The meaning and function of DC screen_Chuanyang Electric Co., Ltd.
The meaning and function of DC screen
Date of publication: 2017-6-3
DC screen is the abbreviation of DC power supply operating system.The common name is smart maintenance-free DC power supply screen, or DC screen for short. The common model is GZDW, and the DC screen is used to supply this DC power supply..The power operation power supply in power plants and substations nowadays is DC power supply, which provides power for control load, power load and DC accident lighting load, etc. It is the basis of contemporary power system control and protection..The DC screen is composed of AC power distribution unit, charging module unit, step-down silicon chain unit, DC feed unit, power distribution monitoring unit, monitoring module unit and insulation monitoring unit.Mainly used in power systems, small and medium power plants, hydropower stations, various substations, and other users who use DC equipment (such as petrochemicals, mines, railways, etc.) Electric protection and fault lighting and other occasions. The DC screen is a new type of digital control, protection, management, and measurement of a new type of DC system.The monitoring host part is highly integrated and adopts a single board structure (All in one), which contains 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, various operating status and parameters are displayed in Chinese characters, the overall design is convenient and simple, the man-machine interface is friendly, and it conforms to the user’s habits.The DC screen system provides powerful functions for remote detection and control, and has remote control, remote adjustment, remote measurement, remote signaling functions and remote communication interfaces.The operating parameters of the DC power supply system can be obtained remotely through the remote communication interface, and the operating status and fixed values can also be set and modified through the interface to meet the requirements of power automation and power system unattended substations; equipped with standard RS232/485 strings Line interface and Ethernet interface, which can be easily incorporated into the power station automation system. The composition of the DC screen: Charging cabinet-charging module-monitoring module-battery pack DC screen Main features: System features High reliability: Modular design of switching power supply, N+1 hot backup. The charging module can be hot-swapped and unplugged, and the average maintenance time is greatly reduced. The power bus and the control bus can be directly powered by the charging module alone, and can be backed up by the voltage reduction device. Hardware low-difference independent current sharing technology, the maximum unbalance of output current between modules is better than 5%. Reliable lightning protection and electrical insulation measures, and the optional insulation monitoring device can monitor the insulation of the system in real time to ensure system and personal safety. The system design adopts IEC (International Electrotechnical Commission), UL and other international standards, and the reliability and safety are fully guaranteed. High intelligence: The monitoring module adopts large-screen LCD Chinese character display, sound and light alarm. The parameter setting of each part of the system can be carried out through the monitoring module.The module has the function of smoothly adjusting the output voltage and current, and has the function of battery charging temperature compensation. With multiple expansion communication ports, it can be connected to a variety of external smart devices (such as battery testers, insulation monitoring devices, etc.). The combination of modern power electronics and computer network technology provides support for “remote measurement, remote control, remote signaling, and remote adjustment” of the power supply system to realize unattended operation. Battery self-supporting management and protection, real-time automatic detection of battery terminal voltage, charging and discharging current, and intelligent energy control of battery floating and charging, with battery over-voltage and under-voltage and charging over-current sound and light alarms. The system adopts monitoring device built-in insulation monitoring, battery detection, grounding line selection, battery activation, silicon chain voltage regulation, central signal and other functional units, which are greatly convenient for users to use; the system adopts unique “one-line” wiring technology, which is greatly convenient for large-capacity In-screen wiring of the DC system, convenient for user maintenance. ● The charging module adopts natural cooling, which greatly improves the mean time between failures and can be used in places with relatively harsh environment; ● The charging module can be plugged and unplugged under power, and the average maintenance time is greatly reduced; ● The latest international soft switching technology is adopted, and the main components are high High-quality brand-name products; ● Hardware low-difference autonomous current sharing technology, the maximum unbalance of output current between modules is better than ± 5% ● Reliable lightning protection and high electrical insulation protection measures, insulation monitoring device real-time monitoring of system insulation to ensure System and personal safety; ●The monitoring module adopts large-screen LCD touch screen display, real-person voice alarm; ●The monitoring program adopts object-oriented design ideas, modular programming, which is conducive to program maintenance and upgrade; ●The monitoring module can be used to perform various parts of the system Parameter setting, with detailed online help function; ● With advanced functions such as smooth adjustment of output voltage and current, automatic temperature compensation of battery; ● Combination of modern power electronic technology and computer technology to realize the “remote measurement, remote control, and remote signaling of the power supply system” “Remote adjustment” and realization of unattended operation; ● Automatic battery management and protection, real-time automatic monitoring of battery terminal voltage, charging and discharging current, and control of battery equalization and floating charging, with battery over-voltage and under-voltage and charging over-current Sound and light warning. ●The device can carry out program support through the public telephone line to realize remote maintenance and diagnosis. DC screen monitoring module
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