随着互联网技术与应用的快速发展，云计算，云存储，大数据等相关新型互联网业务规模与日俱增，数据中心进入规模化建设阶段。数据中心巨大规模的建设与应用，导致数据中心对供电需求快速增长，根据ICT Research 机构预测，2016年的中国数据中心耗电量已逾1000亿千瓦时，相当于三峡水电站年发电总量。于此同时，全球数据中心用电量也已超过10000亿千瓦时。据美国媒体调查，全球各大网站仅数据中心的用电功率，就相当于30个核电站的供电功率，巨大的用电容量给数据中心的建设和运营都带来了全新的挑战。

With the rapid development of Internet technology and application, the scale of cloud computing, cloud storage, big data and other related new Internet business is increasing day by day, and the data center has entered the stage of large-scale construction. The huge scale construction and application of the data center has led to the rapid growth of the power supply demand of the data center. According to the forecast of ICT research organization, the power consumption of China's data center in 2016 has exceeded 100 billion kwh, equivalent to the total annual power generation of the Three Gorges Hydropower Station. At the same time, the global data center power consumption has exceeded 100 billion kwh. According to the US media survey, the power consumption of the data center of the world's major websites is equivalent to that of 30 nuclear power plants. The huge power consumption capacity has brought new challenges to the construction and operation of the data center.

目前在数据中心运营过程中，由于电力故障，设备故障，雷击事件等导致的数据中心用电安全事故时有发生。事实上，数据中心的用电故障带来的损失不仅仅是数百上千万美元的直接经济损失，对于众多国际知名品牌与上市公司来说，品牌和股价等隐形价值的负面影响难以估量。

At present, in the process of data center operation, due to power failure, equipment failure, lightning events, etc., data center power safety accidents occur from time to time. In fact, the power failure of the data center will not only cause direct economic losses of tens of millions of dollars, but also the negative impact of invisible values such as brand and stock price for many international famous brands and listed companies.

随着新型功率半导体器件的发展，新型电力电子电能变化拓扑的发明与应用，以及现代控制理论与数字控制技术的发展，数据中心不间断供电技术得到了显著的提升，对供电系统的可靠性，成本与技能，配置灵活性和可扩展性等提供了有效的技术支撑。

With the development of new power semiconductor devices, the invention and application of new power electronic power change topology, and the development of modern control theory and digital control technology, uninterrupted power supply technology in data center has been significantly improved, which provides effective technical support for the reliability, cost and skills, configuration flexibility and scalability of power supply system.

大型数据中心供电的任何故障都可能给业主和客户带来重大的经济损失或者灾难性的后果。因此，数据中心能否可靠运营的关键之一是IT设备的不间断供电。在保证不间断供电的前提下，不断提升不间断供电架构的可靠性，是数据中心用户一直以来的核心需求。

Any failure of power supply in large data center may bring great economic loss or disastrous consequences to owners and customers. Therefore, one of the keys to the reliable operation of data center is the uninterrupted power supply of IT equipment. On the premise of ensuring uninterrupted power supply, improving the reliability of uninterrupted power supply architecture is always the core demand of data center users.

通常数据中心不间断供电系统一般包括高压配电系统，变压器，柴油发电机组，低压配电系统，防雷器，UPS，电池组，列头柜，机架分配单元（PDU），连接器等组成环节。其中UPS作为不间断供电系统的核心部件，起到举足轻重的作用。为了使不间断供电系统始终保持高效的运作，在特定环境下，选择双转换在线式可能更为合适。特别是在 AC 电源高度失真和/或具有极大电压变化的地理区域，双转换在线式 UPS 无需频繁转换到电池供电即可维持正常输出。较低的电池使用率可以保存电池容量以应对长时间的断电事故，并延长电池使用寿命。此外，降低电池更换成本可以抵消在线互动式 UPS 低初始成本和低运营成本的优势。在某些特殊的情况下可能需要使用双转换在线式 UPS，比如对于某些医疗设备或仪器，需要进行功率因数校正(PFC)、要求较小的物理尺寸或需要进行频率转换等等。前文提到的高效包括：

Generally, uninterrupted power supply system of data center generally includes high-voltage distribution system, transformer, diesel generator set, low-voltage distribution system, lightning arrester, UPS, battery pack, column cabinet, rack distribution unit (PDU), connector and other components. UPS, as the core component of uninterrupted power supply system, plays an important role. In order to keep the uninterrupted power supply system operating efficiently, it may be more appropriate to choose the double conversion on-line mode in a specific environment. Especially in geographic areas where AC power supply is highly distorted and / or has great voltage variation, dual conversion On-line UPS can maintain normal output without frequent switching to battery power supply. Low battery utilization can save battery capacity to cope with long-term power failure and prolong battery life. In addition, reducing the cost of battery replacement can offset the advantages of low initial cost and low operating cost of Online Interactive UPS. In some special cases, double conversion On-line UPS may be used, such as power factor correction (PFC), smaller physical size or frequency conversion, etc. for some medical devices or instruments. The efficiency mentioned above includes:

2 转换效率高(Po/Pin>96%)

2. High conversion efficiency (PO / pin > 96%)

2 输入电流波形的正弦波畸变率小（<5%）

The sine wave distortion rate of 2 input current waveform is small (< 5%)

2 优异的动态负载跟随相应

2 excellent dynamic load follow corresponding

2 N+X的冗余工作模式

Redundancy mode of 2 N + X

为使UPS工作在上述的高效模式，这其中离不开电量传感器对一些关键位置的电压和电流信息的量测。

In order to make ups work in the above-mentioned high-efficiency mode, it is necessary to measure the voltage and current information of some key positions by the power sensor.