Application of Multi-loop Instrument in "Transfer to Straight" of Base Station      

 

1 Introduction

        With the rapid development of 5G base stations, the problem of energy consumption of base stations has become more and more prominent. An efficient and reliable base station power distribution system solution is an important guarantee for improving the energy consumption efficiency of base stations and realizing energy saving and consumption reduction of base stations. The electrical load situation of each distribution circuit is the premise of this scheme. In addition, in terms of base stations, whether it is a macro base station with greatly increased equipment power or a large number of small and micro base stations, a low-voltage power distribution system is required for power supply. 

2 Industry Policy

        Recently, in order to reduce the operating cost of digital infrastructure, various localities have issued relevant policies for "replacement to direct power supply", that is, to establish a green channel for the review and installation of telegrams for communication base stations, and to support qualified 5G base stations to convert power supply to direct power supply and participate in direct power transactions. . Because the power supply method when the early base station was established was to transfer power supply, that is, power supply to the base station through the community power supply equipment (customer property equipment), and the base station electricity fee was charged by the property. increase in cost. Therefore, the transformation of "turning and straightening" is urgent. 

3 Product introduction

        For the transformation of the base station, we can roughly divide it into two aspects based on its power supply mode: AC and DC. Its retrofit solution will also be introduced in two parts.

        The following is a topology diagram of common base station energy consumption and power distribution:

solutions for base station

        For monitoring point A, it can be divided into AC single-circuit monitoring and AC multi-circuit monitoring, corresponding to the following scenarios 1 and 2 respectively.

        For monitoring point B, it can be divided into DC multi-circuit monitoring, corresponding to the following scenario 3.

        1. Application Scenario 1: One-way AC three-phase or three-way single-phase metering

solutions for base station
multi-channel meters for base station

Configuration:

Configuration

quantity

function

Remark

meter

ADW350WA

1

Detect voltage, current, active power, reactive power, power factor, active power, reactive power, multi-rate power, power freeze, 2-31st harmonic, polar Value/RS485 communication, etc.; with 3-way switch output, 2-way temperature measurement, and wireless communication methods such as 2G/ NB /4G. 3-way switch output (optional K)2-way temperature measurement (optional T) RS485 (optional c) GPRS wireless communication (optional 26) B - IOT wireless communication (optional m)

4G wireless transmission (optional 4G)

 NB, 4G choose one of three

 

 

 

 

 

 

Transformer

 

 

AKH-0.66/ W - 9N

3

Single transformer, measuring single-phase loop currentRated current 50A, aperture: 9 When the current specification is 50A
 

 

- 0.66/ W - 12N

3

Single transformer, measuring single-phase loop current, rated current 100A, aperture : 20 When the current specification is 100A

2. Application scenario 2: multi-circuit AC three-phase and single-phase metering

Acrel base station
multi-channel energy meter

Configuration:

Configuration quantity function Remark
 

 

 

 

 

 

meter

 

 

 

 

 

 

DTSD1352-4S

 

 

 

 

 

 

1

Detect voltage, current, active power, reactive power, power factor, active energy, reactive energy, multi-rate energy, 2-31st harmonics, RS485 communication of 4-way three-phase circuits or 12-way single-phase circuits, and can Extend wireless communication such as 2G/NB/4G  
 

 

 

Transformer

 

 

 

AKH -0.66/W-1

2NY100A/50mA

 

 

 

4

Three transformers as a whole, measuring three

Phase loop current, RJ12 crystal interface,

Rated current 100A

When the current specification is 100A

        Application example - the field use example of a base station is as follows:

multi-circuit energy meters for base station

Data Room

panel meters

Configuration:

Configuration quantity function Remark

meter

 

 

 

 

 

AMC300L-4E3

1

Detect 4 three-phase circuits or 12The voltage, current,Active power, reactive power, power

Rate factor, active energy, reactive power

Power, 2 active DI, 4 no

Source DI, 2-way switch output,

RS485 communication

4G wireless communication (optional4G)NB - IoT Wireless Communication

(Optional NB)

 

Transformer

 

AKH -0.66/W-1

2NY100A/50mA

 

4

Three transformers as a whole, measuring threePhase loop current, RJ12 crystal interface,Rated current 100A When the current specification is 100A

3. Application scenario 3: DC multi-circuit monitoring

-48V electrical diagram

multi-loop energy meters
din rail multi-circuit meters

Configuration:

Configuration quantity function Remark
 

 

 

 

 

meter

 

 

 

 

 

AMC16-DETT

 

 

 

 

 

1

Detects the shunt voltage, current, power, electric energy, multi-rate electric energy, total power and total electric energy of 6 DC circuits, RS485 communication, LED status indicator, and has functions such as mains detection, ±12V Hall sensor power supply output, etc. The current loop needs to be connected to a 0-5V Hall sensor +-48V DC power supply (-48~-60VDC)

The communication protocol meets the relevant requirements of YD /T1363

 

 

 

Hall sensor

 

 

AHKC-EKA 50A/ 5V

 

 

x

Rated current 50A/5V, aperture: 20 Usually used for sub-circuit metering, the number does not exceed 6
 

 

AHKC - EKB 100A/5V

 

 

x

Rated current 100A/5V, aperture: 40 Usually used for sub-circuit metering, the number does not exceed 6
 

AHKC-K 200A/5V

 

x

Rated current 200A/5V, aperture: 64 * 16mm Usually used for total loop metering, the number does not exceed 6

Application example - the field use example of a base station is as follows:

power distribution cabinet

4. Conclusion

        By adding AC/DC intelligent monitoring equipment to sub-sites such as 5G macro base stations and small base stations, we can strive to support qualified base stations from switching power supply to direct power supply, which not only eliminates potential safety hazards for base stations, but also improves power reliability. , effectively reducing the operating electricity costs of China Mobile, China Unicom and the Tower Company.


Post time: Aug-17-2022