Power frequency UPS battery, high frequency UPS battery and modular UPS battery, which one is more suitable for data center needs?

by:CTECHi     2021-08-29
Which one of the industrial frequency UPS, high frequency UPS and modular UPS is more suitable for data center needs? Data center has always been the focus of investment in finance, government, energy, transportation and other industries, and its impact on system flexibility, availability, operational efficiency, and operation and maintenance To ensure that the power supply and distribution UPS system builds a green data center, is it a power frequency UPS, a high frequency UPS, or a modular UPS? Which of the industrial frequency UPS, high frequency UPS and modular UPS is more suitable for data center requirements? From the perspective of data center requirements, the configuration of UPS should have the characteristics of flexible expansion, high availability, high power, high density, and intelligence. The editor of this article compares the power frequency UPS, high frequency UPS and modular UPS commonly used in data centers. Power frequency UPS: Power frequency UPS cannot be expanded as needed at any time. The availability is low. Once the fault operation and maintenance personnel cannot handle it, the original factory maintenance is required. The fault recovery time is long and the efficiency is low. The low load rate and harmonic control measures cause the operating efficiency to be much lower. Declared efficiency, the operating efficiency is generally about 85%, the power density is low, the built-in transformer is used for step-up and the neutral line, the power density is difficult to increase, depending on the design, but important manufacturers of industrial frequency UPS in recent years have stopped research and development, and the degree of intelligence relatively low. In addition, the industrial frequency machine has a large area, low efficiency, heavy weight, and difficult installation. In addition, the industrial frequency machine is of a tower structure with complicated internal structure, and maintenance must be performed by professional engineers, which is time-consuming and labor-intensive. High-frequency UPS: High-frequency UPS cannot be expanded on demand at any time. The availability is low, but the cost is low and the practicability is good. Once the fault operation and maintenance personnel cannot handle it, the original factory maintenance is required, and the fault recovery time is long. The efficiency is higher, the operating efficiency is generally 90%~94%, and the power density is higher. After the transformer is canceled, the efficiency will be improved to a certain extent, and the matching degree is average. High-frequency UPS must use high-frequency IGBTs that can work in 20kHz UPS. This IGBT is expensive, has a small supply, has a strict voltage and current working area, has poor impact resistance, low reliability, and high failure rate. Modular UPS: Modular UPS has flexible expansion and high availability, and can be added or decreased at any time to support hot swap. N+X redundancy achieves higher reliability; the operation and maintenance personnel can replace the faulty module to eliminate the fault. The efficiency is higher, the efficiency is generally higher, and it is easy to achieve greater power density. It is generally high-end products of various manufacturers, and the degree of intelligence is relatively high. high. It can be seen from the table that industrial frequency UPS and high frequency UPS have been difficult to match the needs of data centers in terms of scalability, availability, efficiency, or power density. The modular UPS has excellent performance in these aspects and will surely become the mainstream choice for uninterruptible power supply systems in data centers. At present, power consumption has become the most important cost component of data centers. The lithium battery modular UPS product improves the efficiency of the whole machine, has no reactive current input, and does not interfere with the power grid. It is in the true sense of 'high efficiency, no pollution, and low energy consumption. 'The green power supply. Modular UPS products have been widely used in various industries such as military, aerospace, telecommunications, medical care, finance, securities, scientific research, manufacturing, commerce, and communication, and have been widely recognized by users. The lithium battery modular UPS system capacity has 100KVA, 150KVA, 200KVA, 240KVA, 320KVA, 480KVA multiple systems, the power module is 10KVA, 15KVA, 20KVA, three power ranges, users can choose at will according to the size of the load; the system is a modular structure, It is composed of a static switch module, a monitoring module and N power modules in parallel. The module N+X is redundant and can be upgraded and expanded online according to user needs. Absolute advantages of modular UPS 1. Strong availability and simple maintenance: Modular UPS, all modules adopt online hot-swappable design, which can easily realize online replacement of modules. 2. Expand capacity on demand to save initial investment: According to the current foreseeable business needs, configure the current UPS actual capacity, and later according to the new business situation, you can easily realize the online new power module UPS system without shutting down/transferring to bypass/ Module tag setting and other operations. 3. Simple installation and convenient expansion: Modular UPS has a variety of main frame cabinets for users to choose from, the main frame installation is simple and convenient, and the racks can be directly connected in parallel to expand the capacity. Rack-mounted modular cabinets can also be easily embedded in standard server cabinets for installation. 4. Green and environmental protection, reduce harmonic pollution: the efficiency of the whole machine is greater than 95%, the inverter current harmonic (THDI) is less than 3%, and the input power factor (PF) is greater than 0.99. 5. Small size and light weight, easy to transport and install: module The standard UPS model has eliminated the configuration of the output isolation transformer, resulting in a further reduction in volume and a substantial reduction in weight. Whether it is transportation cost or installation, it is more economical and convenient than industrial frequency UPS. Summary: It can be seen that modular machines will become the mainstream of the market. Modular UPS has been increasingly used in data center construction and expansion projects by virtue of redundant hot-swappable and high-efficiency features. In the development trend of big data and mobile Internet, the pace of large-scale application of modular UPS will be further accelerated.
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