Overview of maintenance for Volvo generator sets

Volvo generators, like cars, need to be used frequently. If not used frequently, problems may occur if left unused for a long time. Below is a brief introduction to the maintenance and use of diesel generators:

Volvo, also known as Rich, is a famous Swedish brand founded in Gothenburg, Sweden in 1927 by Gustav Larsson and Asal Gabrielsson. The Volvo diesel generator set adopts the original imported Swedish VOLVO engine, which is highly favored by global customers for its reliable performance, strong horsepower, green and environmentally friendly, and user-friendly safety design. And it is widely used in the power parts of automobiles, construction machinery, ships, etc.

1. There are differences between voltage regulation and frequency regulation: in a system, the frequency values are consistent regardless of region, and the balance of active power is also the power balance of the entire system; The voltage level is inconsistent in different electricity consumption areas, and reactive power balance is mainly achieved in different areas. The ability of power plants to regulate voltage can only be within a relatively small area around it

2. Multiple Volvo generator units are operating in parallel. When using the above method to regulate one unit, the effect on system frequency and voltage is not significant. The main purpose is to regulate the load distribution between units, especially for small units in large systems. The output size will not have a substantial impact on voltage and frequency, and the units can be adjusted as needed. Therefore, the regulation of small generators operating in grid connection is much simpler

When maintaining the active output of the generator unchanged, changing the excitation can change the reactive output and power factor of the generator; When the excitation current remains constant, increasing the active output will decrease the reactive output of the generator. If it is necessary to keep it from decreasing, the excitation must be increased accordingly

When operating at low power factor, it will inevitably increase the burden on the excitation system. In order to not exceed the excitation current at full load rated conditions, the output of the generator (kW and kVA) should be limited. To ensure stable operation of the generator and maintain a certain stability margin between parallel motors, the excitation of the generator should be controlled to avoid leading phase operation. The excitation current should not be reduced too small, and measures should be taken to prevent demagnetization

4. The excitation system not only plays a very important role in the operation of the generator, but also is the weakest and most prone part of the generator in terms of structure. Therefore, to ensure power generation safety, sufficient attention must be paid to the excitation system. Necessary inspections must be carried out after shutdown and before startup, especially for the brush device of the coaxial excitation machine. The technical condition of the brushes, brush holders, and commutator surface should be checked, and if necessary, blowing should also be carried out; During operation, it is necessary to regularly check whether the electric brush catches fire and jumps; Strengthening the inspection, maintenance, and upkeep of the excitation system is one of the important means to prevent generator failures

Another characteristic of the backup Volvo generator set is "raising soldiers for a thousand days, used in one day". Therefore, when it is idle and not in use, it is very likely to get damp. The most proactive preventive measure is to ask the manufacturer to moisture-proof the winding insulation