The mechanical and electrical performance of the diesel generator set, the use of the generator set, the capacity and variation range of the load, the environmental conditions of the generator set (including altitude, climatic conditions, noise), and automation functions are all factors that users should consider when choosing a diesel generator set. the elements of. Since diesel generator sets can be used in three situations: common use, standby and emergency, the requirements for diesel generator sets are different for different purposes.
The mechanical and electrical performance of the diesel generator set, the use of the generator set, the capacity and variation range of the load, the environmental conditions of the generator set (including altitude, climatic conditions, noise), and automation functions are all factors that users should consider when choosing a diesel generator set. the elements of. Since diesel generator sets can be used in three situations: common use, standby and emergency, the requirements for diesel generator sets are different for different purposes. So how should users choose the type of diesel generator set correctly?
1. Selection of standby diesel generator sets
When the calculated load after multiplying the demand factor by the sum of the load capacity is less than the capacity of the emergency diesel generator set, the reserve factor shall be considered as 1.2, that is, 1.2 times the calculated capacity is less than the capacity of the emergency diesel generator set. The unit supplies power to the load. When the calculated load after the sum of the load capacity multiplied by the demand factor is greater than the capacity of a single emergency diesel generator set, two automatic generator sets with the same model, the same capacity, and similar voltage regulation and speed regulation characteristics can be selected. After the mains power outage, one or two of the units will supply power to domestic and commercial electricity; when the mains power outage occurs and a fire occurs, the two units will supply power to the fire-fighting load to facilitate firefighting.
2. The choice of emergency diesel generators.
Emergency diesel generators should generally use high-speed, supercharged, low fuel consumption, and the same capacity diesel generator sets. The high-speed supercharged diesel engine has a large single unit capacity and occupies a small space; the diesel engine is equipped with an electronic or hydraulic speed control device, and the speed control performance is better; the generator should choose a synchronous motor equipped with a brushless excitation or a phase compound excitation device, which is more reliable. Low efficiency, easy maintenance and repair; when the capacity of a single air conditioner or motor in the primary load is large, a generator set with third harmonic excitation should be selected; the generator set is assembled on a common chassis with shock absorbers; smoke exhaust Mufflers should be installed at the pipe outlet to reduce the impact of noise on the surrounding environment.
3. Selection of commonly used diesel generator sets.
Commonly used generator sets continue to work for a long time, and the load curve changes greatly. The selection of unit capacity, number and type and the control method of units are different from those of emergency units.
