-jun, Yang Can-jun, et al. Developing a power monitoring and protection system for the junction boxes of an experimental seafloor observatory network*[J]. Frontiers of Information Technology & Electronic Engineering, 2015, 16(12): 1034-1045. DOI： 10.1631/FITEE.1500099.

摘要

目的

接驳盒是水下科学仪器和岸基站之间用来传输电能和通讯的中间处理节点，是海底观测网必不可少的部分。接驳盒电能监控与保障系统主要处理电能分配、浪涌电流抑制、实时监控、接地故障检测、精确时间同步以及针对出现故障的自动响应，其对海底观测网的长期稳定可靠工作具有至关重要的作用。

创新点

选用工业嵌入式控制器获取强抗干扰能力和高可靠性，且所用的控制器具备时间同步模块，可提供微秒级别精度的授时信号。设计并采用功率电阻和接触器并联组成的简单可靠的浪涌电流抑制电路。

方法

两步电能管理方法采用一对并联的金属氧化物场效应管（MOSFET）和一个接触器串联用来产生可靠的电能接驳，抑制浪涌电流，促进自动保护。分别采用设计的接地故障检测电路和传感器来实现接地故障诊断和环境信号监测。采用IEEE 1588（网络测量和控制系统的精密时钟同步协议标准）时间同步方法为接驳盒节点内外提供微秒级别高精度授时信号。

结论

布放前，在实验室环境下对系统的每一部分进行了功能性和可靠性测试，并最终在中国南海进行了海试布放。试验和海试结果表明，所开发的电能监控与保障系统能实现可靠的电能管理、准确的接地阻抗测试、精确的时间同步等功能。

Abstract

A power monitoring and protection system based on an embedded processor was designed for the junction boxes (JBs) of an experimental seafloor observatory network in China. The system exhibits high reliability

fast response

and high real-time performance. A two-step power management method which uses metal-oxide-semiconductor field-effect transistors (MOSFETs) and a mechanical contactor in series was adopted to generate a reliable power switch

to limit surge currents and to facilitate automatic protection. Grounding fault diagnosis and environmental monitoring were conducted by designing a grounding fault detection circuit and by using selected sensors

respectively. The data collected from the JBs must be time-stamped for analysis and for correlation with other events and data. A highly precise system time

which is necessary for synchronizing the times within and across nodes

was generated through the IEEE 1588 (precision clock synchronization protocol for networked measurement and control systems) time synchronization method. In this method

time packets were exchanged between the grandmaster clock at the shore station and the slave clock module of the system. All the sections were verified individually in the laboratory prior to a sea trial. Finally

a subsystem for power monitoring and protection was integrated into the complete node system

installed in a frame

and deployed in the South China Sea. Results of the laboratory and sea trial experiments demonstrated that the developed system was effective

stable

reliable

and suitable for continuous deep-sea operation.

关键词

Keywords

references

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