Diesel generator and Online UPS（Uninterruptible Power Supply） matching solution

Generally, diesel generators distribute power to UPS systems, due to UPS interference such as harmonic feedback and sudden changes in load current, the ratio given by the design institute is 3:1, which means the capacity of the diesel generator needs to be 3 times the maximum load of the UPS.  But in fact, in GDS, CICC Data, and actual interconnected data centers, the optimal  ratio between diesel generators and UPS is 2 or 1.5:1, which not only reduces the cost but also improves energy utilization.

When the UPS is used in conjunction with a generator, only a small amount of backup battery is needed for the UPS to prepare for switching.( Back-up time can be 5 to 15 minutes).  The conversion between the generator and the mains power can be done manually or with an automatic switching device (ATS). When the mains fails, the automatic switching device (ATS) will automatically switch to the generator, and the generator will automatically start after a certain time delay to provide power protection.

In practical applications, different customers have different availability requirements for the power supply system, so the configuration methods of UPS and generators are also different. The following are the most common and economical options.

As shown in the figure, the diesel generator is used as the backup power supply of the mains. When the mains power fails, since the generator takes a certain time to start and cannot provide instantaneous power, the UPS uses the battery to provide uninterrupted power supply. Shenzhen SST Power UPS is with ZERO Switch Time, it can play a very good role in protecting the user's load equipment. After the generator is running stably, the input of the UPS is switched from the mains to the generator to prevent the system power supply from being interrupted due to battery exhaustion. This solution can effectively solve the problem of instantaneous power outages and long-term power outages and ensure the continuity of equipment work. 

We have just shipped a 200KVA/160KW low frequency online UPS, equipped with a diesel generator, providing customers with a perfect solution and effectively protecting their load equipment.

If you want to know more about UPS performance or supporting solutions, please contact our sales to learn more.

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