1. It is necessary to eliminate the common shortcomings of the system solution so that the system operation will be bottleneck-free. For example, advanced relaxed control technology can be used to deal with the circulation problem of parallel modules, so that the UPS system is not bound by the reliability of centralized control and prevents the occurrence of bottleneck defects. EPS power supply remote monitoring 2. When multiple modules are connected in parallel, the most important goal is current sharing. That is to say, if N UPS modules are connected in parallel, it must be ensured that the output current of each modular UPS is the total output current. 1/N, at least the maximum imbalance between them must be within the required range. 3. Energy conservation and consumption reduction are the biggest problems encountered by data centers today. In addition to availability, the UPS system that ensures the power supply of the data center must be high-efficiency, pollution-free, and low energy consumption. 4. Completely modular. Each module is an intelligent independent unit. A defect in any module will not affect the normal operation of other modules. It can exit the system by itself without affecting the operation of the entire system. 5. All UPS in the system share the battery pack. Use one battery or multiple batteries in parallel to increase system backup time. Modular UPS technology: decentralized bypass and centralized bypass 1. Decentralized bypass architecture decentralized bypass architecture, that is, each power module contains rectifier, inverter and battery conversion parts, as well as a static bypass equal to the capacity of the power module. road, it can be considered as a UPS without LCD monitoring. Multiple modules are connected in parallel in the cabinet to form a system, and the relationship between the modules is similar to the traditional multi-parallel UPS system. When the system switches to bypass power supply, the load is powered in parallel by distributed bypasses in all power modules. The advantages of the decentralized bypass solution are: simple control and low development difficulty, only the original parallel system needs to be transplanted and the monitoring part is optimized; the cost of the cabinet is low; the cost of the bypass device is relatively low because of its small capacity; static The bypass has multi-channel redundancy. The centralized bypass scheme is a technical route developed after decentralized bypass. Compared with the traditional parallel system, it has made great changes in terms of parallel current sharing control, system logic coordination, and fault tolerance. It can be said to be a brand new In the technical field, development is difficult. Centralized bypass architecture, the system has only one centralized bypass module with the same capacity as the system. The power module only contains rectifier, inverter and battery conversion circuits. Each part is controlled by an independent controller. Parallel connection between modules is no longer a traditional The UPS parallel system contains complex inverter current sharing, bypass control and monitoring logic. The modular UPS centralized bypass solution is a technical route developed after decentralized bypass. Compared with the traditional parallel UPS system, it has made great changes in terms of parallel current sharing control, system logic coordination, and fault tolerance. It can be said that It is a brand new technical field and is difficult to develop. Through the above analysis, I hope that everyone can further understand the differences in system comprehensive performance and product reliability between the two modular solutions. For UPS manufacturers, the choice of technical route is of great significance. Once the route is determined, product development will not be able to change midway, and subsequent product series will also continue. This is why no matter how the industry develops, manufacturers with decentralized bypass still cannot switch to another. One camp.

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