From the perspective of data center requirements, the best UPS should have the characteristics of elastic expansion, high availability, efficiency, high density, and intelligence. According to this standard, a comparison is made between the power frequency UPS, high frequency UPS and modular UPS commonly used in data centers.
Adaptability table of different types of UPS to data center requirements:
| Power frequency UPS |
High Frequency UPS |
Modular UPS | |
| Power frequency UPS | Difficult to expand on demand | Difficult to expand on demand | Expand on demand |
| Elastic expansion | The availability is low. Once the failure operation and maintenance personnel cannot handle it, the original factory maintenance is required, and the failure recovery time is long. | The availability is low. Once the failure operation and maintenance personnel cannot handle it, the original factory maintenance is required, and the failure recovery time is long. | High availability, N+X redundancy achieves higher reliability; operation and maintenance personnel can replace faulty module to eliminate faults. |
| Availability | Low, low load rate and harmonic control measures cause the operating efficiency to be far lower than the declared efficiency, and the operating efficiency is generally around 85%. | High, the operating efficiency is generally 90%~94% typical | High,generally adopt low-load design,the typical value is 95%.The operation efficiency can reach 96% when the module N+X redundant configuration |
|
Efficiency |
Low, low load rate and harmonic control measures cause the operating efficiency to be far lower than the declared efficiency, and the operating efficiency is generally around 85%. |
Higher,the efficiency will be improved after the transformer is cancelled. | Higher, generally higher efficiency,easier to achieve greater power density |
| Power density | Low, the built-in transformer is used to boost the voltage and generate the neutral line, and the power density is difficult to increase | Higher,the efficiency will be improved after the transformer is cancelled. | Higher， generally higher efficiency, easier to achieve greater power density |
| Intelligent degree | Depends on the design, but the main manufacturers of power frequency UPS have stopped research and development in recent years,and the degree of intelligence is relatively low | depends on design | Depends on design. Generally, it is a high-end product of various manufacturers, with a high degree of intelligence |
| Matching degree | Mismatch | nerally | match |
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