DC screen is the abbreviation for DC power operating system. The common name is intelligent maintenance free DC power supply screen, abbreviated as DC screen, and the common model is GZDW. Simply put, DC screen is a device that provides stable DC power supply. When there is a 380V power supply input, it is directly converted to 220V. When there is no input (mains or backup power), it is directly converted to battery power supply - DC 220V: in fact, it can also be said to be an industrial emergency power supply. The power operation power sources used in power plants and substations are currently DC power sources, which provide power for controlling loads, power loads, and DC emergency lighting loads, and are the foundation of contemporary power system control and protection. The DC screen consists of an AC distribution unit, a charging module unit, a step-down silicon chain unit, a DC feeding unit, a distribution monitoring unit, a monitoring module unit, and an insulation monitoring unit. It is mainly used in small and medium-sized power plants, hydropower stations, various substations, and other users who use DC equipment (such as petrochemicals, mines, railways, etc.) in the power system. It is suitable for switch opening and closing, as well as instruments, meters, relay protection, and fault lighting in secondary circuits.

    DC screen is a new type of digital control, protection, management, and measurement DC system. The monitoring host is highly integrated and adopts a single board structure (All in one), which includes functions such as insulation monitoring, battery inspection, grounding line selection, battery activation, silicon chain voltage stabilization, and microcomputer central signal. The host is equipped with a large LCD touch screen, and various operating states and parameters are displayed in Chinese characters. The overall design is convenient and simple, with a user-friendly interface that conforms to user habits. The DC screen system provides powerful functions for remote detection and control, and has remote control, remote adjustment, telemetry, remote signaling functions, and remote communication interfaces. Through a remote communication interface, the operating parameters of the DC power system can be obtained remotely, and the operating status and settings can also be set and modified through this interface to meet the requirements of power automation and unmanned substations in the power system; Equipped with standard RS232/485 serial interface and Ethernet interface, it can be easily integrated into the power station automation system.

    The above content is compiled based on the problems encountered by students in their actual work, for reference only. If there are any problems, please communicate and correct them in a timely manner.