Using wireless communication to establish DC panel fault diagnosis system, the remote technology center can exchange information with users through the network, understand the working state of DC panel, and use the database interface technology to call the content of the database for DC panel fault diagnosis, and put forward a feasible solution.

      First, previous remarks:

      The power operating power supply in power plants and substations is all DC power supply, which provides power for control load, power load and lighting load of DC accident. It is the basis of control and protection of contemporary power system. The DC panel is composed of mating electric unit, charging module unit, step-down silicon chain unit, DC feed unit, distribution monitoring unit, monitoring module unit and insulation monitoring unit. Mainly used in power system small and medium-sized power plants, hydropower stations, all kinds of substations, and other users using DC equipment (such as petrochemical, mining, railway, etc.), suitable for switching and secondary circuit in the instrument, meters, relay protection and fault lighting and other occasions. DC panel is a new digital control, protection, management, measurement of the new DC system. Monitoring host part is highly integrated, using single board structure (All in One), including insulation monitoring, battery inspection, grounding line selection, battery activation, silicon chain voltage stabilization, microcomputer central signal and other functions. The host is equipped with a large LCD touch screen, and various operating conditions and parameters are displayed in Chinese characters. The overall design is convenient and simple, and the man-machine interface is friendly, which conforms to the user's usage habits. DC panel system provides powerful functions for remote detection and control, and has functions of remote control, remote regulation, remote measurement, remote communication and remote communication interface. Through the remote communication interface, the operation parameters of the DC power supply system can be obtained in the distance, and the operation state and fixed value can be set and modified through the interface to meet the requirements of power automation and power system unattended substation. Equipped with standard RS232/485 serial interface and Ethernet interface, it can be easily incorporated into the power station automation system.

      Therefore, the DC panel industry is related to the safety of power. In major municipal projects, such as subway, transportation hub, airport, high-grade buildings and other fields, it is necessary to take preventive measures. It is inevitable to make use of high-tech Internet of Things technology to make real-time diagnosis and maintenance.

       Second, solutions

       DC panel remote fault diagnosis technology is to combine DC panel fault diagnosis technology with computer network technology, collect its running state data through the Internet of Things, and establish an expert diagnosis center in the equipment maintenance center through the cloud service platform to analyze and diagnose the running state of DC panel. It can make the fault diagnosis more flexible and convenient, and can effectively improve the accuracy of diagnosis and work efficiency, reduce maintenance time.

       Three. System Composition:

      The main functional modules of the system include: Internet of Things gateway, cloud service platform, network diagnosis service program and status monitoring and remote diagnosis software.

      1. Data transmission module: the collected operation data and parameters are sent to the remote diagnosis center. Here, we propose to use the gateway of the Internet of Things based on the GPRS network as the data transmission module. For complex faults, expert diagnosis should be made by combining video information.

      2. Web-based cloud service platform:

     According to the current fault phenomenon, through the Web access mode, combined with the available information provided by the manufacturer, you can query the cause of the fault and processing methods, so as to achieve a simple fault query and diagnosis of the system.

      3. Monitoring and diagnosis in the maintenance center:

      WinMO Internet of Things gateway in this system to provide reliable equipment wireless networking, data remote transmission functions. The communication between the equipment and the remote center is not limited by the distance. The patented anti-drop line mechanism enables the equipment to be online 24 hours a day to ensure smooth communication. Support the unified access of various devices of different brands and different communication protocols. Multi-level user rights security management, network management function to achieve worry-free monitoring, reliable communication links for the remote maintenance of equipment to provide reliable protection.

     Four. Economic benefit analysis:

     With the remote diagnosis and service system, it is possible for users to:

    1, the realization of predictive maintenance, early detection of hidden trouble.

    2, reasonable prediction of service life, so that the equipment in the condition of quality, production and extended service.

    4. Remote device diagnostics and services can also bring multiple benefits to equipment manufacturers

    5, reduce service personnel and costs;

   6. Conveniently track the quality of the equipment, find out the weak links, and constantly improve the quality of the equipment;

   7. State management of equipment to achieve the organic integration of post-maintenance, planned maintenance and predictive maintenance.

   8. Establish long-term and close relationships with users.