meaning

The power supply for power operation in power plants and substations is now DC power supply, which provides power for the control load and power load and DC accident lighting load, etc., and is the basis for the control and protection of contemporary power system. The DC panel is composed of an AC distribution unit, a charging module unit, a step-down silicon chain unit, a DC feed unit, a distribution monitoring unit, a monitoring module unit and an insulation monitoring unit. It is mainly used in small power plants, hydropower stations, various substations in the power system, and other users who use DC equipment (such as petrochemical, mining, railway, etc.), and is suitable for switching and closing and secondary circuit instruments, meters, relay protection and fault lighting and other occasions. DC panel is a new type of DC system for digital control, protection, management and measurement. The monitoring host part is highly integrated, using 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 all kinds of operating status and parameters are displayed in Chinese characters, the overall design is convenient and concise, and the man-machine interface is friendly, which is in line with 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. The operating parameters of the DC power supply system can be obtained remotely through the remote communication interface, and the operating status and fixed value can also be set and modified through the interface to meet the requirements of power automation and unattended substation of the power system; It is equipped with standard RS232/485 serial interface and Ethernet interface, which can be easily integrated into the power station automation system.

直流屏的组成The DC screen is composed of: charging cabinet - charging module - monitoring module (also known as power supply monitoring module), battery pack (also known as battery inspector / battery detector series) - step-down silicon chain

The main features of the DC screen are the system features

High Reliability:

Modular design of switching power supply, N+1 hot standby.

The charging module can be hot-swapped with charge, and the average maintenance time is greatly reduced.

The power bus and control bus can be supplied directly by the charging module separately and can be hot-backed by a step-down device.

Hardware low-difference independent current sharing technology, the maximum output current imbalance between modules is better than 5%.

Reliable lightning protection and electrical insulation measures, insulation monitoring devices can monitor the insulation of the system in real time to ensure the safety of the system and personnel.

The system design adopts IEC, 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 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 has the function of battery charging temperature compensation.

With multiple expansion communication ports, it can be connected to a variety of external intelligent devices (such as battery testers, insulation monitor devices, etc.).

The combination of modern power electronics and computer network technology provides support for "telemetry, remote control, remote signaling, and remote adjustment" of the power supply system to achieve unattended.

Automatic battery management and protection, real-time automatic detection of the terminal voltage, charging and discharging current of the battery, and intelligent control of the average float charge of the battery, with battery over-under-voltage and over-current sound and light alarms.

The system adopts built-in insulation monitoring, battery detection, grounding line selection, battery activation, silicon chain voltage regulation, central signal and other functional units of monitoring device, which is greatly convenient for users to use; The system adopts the unique "one-line" wiring technology, which greatly facilitates the on-screen wiring of the large-capacity direct flow system and facilitates user maintenance.

The charging module adopts the free cooling method, which greatly improves the mean time between failures, and can be used in places with relatively harsh environments.

The charging module can be plugged and unplugged with electricity, and the average maintenance time is greatly reduced;

It adopts the latest international soft switching technology, and the main components adopt high-quality brand-name products;

Hardware low-difference independent current sharing technology, the maximum output current imbalance between modules is better than ± 5%;

Reliable lightning protection and high electrical insulation protection measures, insulation monitoring device real-time monitoring system insulation, to ensure system and personal safety;

The monitoring module adopts a large-screen LCD touch screen display, and a real person voice alarm;

The monitoring program adopts object-oriented design ideas and modular programming, which is conducive to program maintenance and upgrading;

The parameters of each part of the system can be set through the monitoring module, and it has a detailed online help function;

It has advanced functions such as smooth adjustment of output voltage and current, automatic temperature compensation of battery, etc.;

The combination of modern power electronics technology and computer technology realizes "telemetry, remote control, remote signaling, remote adjustment" of the power supply system and realizes unattended;

Automatic battery management and protection, real-time automatic monitoring of the terminal voltage, charge and discharge current of the battery, and control the average charge and floating charge of the battery, with battery over-under-voltage and over-current sound and light alarms.

The device can be supported by the program through the public telephone line, and the remote maintenance diagnosis can be realized - DC screen monitoring module.