Explain what is distributed power supply and related knowledge

Distributed power supply has the advantage of being a latecomer to traditional UPS solutions. Distributed power supply itself is technologically advanced, and is the master of efficient power supply and distribution system technology and efficient auxiliary system technology. At the same time, the architecture is extremely flexible to meet the requirements of various high-availability scenarios.

1. What is distributed power supply

Distributed power refers to power generation facilities characterized by balanced regulation of distribution network systems or comprehensive cascade utilization of energy multi-generation facilities with power output. The mode of operation is mainly based on spontaneous self-consumption on the home energy storage, and excess power is on the Internet.

Construction and installation on or near the user's site. Including solar energy, natural gas, biomass energy, wind energy, geothermal energy, marine energy, comprehensive utilization of resources, power generation, etc. Distributed power supply is mainly used in various types of switchgear to provide reliable DC power supply for main switches (circuit breakers, load switches, etc.) and secondary protection devices.

2. Analysis of the working principle of distributed power supply

Distributed power supply is a small independent modular power supply compatible with the environment, mainly 6KW, 10KW, and 20KW. According to different customer needs, you can choose a host with matching capacity.

DPS distributed power supply is directly integrated in the upper or lower part of the IDC cabinet, occupying 3U/6U space in a single cabinet without the need to build a separate power distribution room. There are two types of distributed power supply systems: AC power supply and high voltage DC power supply.

3. What are the characteristics of distributed power supply

● Decentralized installation

This not only saves floor space but also reduces costs. According to the embedded design idea, the floor space of the DC screen can be saved. Because the power supply is in switchgear, the use of cables can be reduced, saving primary equipment investment and cable construction workload.

When the total number of units is small, its total price is lower than that of the DC screen system, which can reduce the total cost of the project. At the same time, it can reduce line loss, reduce spare parts and save operating costs during operation.

● Embedded power supply mode

Reliability is greatly improved, and embedded power is adopted. When a circuit fails, the power supply device of other circuits is not affected, avoiding a point of failure and no operating power supply for the entire station. Compared to the centrally powered DC display, its overall reliability is greatly improved.

● Wide range of application

A variety of input and output methods can provide power supply voltage services according to customer needs.

● Intelligent management and maintenance

Intelligent high-frequency power supply technology, self-monitoring, self-diagnosis, and network communication to realize unattended automatic remote management. The built-in battery automatic charging management module automatically performs intelligent floating charge management of the battery, which greatly delays battery life and makes the operation more reliable and safe.

4. What are the main functions of distributed power supply

● Device energy conversion

Distributed power supplies provide energy to charge the battery in the presence of external power, and at the same time provide energy for long-running loads. In energy storage operations, more load energy requirements are provided by batteries. When the AC input loses power, the battery supplies all the energy to the output.

● Automated management

The distributed power supply uses a single chip microcomputer to intelligently charge and discharge the battery, and has the functions of regular automatic uniform charging and automatic floating charging. Self-test the device at any time, and provide buzzer alarm and external alarm signal contact output, and can communicate with the host computer, which can be used for manned and unattended power distribution systems.

The distributed power supply automatically detects the internal temperature of the device, and automatically turns on the fan to dissipate heat when the internal temperature is too high to protect the internal devices. Automatically turn off the fan after temperature drops, reducing power consumption.

● Signal output

The distributed power supply has a normally closed relay output interface. When the unit is powered up, this signal output is synchronized with the internal buzzer alarm signal. If there is no power on the entire device, such as if the device is damaged or the AC input switch is disconnected, it will close and send an alarm signal. The user can add an anechoic circuit to the signal output loop.

5. What are the applications of distributed power

Distributed power application range: small switching stations, ring network cabinets, box substations and user terminals, providing DC power for secondary control lines, primary switchgear, optical communication transceivers, etc.

Distributed power generation can be all self-consumption or self-consumption surplus electricity on the internet, which is chosen by the user, and the insufficient power of the user is provided by the power grid. The top and bottom of the grid are set separately.

6. Distributed power system vs lithium battery UPS system

Distributed power supply is a type of uninterruptible power supply. Its speciality lies in its standard battery and UPS that provides uninterrupted power supply to standard network cabinet network equipment.

Secondly, for distributed power supply, its essence is a lithium battery UPS system based on a fully modular design. UPS and lithium battery are unified as a whole, both support hot plugging, and have internal real-time communication and protection linkage mechanism, high security.

● Advantages of distributed power

Compared with the traditional rack-mounted UPS solution supporting lead-acid batteries, the distributed power supply has fully considered the shortcomings of the traditional scheme, such as difficult equipment replacement and maintenance, complex operation and maintenance monitoring, and has the advantage of being a latecomer at the beginning of design and birth.

First of all, the distributed power supply adopts a fully modular design, lithium battery module and power module support online hot plugging, equipment maintenance and replacement time can be controlled within five minutes, simple and easy to operate.

Secondly, lithium batteries have a life of 10 years or more, and the weight and installation space required are reduced by more than 60% compared to traditional lead-acid solutions. There is no need to replace the battery every 3-5 years, and installation and deployment is simple.

Finally, through distributed power centralized monitoring software, users can simultaneously carry out unified centralized monitoring and management of large-scale deployment of UPS power supply and lithium battery equipment.

7. Solutions of centralized power supply and distributed power supply

Centralized and decentralized power supply is a relative concept, essentially a matter of scale and granularity of power supply. At the application level, centralized and distributed power supply solutions have their own merits. The following issues and challenges are faced when designing and planning:

• The overall deployment of the power supply and distribution system has a large initial investment.
• The rack load rack rate is low, the shelf cycle is long, the U-bit space waste is large, and the operation efficiency is low.
• There are many types of customers and businesses served, the load fluctuates greatly, and the future demand is uncertain.
• The energy-saving renovation of old data centers faces problems such as load-bearing, insufficient space, and high energy consumption.

In the distributed power supply and distribution architecture, the distributed power source can closely follow development and change because its granularity is small enough. It has little impact on the upstream power distribution system and has strong adaptability.

8. Conclusion

 According to the comparison of different power distribution schemes, the construction of traditional uninterruptible power supply systems can be referred to when the load capacity of the computer room is high, the project period is rich, and the customer has no special needs.

Because the actual computer room load is low, the project cycle is tight, the customer requirements are reliable, energy saving, and the cabinet rate is high, it is recommended to refer to the construction of a distributed power system.

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