The series DC power supply system is an intelligent high-frequency switching DC power supply designed and produced by our company according to the needs of the power system. It is developed on the basis of summarizing the advanced and mature design, operation experience and development trends in the field of DC power supply for power systems. The new generation DC power supply device is suitable for high-frequency switching DC systems and related supporting equipment in various substations. Its main performance characteristics are stable operation, good anti-interference performance, small ripple coefficient and high technical precision. It is divided into two structural categories: single cabinet and split cabinet. The products are widely used in power plants, hydropower stations and various substations, switching stations, switch stations and user transformers with different voltage levels. They provide circuit breaker opening and closing and It provides DC power supply for instruments, relay protection and emergency lighting in the secondary circuit, which is especially suitable for unattended needs. Our company can provide optimal capacity configuration solutions for selection, and can provide complete technical support.
System Working Principle
Two channels of mains power are input through AC switching and one channel is exchanged to supply power to each charging module. The charging module converts the input three-phase alternating current into direct current, charges the battery, and supplies power to the closing bus load. In addition, the closing bus supplies power to the control bus through the voltage reduction device.
Each monitoring unit in the system is managed and controlled by the main monitoring unit, and the information collected by each monitoring unit is sent to the main monitoring unit for unified management through communication lines. The main monitor displays various information of the DC system. Users can also touch the display screen to query information and operate. System information can also be connected to the remote monitoring system.
In addition to basic units such as AC monitoring, DC monitoring, and switch monitoring, the system can also be configured with functional units such as insulation monitoring and battery inspection to comprehensively monitor the DC system.
Performance characteristics
Adopt high-frequency switching power supply technology, modular design, + hot backup.
Wide voltage input range and strong grid adaptability.
The charging module can be plugged and unplugged when powered, making maintenance convenient and quick.
Have reliable lightning protection and electrical insulation protection measures to ensure system and personal safety.
Using a large-screen touch screen, dot matrix LCD display, and backlight to achieve full Chinese real-time display and operation.
System parameters can be queried and set by clicking on the touch screen. The human-machine interface is friendly and the operation is simple and convenient.
The monitoring system can automatically complete the precise management of battery voltage, charge and discharge current and temperature compensation to ensure that the battery is working in the best condition and extend the battery life.
Adopt a distributed monitoring system with microprocessor as the core and modular design to implement all-round monitoring and control of the power system and four remote control of the power system to achieve unattended operation.
Real-time monitoring of battery terminal voltage, charge and discharge current, precise control of equal charge and float charge of the battery, and functions such as battery over-under voltage alarm, battery over-temperature alarm and over-charge protection.
The system has the management function of battery temperature compensation.
A monitoring system can be used to manage dual battery packs, three charging devices, and busbar segments to achieve independent charging management of dual battery packs.
Technical indicators
AC input voltage (three-phase)
Grid frequency
Power factor
Input overvoltage alarm
Input Under-voltage alarm
Output voltage range is continuously adjustable,
Current stabilization accuracy
Voltage stabilization accuracy
Efficiency
Ripple coefficient
Output under-voltage protection,< br/> Output overvoltage protection,
Relative humidity (℃)
Insulation resistance
Audible noise
Ambient temperature ℃～+℃
Mechanical properties
Insulation strength, output to ground, input to ground, input to output application time, no arcing or flashover
Dimensions
Usage environment
/>Using environment requirements
Altitude meters below sea level
Ambient temperature ℃～+℃
Relative humidity (℃)
The continuous fluctuation range of AC grid voltage amplitude does not exceed the rated voltage
The frequency fluctuation range of the AC power grid does not exceed
There is no severe vibration and impact in the operating location, no strong electromagnetic field interference, and the vertical tilt does not exceed excessive
The machine room is free of corrosive metals and harmful gases that damage insulation, and there is no conductive dust and Hazardous media causing fire and explosion.
DC power supply system (DC panel)