Shulou(Shulou.com)11/24 Report--

The original title: "do you have any objection to saying that it is the 'perpetual motion machine' of the communication system? "

Communication power supply is the "heart" of communication system, and the stable operation of communication equipment is inseparable from the uninterrupted power supply of communication power supply. If the communication power supply fails (the power supply voltage is insufficient or interrupted, etc.), it will cause the decline of the communication quality, and the serious communication will not be able to communicate. At the same time, it will cause great economic losses and bring great inconvenience to people's life.

1. The application scene of communication power supply in fact, we carry on online shopping, browsing video, playing games and so on, and the communication power supply is quietly escorting. The common application scenarios of communication power supply are: wireless access network base station, renewable energy system, Internet data center, core network center computer room, telecommunications office computer room and so on.

2. The characteristics of the communication power supply in order to provide stable and reliable power supply and ensure the safe and reliable operation of the communication system, the communication power supply should have the following characteristics: reliable, stable, small and efficient.

3. The appearance and composition of communication power supply as we know, the power supply of communication equipment can be AC power supply or DC power supply, but at present it is mainly supplied by-48V DC communication power supply. Today we will take the DC communication power supply equipment as an example to introduce the appearance and composition.

The following picture shows the appearance and internal structure diagram of the common DC communication power supply, which can be seen that the communication power supply is mainly composed of AC power distribution unit, DC power distribution unit, centralized system management unit, rectifier group and battery group.

What is the role of these components in DC communication power supply? We can look at the table below.

module

Function

Ac distribution unit

Receive the input of municipal electricity (that is, what we call power frequency 220V AC), distribute the AC input, protect against lightning and high current.

DC distribution unit

Distribute the output DC current and connect the battery pack.

Centralized system management unit

Manage DC communication power supply, for example, manage battery charge / discharge.

Rectifier group

The alternating current is converted into direct current output for use by communication equipment and battery pack.

Battery pack

In the absence of alternating current input, the battery pack supplies power to the communication equipment.

4. The stable DC output of the communication power supply needs the support and cooperation of the following five components.

As can be seen from the above figure, the input AC is processed by three components: ac distribution unit, rectifier group and DC distribution unit, and finally output as DC.

In order to better understand this process, we can think of the process as a goods transaction, the role of AC distribution unit is "raw material supplier", "raw material" is AC input provided by municipal electricity or oil engine, and rectifier is "processing plant". DC distribution unit is "warehouse / delivery site".

Due to the need for continuous power supply to communication equipment, the total demand for goods is large enough, so:

1. We need to keep buying raw materials.

2. A number of "processing plants"sift" the received raw materials (filtering peak current and clutter) before production.

3. The "warehouse / shipping place" will deliver the goods according to the customer's demand for goods (depending on the size of the distribution current).

What do the remaining battery packs and centralized system management units do?

The battery pack can provide direct current directly and does not need to participate in the current conversion process. As a "backup energy", the battery provides power to the communication equipment when there is no AC input.

The centralized system management unit "communicates" with other components, manages and detects the working status of each component, analyzes and processes these data, and tracks and manages the operation of the whole power supply system.

5. The development trend of communication power supply with the development of communication technology, from the initial DC / DC converter (DC voltage conversion) to the current communication power supply, it has experienced the process of high frequency transformation technology, transformation of power supply mode, improvement of energy storage technology and the emergence of centralized system management.

Today's communication power supply tends to be more integrated, more efficient and more intelligent, and can better adapt to the 5G communication market.

Through today's study, we have learned:

The most common communication power supply is to protect five important systems: wireless access network base station, renewable energy system, Internet data center, core network center computer room and telecommunications bureau computer room.

Communication power supply generally consists of AC power distribution unit, DC power distribution unit, centralized system management unit, rectifier group and battery group.

The current working principle and future development trend of communication power supply.

This article comes from the official account of Wechat: ZTE documents (ID:ztedoc)

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