General name is smart maintenance-free DC power screen, referred to as DC screen, the universal model is GZDW, and the DC screen is used to supply this DC power supply. Simply put, a DC screen is a device that provides stable DC power. (When the input has 380V power supply directly converted to 220V, in the input (main and backup) are no input, directly converted to battery power - DC 220V: in fact, night can be said to be an industrial emergency power supply). Power operation power supply in power plants and substations is now used in DC power supply, which provides power supply for controlling load and power load, as well as DC accident lighting load, which is the basis of the control and protection of modern power system. The DC screen consists of mating power unit, charging module unit, buck-down silicon chain unit, DC feed unit, power distribution monitoring unit, monitoring module unit and insulation monitoring unit. Mainly used in power systems for small and medium-sized power plants, hydroelectric power stations, all kinds of substations, and other users of DC equipment (such as petrochemicals, mines, railways, etc.), suitable for switching and closing and secondary circuit instruments, instruments, relay protection and fault lighting and other occasions. DC screen is a new type of dc system of digital control, protection, management and measurement. Monitoring host part of the highly integrated, modular function options, DC insulation monitoring, battery detection, switching volume, lightning protection device, insulation relay, according to the drawing requirements for optional, effectively reduce costs! Host all kinds of operating status and parameters are displayed in Chinese characters, the overall design is convenient and simple, human-machine interface friendly, in line with user habits. THE DC SCREEN SYSTEM PROVIDES POWERFUL FUNCTIONS FOR REMOTE DETECTION AND CONTROL, AND HAS REMOTE CONTROL, REMOTE TUNING, TELEMETRY, REMOTE COMMUNICATION FUNCTION AND REMOTE COMMUNICATION INTERFACE. The operating parameters of the DC power supply system can be obtained from afar through the remote communication interface, and the operating status and fixed value can be set and modified through the interface to meet the requirements of the power automation and power system unmanned substation, and the standard RS232/485 serial interface and Ethernet interface can be easily integrated into the power station automation system. DC screen composition: charging cabinet - charging module - monitoring module - battery pack - buck silicon chain
DC screen main features (system features): high reliability: the modular design of the switching power supply, n1 thermal backup. The charging module can be hot-swappable and the average maintenance time is greatly reduced. The power bus and the control bus can be powered directly by the charging module alone and can be thermally backed up by the buck unit.
Hardware low-difference autonomous average flow technology, the maximum output current imbalance between modules is better than 5%.
Reliable lightning and electrical insulation measures, optional insulation monitoring devices can monitor insulation in real time to ensure system and personal safety. System design using IEC (International Electrotechnical Commission), UL and other international standards, reliability and safety are fully guaranteed. High intelligence: the monitoring module uses large-screen LCD Chinese character display, sound and light alarm.
The parameters of each part of the system can be set through the monitoring module. The module has the function of smoothly adjusting the output voltage and current, and the battery charge temperature compensation function.
With multiple extended communication ports, you can access a variety of external smart devices (e.g. battery tester, insulation monitoring device, etc.). Modern power electronics and computer network technology, to provide power system "telemetry, remote control, remote communication, remote transfer" support, to achieve unattended.
Battery automatic management and protection, real-time automatic detection of the end voltage of the battery, charge and discharge current, and the battery floating charge for intelligent energy control, with the battery over voltage and charge over-streaming sound alarm.
The system uses monitoring device built-in insulation monitoring, battery detection, ground selection, battery activation, silicon chain pressure, central signal and other function units, greatly convenient for users;