How to determine the capacity, number and speed of commonly used diesel generator sets during procurement

Diesel generator sets that need to operate for a fixed period of time for a long time are called common diesel generator sets. There are three major difficulties in the purchase of this type of equipment, which is to determine the capacity, number and speed of the units. As a professional power generation equipment manufacturer, Haixing Power gives the following suggestions.

1. Determination of the capacity of commonly used diesel generator sets

According to the long-term continuous operation of the unit, the output power can meet the calculated load selection of the entire project, and the backup unit capacity of the generating unit should be determined according to the importance of the load. The continuous output power of a diesel engine is generally 0.9 times the calibrated power.

2. Determination of the number of commonly used diesel generator sets

The number of commonly used diesel generator sets is usually more than 2 to ensure the continuity of power supply and adapt to changes in the power load curve. Only with a large number of units can the number of generator units invested can be determined according to changes in electrical load, so that the diesel engine can often run under economic load to reduce fuel consumption and power generation costs. The economic operating state of the diesel engine is between 75% and 90% of the rated power. In order to ensure the continuity of power supply, the commonly used unit itself should consider setting up a backup unit. When the unit is faulty or shut down for inspection, the generator set can still supply power to important electrical loads without interruption.

3. Determination of the speed of commonly used diesel generator sets

In order to reduce wear and increase the service life of the unit, commonly used generator units should choose medium or low-speed units with a calibrated speed of no more than 1000r/min, and medium or high-speed units can be selected as backup units. Units in the same power station should use units of the same model and capacity so that they can use the same spare parts and facilitate maintenance and management. For projects with large load changes, units of the same series with different capacities can also be selected. The determination of the generator output calibration voltage is the same as that of the emergency generator set, which is generally 400V. High-voltage generator sets can be used for projects with large power consumption and long transmission distances.

When purchasing diesel generator sets, Haixing Power recommends that you examine the market reputation and brand image of the production company and choose a trustworthy supplier to cooperate with. If you can master some basic purchasing skills in advance, you can avoid the traps of unscrupulous merchants, purchase suitable power generation equipment, and learn more purchasing information. Everyone is welcome to pay attention to the content pushed regularly by Haixing Power's WeChat platform.