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What are the disadvantages of dual-computer redundancy in improving the reliability of UPS power supply system? Dual-machine redundancy means backup. If one machine has problems, the reliability of the UPS power supply system will be improved. Generally, two or more single units are used to form a dual or multi-unit UPS system to improve the reliability of power supply, so that when a single UPS fails, the UPS will not interrupt the power supply.

What are the disadvantages of dual-computer redundancy in improving the reliability of UPS power supply system?

1. Unable to switch, resulting in output interruption

When the internal power board or power module of the UPS power supply fails, the UPS power supply will immediately stop working and the output will be interrupted. At this time, UPS can no longer turn from static switch to bypass. This happens on the main UPS power supply machine. At this time, even if the UPS power supply is good or useless, the power supply of the entire computer system will be interrupted. When there is a problem in the UPS power supply control circuit, the inverter may burn out instantaneously and for some other reasons, and the static switch may not be opened, resulting in interruption.

2. Intermittent switching instantaneous output

In order to ensure the continuity of the output waveform, UPS adopts the technology of making before breaking, that is, there is a superposition process between the bypass and the inverter output through the static switch to ensure that the output is uninterrupted, but the two circuits of voltage must meet the requirements of frequency, phase and voltage amplitude, otherwise, the output may not be continuous during the switching process.

3. In the power supply system, two common fault points are added

Once the static switch of the main UPS fails, and the switch is required at this time, the load power supply will be interrupted. In case of overload, the master/slave UPS will turn to bypass in turn. At this time, if there is a problem with the static switch of the UPS, the output will also be interrupted.

4. Low equipment efficiency

During the whole power supply process, there is always a UPS that has been idle for a long time, with low efficiency. In addition, the battery of the backup UPS is in the floating charge state for a long time, and the battery cannot be discharged. The battery life is greatly shortened.

5. Difficulty in maintenance

When the host fails and switches to the slave power supply, the user load cannot be stopped and the UPS power cannot be turned off for maintenance. Once the slave machine fails, the whole power supply system will be interrupted.

Advantages of redundant parallel UPS power supply

In the parallel redundant UPS system, all single UPS operate in parallel and share the load in normal operation. If a single UPS fails or needs to be disconnected from the system for maintenance, the other single UPS has enough capacity to supply the load, which can ensure the uninterrupted power supply of the load, so it is not necessary to switch the load to the bypass power supply.

The dual-computer redundant UPS power supply system has stable performance and obvious economic benefits. In this 1+1 system, two UPS are redundant to each other. When one UPS breaks down, the other UPS can bear all the loads.

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