Talk about the power distribution design and monitoring product selection of the data center header of the power enterprise

Ren Yunye Ankerui Electric Co.
, Ltd.
Shanghai Jiading 201801 Abstract: Starting from the terminal power supply reliability of the power data center, this paper will conduct a comparative study on the power supply scheme of several major data center cabinets, analyze its advantages and disadvantages, as well as application scenarios, and propose a reference scheme
to provide reliable power supply guarantee for the key loads of the power data center.

Focus on the analysis of several configuration development directions of the column cabinet to conduct in-depth discussions on its reliability, flexibility and economy perspective, and provide reliable power guarantee
for key power loads.

Keywords: data center terminal power distribution column cabinet 1.
Overview: Power data center is a public information platform for power enterprise communications, dispatching, information, marketing, operation, comprehensive management and analysis and decision-making services, is a data exchange and sharing platform for various business application systems, and is an important support platform
for cross-service and cross-process advanced applications of power enterprises.

The power data center not only contains information system application services, but also includes integrated data communication links and integrated environmental control infrastructure, of which the power distribution system is one of
the most critical facilities to support the normal operation of the power data center.

2.
Traditional column head cabinet power supply mode Traditional data center cabinet terminal power distribution adopts the power distribution mode of power distribution column cabinet plus cable, and each cabinet is equipped with two PDU sockets, and takes power
from the column head cabinet through the cable.

There are generally two modes
of power supply between the column head cabinet and the cabinet.

2.
1 Mode 1: Each column cabinet is equipped with two main input switches A and B and corresponding feeder switches, and each cabinet draws power
from one column cabinet.

2.
2 Mode 2: Each cabinet is equipped with two main input switches A or B and corresponding feeder switches, and each cabinet draws power
from 2 column-head cabinets.

3.
Mode 1 and mode 2 contrast mode 1 adopts 1 column head cabinet to provide A and B power supplies to the end device, and mode two is distributed in two column head cabinets to provide A or B power supply
to the end device.

According to the national standard machine room power supply and distribution system structure, under normal operating conditions, mode one and mode two meet the fault tolerance requirements, that is, when any one of the A and B roads fails, it does not affect the operation
of the terminal equipment.

From the perspective of O&M management, when one of the first in mode 1 fails, because the power supply of A and B is in one column cabinet, power outage and maintenance are required, which increases the difficulty and operability
of O&M.

When the configuration in the column head cabinet is low, there is a risk that any one failure may cause failure to the other side
.

Therefore, from the reliability and availability comparison, mode two is relatively high
.

4.
The configuration of the traditional column head cabinet is compared to the column head cabinet as the core equipment of the data center computer room terminal power distribution management, which needs to meet the functions
of power distribution, monitoring, measurement, protection, alarm and so on.

Due to the further concentration of information equipment, the data center has higher and higher requirements for power supply reliability and manageability, and at the same time, with the development of power electronics technology and the integration of computer technology, the highly intelligent technology of the column head cabinet has gradually matured, from the first generation of simple intelligent column cabinet to the highly intelligent third generation of technology
.

4.
1 The development of the column cabinet is roughly divided into three generations, as follows: the first generation: most of them use switches and vertical installation, add digital meters or touch screens and communication interfaces at the inlet end, only monitor the main road, not monitor the shunt
.

The second generation: on the basis of the second generation to increase the tap monitoring, to achieve power monitoring and energy management
.

The third generation: on the basis of the third generation to improve the intelligent technology, centralized switch modularization, secondary component modularization, phase adjustment, monitoring and integration
.

Among them, the first generation is the traditional distribution cabinet, the second generation is the current precision distribution cabinet commonly used in the data center, and the third generation is the modular precision distribution cabinet, which is compared
from the aspects of cabinet integration, monitoring and maintenance.

(As shown in the figure below) As can be seen from the above table, compared with the traditional distribution cabinet, from the perspective of safety management and operation management, the precision distribution cabinet can provide the power management function of the machine room, fully integrate the power distribution system into the machine room monitoring system, monitor the content in addition to the main bus and branch of the electrical system, and provide more management and services
for the computer room.

At the same time, users can detect potential safety hazards as early as possible, take corresponding improvement measures to improve the power supply of the machine room, and effectively avoid risks
.

5.
Solution 5.
1 First generation configuration: telemetry: three-phase voltage, three-phase current, frequency, active power, and active power of the input shunt; Remote signal: input shunt overvoltage/undervoltage, phase loss, overcurrent, frequency too high / too low, input shunt switching state, with current, power demand analysis and statistics, to achieve voltage, current, frequency, power and other parameters of the limit alarm function
.

5.
2 Second generation configuration: telemetry: three-phase voltage, three-phase current, active power, active power of the input shunt; Remote communication: the input shunt overvoltage/undervoltage, phase deficiency, overcurrent, input shunt and output shunt switching state, with current, power demand analysis and statistics, to achieve voltage, current, power and other parameters of the limit alarm function
.

5.
3 The third generation configuration: telemetry: three-phase voltage, three-phase current, active power, and active power of the input shunt; Output shunt single-phase voltage, single-phase current, active power, active power; Remote communication: the input shunt overvoltage/undervoltage, phase deficiency, overcurrent, input shunt and output shunt switching state, with current, power demand analysis and statistics, to achieve voltage, current, power and other parameters of the limit alarm function
.

5.
4 Product model 5.
5 System networking diagram: 5.
ConclusionReliability, maintainability, economy, scalability and energy conservation and environmental protection are several key elements of power data construction and operation and maintenance, and power supply and distribution systems are the key links
in data center infrastructure.

With the rapid development of grid IT information systems, data center terminal power distribution should be supported
by a power distribution structure with higher availability, higher security, and flexibility.

Ankerui Electric Co.
, Ltd.
has long conducted internal and external environmental analysis of the data center industry, analyzed the industry hotspots of national policies and future development trends of the industry, predicted the future development direction of the industry, and improved various application solutions in its own industry, analyzed different customer needs, and met the application needs
of different customers.

References[1] Wang Dewen, Liu Yang.
A Task Scheduling Strategy for Power Cloud Data Center[J].
Power System Automation,2014【2】Acquaray Data Center IDC Distribution Monitoring Solution.
2020.
11 Edition.
【3】Acqua Enterprise Microgrid Design and Application Handbook.
2020.
06 Edition.
[4] Wu Jinsong, Li Guangtai, Li Shutao, Wang Yuting, Zhang Xuechang (China Energy Construction Group Guangdong Electric Power Design and Research Institute Co.
, Ltd.
,) 2018 Author Profile Ren Yunye, currently working at Ankerui Electric Co.
, Ltd.
, mainly engaged in the research and development and application
of data center related products.