Research on the optimal configuration scheme of modular UPS system in IDC cabinet. Modular UPS adopts standard structural design. Each system is composed of power module, monitoring module and static switch. It is widely used in large IDC data centers and cabinets to provide stable and reliable uninterrupted power output and ensure the normal operation of the equipment. , no data will be lost. So, as there are more and more types of UPS, the editor of this article will take you to discuss the solutions of modular UPS system in IDC cabinet.

　　In order to adapt to the new DC office building construction and renovation model, control the investment scale, and actively promote the "light asset" operating model, this article jumps out from the traditional UPS system configuration and proposes the "2N-" system concept by optimizing the system configuration of modular UPS. , to meet demand and safety, while reducing investment, improving flexibility, and achieving the purpose of innovative use of new equipment.

　　Hebei IDC cabinet construction background and power consumption analysis of cabinets in use:

　　Currently, 11 city branches in Hebei Province have IDC computer rooms, and plan to focus on developing IDC business from 2017 to 2019.

　　Since the IDC business is an intensive, high-energy-consuming product, the initial investment in construction is large. The investment in supporting equipment such as UPS, battery packs and air conditioners accounts for more than 50% of the equipment in the office. The PUE value during the operation period is even estimated to reach 2.0, and the energy consumption expenditure Remains high for a long time. Therefore, to reduce investment costs and reduce operation and maintenance energy consumption costs, it is necessary to conduct reasonable equipment selection and configuration accounting in the early stages of construction, reduce equipment redundancy, and optimize equipment system utilization and work efficiency.

　　According to statistics, the current average power consumption of a single IDC cabinet in the province ranges from 1kW to 3kW. Since the completion of some computer rooms in 2007, the power consumption of a single cabinet has never exceeded 1kW. According to the statistics of the province's IDC computer rooms, the average power consumption of a single cabinet is only 1.6kW. , which is too different from the 3kW and 4kW single cabinet power consumption requirements proposed by the business demand department, which directly leads to the redundancy of the high and low voltage systems, oil machine systems, and communication power supporting systems in the office rooms exceeding 50% of the design value, resulting in serious waste of construction investment. .

　　Research on the optimal configuration scheme of modular UPS system in IDC cabinet:

　　Calculated based on commonly used UPS products of 300~400kVA:

　　① The load-bearing load requirements of traditional power frequency UPS purchased by the group generally exceed 10kN/m2, and the load-bearing load requirements of some manufacturers' equipment even reach 13kN/m2. The load-bearing load of the original station basically cannot meet the requirements for power equipment.

　　② The load-bearing load requirement of the high-frequency UPS equipment shortlisted for centralized procurement is around 8kN/m2. By rationally laying out the equipment (such as installing the equipment on load-bearing beams) or by installing gravity diffusion racks and other modification methods, the equipment can meet the installation conditions. It can be used as one of the equipment selections.

　　③ The load-bearing requirements of modular UPS launched in recent years are generally around 5kN/m2. They are lightweight equipment and meet the load-bearing requirements. They are also included in the equipment selection this time.

　　Technical prerequisites for using modular UPS system:

　　① The prerequisite for the use of modular UPS is to solve the following two problems:

　　First, whether its reliability has passed technical verification. After years of continuous promotion and improvement by manufacturers, as well as the actual operating experience of each operator, in the latest procurement quantity statistics, procurement from mobile companies accounts for nearly 30%, with an annual growth rate of 360%. The use of mobile companies in Its reliability has been verified to a certain extent. The safety concerns of multi-module AC parallel connection have also been basically solved through the evolution of technology.

　　The second is the operation and maintenance department’s recognition of the safe mode used by the modular UPS system. As the name suggests, the safety backup of the modular system uses module backup. After a single modular UPS system is configured with "N+X" backup modules, its security is basically equivalent to that of a set of N+1 multiple high-voltage UPS systems. frequency UPS system. If the N+1 system model is used and the equipment is replaced by a modular UPS system, its excellent capacity expansion and backup convenience will be offset by the high investment cost.

　　②The use of modular UPS requires optimized configuration

　　Using modular UPS and creating a "2N-" system, the security is close to that of the 2N system. By reasonably reserving the location of the expansion module, reserving the output screen terminals and battery access switch, we can solve the waste of investment in redundant equipment caused by the small number of early users or low load after the equipment is put into production, so that the equipment can work in the optimal load area. Maximize work efficiency and save both project investment and operating expenses.

　　Modular UPS system in IDC cabinet solution:

　　Modular 500kVAUPS system, two modular 500kVAUPS systems constitute a "2N-" system: that is, the modular 500kVAUPS system forms a 2N system structure, but the load utilization rate is not based on the traditional 2N mode in which a single device bears no more than 40%, but a single device. One device can bear 60% to 80% of the load, and its redundancy is the increase in load caused by the failure of 1 to 2 modules of another UPS device. It is planned to add four single-machine modular 500kVAUPS systems to meet the power demand of the equipment in the 4F and 5F computer rooms. Simple calculation: a single system is responsible for powering 95 IDC cabinets. The number of system modules is configured according to the recent load demand (2kW/cabinet). Therefore, a single system is configured with 7 50kVA modules, including 5 main modules. When the subsequent average power consumption of a single cabinet exceeds 2kW, the module capacity will be expanded as needed to meet the equipment power consumption. .

　　Each single-machine module UPS system has an average of 95 racks. When the initial load is 2kW, each system has a load of 190kW. The load rate of each 7-module 350kVA UPS system is 60%. After consulting multiple UPS manufacturers Technical parameters are provided. The UPS system efficiency at 60% load rate is about 96%, and the UPS system is working at its best.

　　The difference between modular UPS power supply and conventional UPS:

　　Compared with the traditional vertical (tower) structure UPS, the rack-mounted modular UPS can be installed in a standard cabinet, saving floor space and space, making it easy to install, use and maintain, and can use shorter power connection cables. By reducing the points of failure between critical equipment and loads, modular UPS increases overall system availability.

　　In addition, modular UPS can bring better scalability to users, which also plays a good role in protecting users' investment.

　　In traditional UPS products, users generally adopt the "1+1" or "N+1" parallel redundancy method to ensure safety, which can only tolerate faults once. In the rack-mounted modular UPS system, users only need to purchase the corresponding power modules to achieve "N+X" fault redundancy. "Modular redundant parallel structure" is more reliable than traditional UPS.

　　In summary, compared with the high-frequency UPS system, the modular UPS "2N-" system is superior in terms of machine room load-bearing, installation space, system wiring, work efficiency, etc., as well as in terms of construction investment and equipment operation accounting. The selection of the best configuration solution for the IDC cabinet reduces the later power supply operating costs. In the future, more customers will adopt modular UPS power supply as a solution in IDC data center and cabinet construction.

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