Does the actual load capacity of diesel generators meet the load requirements

After the installation of a diesel generator set, its nominal capacity is fixed and unchanged, but the load capacity that the diesel generator needs to ensure power supply is constantly changing. Therefore, as maintenance personnel, it is important to pay attention to synchronously measuring and calculating the capacity of the diesel generator based on load changes to ensure power supply. It is important to have a clear understanding in advance to avoid the problem of the diesel generator's load capacity not meeting the load requirements when emergency power supply is truly needed.

The load capacity of diesel generators should include the following parts: communication power load, including switch power supply and UPS load; Charging power of switch mode power supply and UPS battery pack; Ensure no load; It ensures load, such as fire protection, elevators, lighting, and so on. The charging power of the communication power battery pack must be guaranteed, and the ratio of diesel generator capacity to UPS capacity must be appropriate. These two points are easily overlooked by maintenance personnel, who often believe that the guaranteed load current displayed on the distribution cabinet meter during mains power supply is the actual load current of the oil engine, but in reality, this is not the case. Maintenance personnel need to pay special attention to the explicit and implicit insufficient capacity of diesel generators.

Explicit deficiency: In the initial stage of construction, the capacity of diesel generators generally meets the requirements, but as the guaranteed load increases, the generator capacity cannot meet the guaranteed load power supply. After noise reduction treatment, the load capacity of the diesel generator room will be reduced by about 5%, which also needs to be considered.

Implicit deficiency: The capacity of diesel generators may seem to meet the demand for guaranteed load in hub buildings, but in reality, when there is a power outage in the city, it is impossible to supply power with guaranteed load; The impact of harmonics; Insufficient oil storage capacity, unable to support long-term operation of the oil engine; The influence of altitude and ambient temperature.