Data center room electrical system design and monitoring product selection

introduction

In the 21st century, there has also been a boom in the construction of data centers in China. In particular, in recent years, the number and size of data center computer labs have risen sharply, ranging from a few thousand square meters to tens of thousands of square meters, especially in telecommunications, finance, insurance As well as the government industry is the most, due to the data center room where the special application areas, the design and traditional civil buildings have many differences, data center room is to accommodate the computer room extremely supportive area of ​​a building or part of the building , The main place for data processing and data exchange computer, network equipment, electronic equipment. The data center is the core unit of each unit and the safe and reliable electrical system is crucial to the stable and reliable operation of the equipment room.

According to the data center electrical design standards, data center computer room level can be divided into A level, B level, C level-A level is fault-tolerant (system A + system B); B level is redundant; C level is the basic type, The highest grade A, the most stringent requirements on the use of power, this paper takes a Class A data center room as an example, the electrical system design of the data center in detail.

1 data center room overview

Change the data center room is a 6-storey building, an area of ​​about 84,003. Cut barium Yu Wu W Yu frog Dong Dong Gang knocking neon? 募 line Postscript 嘤 嘤 ρ crab ⑴ rinse fossa? Bu? Crotch?

After the data computer room is completed, it will focus on banking, insurance, communications, software and service outsourcing enterprises, integrating office services and computer lab services into a whole. It is a high standard with good infrastructure, network environment, technical support platform and management service system Comprehensive service outsourcing base, according to GB "Electronic Information System Design Specification" of the relevant provisions of the data center room designated as A-level: tolerance level.

2 for power distribution system

The cabinet in the data center computer room is powered by the special important load in the first class load. The special air-conditioning system in the computer room, the environment and equipment monitoring system, the fire fighting equipment and emergency lighting, the security system electricity, Center room for power distribution system shown in Figure 1.

Data center power distribution system uses 2 +2 redundancy, respectively, two 10kv + UPS battery pack + diesel generator. 3 hot standby each road alternate cold standby (diesel generator), two 10kv power supply at the same time using a single busbar each other standby, when all the way to failure, the other way to ensure the project a load of particular importance and A load of electricity; owned diesel generator load for a particularly important load of the third power supply, data center set up UPS, the rated output power of not less than 1.2 times the sum of the rated power of each device selection, battery capacity by 15min Configuration, diesel motor as a backup power supply.

Transformer installed capacity of 7 units, a total capacity of 8750kvA, of which 6 parts of the data room with a prepared 6, any one of 6 special transformer failure, spare an automatic input, diesel generator room equipped with seven 1250kw diesel generators , Data room part 6 generators and 6 transformers do one-on-one backup, a redundant. From the high-voltage outlet to the transformer, to each floor of the engine room, the data room part of the "super" radial wiring. Data center room for power distribution system is much higher than the GB requirements of the A-level (two hot standby each other) standards.

Figure 1 data center room for power distribution system diagram

3 data center room power distribution solutions

In the data center room for power distribution system diagram, we based on high and low voltage power distribution in particular for the high-voltage power distribution system and low-voltage power distribution system, for different distribution systems, we will take different solutions, we will explain in detail below Different power distribution system corresponding with the corresponding application program.

3.1 high-voltage power distribution system solutions

According to the statistical data that the host computer of the computer system stopped running, nearly half of the computer system host halts due to the power supply stoppage. The power supply includes the mains power supply, variable power distribution device, the line from the substation to the computer room, UPS, The power supply and its power supply and distribution system design play an important role in improving the reliability of data center power supply.

In this system, we introduced the above is 2 +2 redundancy, respectively, two high-voltage + UPS battery + diesel generator, each of the three hot standby +1 road cold standby (diesel generator), Two 10kv power supply using segmented single bus while each other power supply backup, data center system can provide a stable and reliable power supply, in the specific application program we use the power monitoring system Acrel-2000, the system can achieve low pressure Cabinet monitoring and control devices, multi-function power meters, temperature controller, DC screen and other devices that can access the monitoring system through the communication interface or pulse, analog, etc. for data monitoring, in this system, the main use of Is the APMD series of power quality analysis instruments and the AM5 microprocessor-based protection device as the measurement and control device. The APMD series integrates the measurement of all the power parameters and has various peripheral interface functions for user selection. With RS485 communication interface and MODBUS-RTU protocol meet the needs of communications network management, with switching input and relay outputs can be realized breaker switch "remote communication" and "remote" work , Also optional high-capacity SD card for storing a variety of fault information and as many as 200 of the SOT event record. AM5 series of computer protection devices provide uninterrupted protection for the power distribution system. Once a fault occurs, the device can disconnect the fault circuit within 40ms to protect the primary equipment and non-fault circuit from normal operation and prevent the accident from expanding.

Figure 2 high voltage power distribution system solution diagram

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