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

Diesel generator sets that need to operate for a long time during a fixed period are called commonly used diesel generator sets. There are three major difficulties in purchasing such equipment, namely, determining the capacity, number of units and speed of the unit. As a professional power generation equipment manufacturer, Haixing Power provides the following suggestions.

1. Determination of capacity of commonly used diesel generator sets

The output power according to the long-term continuous operation of the unit can meet the load selection of the entire project, and the capacity of the generator set backup unit should be determined based on the importance of the load. The continuous output power of the diesel engine is generally 0.9 times the calibration 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 units to ensure the continuity of power supply and adapt to changes in the applied electrical load curve. Only when there are many units, the number of units that can be determined according to the changes in the power load can be determined, so that the diesel engines are often operated under economic load to reduce fuel consumption and reduce power generation costs. The economic operating state of the diesel engine is between 75% and 90% of the calibration power. In order to ensure the continuity of power supply, the commonly used units should consider setting up backup units. When the unit fault maintenance or shutdown inspection is carried out, the generator set can still meet the continuous power supply to important power loads.

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 sets should choose medium and low speed units with a calibrated speed not exceeding 1000r/min, and their spare units can be selected as medium and high speed units. Units of the same power station should be selected from the same model and capacity to use the same spare parts for easy maintenance and management. For projects with large load changes, units with different capacity can also be selected in the same series. The determination of the output calibration voltage of the generator is the same as that of the emergency generator set, generally 400V. In some projects with large electricity consumption and long transmission distance, high-voltage generator sets can be used.

In the procurement of diesel generator sets, Haixing Power recommends that you examine the market reputation and brand image of the manufacturer more and choose trustworthy suppliers to cooperate. If you can master some basic procurement skills in advance, you can avoid the traps of bad merchants, purchase suitable power generation equipment, and learn more about procurement information. Everyone is welcome to follow the content regularly pushed by Haixing Power WeChat platform.