1 Background and technical preparation

1.1Current status of electricity bill settlement for communication base stations 

In 2014, in accordance with national requirements, the base stations of the three operators were classified as tower companies, and the main body of the base stations became tower companies. All electricity bills were paid by the tower companies, and then the three operators were responsible for the electricity usage of each base station. Settlement with tower companies. At the same time, we have also seen that within two years after the establishment of the Tower Company, the number of shared sites in Nanjing increased to nearly 4,000, such as If a single station regularly measures power consumption and then allocates and summarizes it, the workload will be huge; at the same time, since it is shared by three operators, the changes in the base station are very frequent, and each operator has to pay attention to the power consumption of other operators in the shared base station. There is generally distrust in the situation of adding equipment; the consequence of this is that because each company often disagrees on the sharing ratio and amount of electricity bills, the electricity bills advanced by the tower company have been unable to be recovered in time. Basically, it is normal to advance 2~3 The monthly electricity bill reaches more than 15 million yuan/month. To this end, we have put forward the idea of precise metering, hoping to use technical means to obtain real-time data that will reassure the three operators, achieve accurate allocation of electricity bills, and also help speed up the recovery of electricity bills advanced by the tower company.1.1Consolidate measurement and coll1.2 Working principle of branch metering

In communication base stations, since the operator's equipment mainly uses DC power supply, we use shunt metering equipment to measure the power consumption (DC) of each operator's equipment in real time, and then transmit the data back to the base station through the dynamic environment monitoring system of each base station. Remote monitoring of computer room. The background system aggregates real-time data and calculates the DC power consumption of each operator. Of course, there are also supporting equipment such as batteries, air conditioners, lighting, and monitoring in the computer room that consume electricity. After we wait for the AC meter data to come out every month, we will calculate the difference between the total electricity consumption and the operator's DC electricity consumption. According to the operator's DC power consumption collected in real time, the proportion is divided into

Distributed to every house.

Simply put, the system platform can be divided into 3 modules:

(1) Data collection module;

(2) Data upload module;

(3) Maintain platform database processing module.

The data acquisition module mainly uses Hall sensors, which measure changes in inductance in the cable. Data are generally collected every 15 minutes to measure the current value passing through the cable. The acquisition module and the data upload module pass the RS-485 serial port. communication protocol to connect.

The function of the data upload module is mainly realized through the existing power environment monitoring system of the base station. After the results of the data collection module are uploaded to the remote module of the dynamic environment system, the remote module communicates with the wireless gateway in the network management room through the 4G wireless communication module. Connection, through TCP/IP protocol, to realize real-time upload of the current value collected by the base station to the maintenance platform database, and network

The remote monitoring function of the management room to the remote end.

After the current data is transmitted to the maintenance platform database, the relevant data must be summarized and processed in the background to calculate the monthly DC power consumption of each operator in each base station, and then calculate the proportion of each operator based on the power consumption. Proportional, after the AC power of the electric meter comes out, the power consumption of the supporting equipment will be allocated to each operator accordingly according to the proportion, so that the accurate power consumption of each operator in each base station can be accurately obtained. With the electricity consumption in mind, and referring to the unit price of the electricity bill at the site, the electricity bill that each operator at the site should pay can be calculated. Of course, in conjunction with the above functions, the backend system also provides support functions such as base station basic data maintenance, electricity invoice printing, repayment write-off, and various report statistics.ection capabilities.

Acrel Tower Base Station Energy Consumption Solutions

(1) This solution was designed for IoT online precise sub energy monitoring of the overall telecommunications tower base station.

(2) Normally, the power system of base station could be devided into AC part and DC part [-48Vdc]. And usually request a multi-channel metering regarding the different energy usage like for different telecommunications service provider's base station communications equipment [DC side]. Or for either the mains supply, back-up generator, lighting, airconditioner of base station. [AC side] Thus, multi-channel DC or AC energy meter will be the key to solve such request.

(3) This solution was majorly for both cloud&local energy monitoring, different from Acrel local

energy monitoring solution which is designed for base station local energy monitoring by providing only hardware. In other hands, this solution could be also adapted to 3rd party IoT

energy monitoring system via API or SDK for data transferation

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