DC screen is the abbreviation for DC power operating system, commonly known as intelligent maintenance free DC power screen, abbreviated as DC screen, with the general model GZDW, and DC screen is used to supply this type of DC power.

The power operation power sources in power plants and substations are both DC power sources.

Intelligent maintenance free DC power supply panel 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, suitable for

In situations where switches are opened and closed, as well as instruments, meters, relay protection, and fault lighting in secondary circuits.

The intelligent maintenance free DC power supply screen is a new type of DC system with digital control, protection, management, and measurement. The monitoring host is highly integrated and adopts a single board structure (All in one),

It 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, and various operating statuses and parameters are displayed in Chinese characters,

The overall design is convenient and concise, 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. Obtained remotely through a remote communication interface

The operating parameters of the DC power supply system 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 composition of the intelligent maintenance free DC power supply screen:

a. High frequency switch charging module

b. Monitoring module

c. Distribution monitoring unit

d. Communication and Distribution Unit

e. DC feeding unit

f. Voltage reducing silicon chain unit (optional)

g. Insulation monitoring device, battery monitoring device (optional)

h. Meter, sound and light alarm, flashing device

I. Valve regulated sealed lead-acid battery

J. Cabinet

The main features of the intelligent maintenance free DC power supply screen are:

High reliability:

Adopting modular design with switch mode power supply and N+1 hot backup.

The charging module can be equipped with hot swapping, greatly reducing the average maintenance time.

The power bus and control bus can be directly powered separately by the charging module and can be backed up through a voltage reduction device.

Hardware low tolerance autonomous current sharing technology, with an output current imbalance between modules of less than 5%.

Reliable lightning protection and electrical insulation measures, equipped with insulation monitoring devices that can monitor the insulation status of the system in real time, ensuring the safety of both the system and personnel.

The system design adopts international standards such as IEC (International Electrotechnical Commission) and UL, ensuring sufficient reliability.

High intelligence:

The monitoring module adopts a large screen LCD Chinese character display and sound and light alarms.

Parameter settings for various parts of the system can be made through the monitoring module. The module has the function of smoothly adjusting the output voltage and current, and has the function of compensating for battery charging temperature.
It has multiple extended communication ports and can be connected to various external intelligent devices (such as battery testers, insulation monitoring devices, etc.).
The combination of modern power electronics and computer network technology provides support for "telemetry, remote control, remote signaling, and remote adjustment" of power systems, achieving unmanned operation.
Battery self-supporting management and protection, real-time automatic detection of battery terminal voltage, charging and discharging current, and intelligent control of battery float charging. Equipped with battery overvoltage and overcurrent sound and light alarms.
The system adopts monitoring devices with built-in insulation monitoring, battery detection, grounding line selection, battery activation, silicon chain voltage regulation, central signal and other functional units, greatly facilitating user use;