estimation of the capacity of commonly used diesel generator sets is selected according to the long-term continuous operation output power of the unit to meet the large calculated load of the whole project, according to the provisions of China's standard GB1105.1-1987 "Internal combustion engine bench performance test method, standard environmental working conditions and power, fuel consumption and oil consumption calibration", in the standard environment (atmospheric pressure = 100kPa, relative temperature = 30%, ambient temperature = 298K or 25 °C, intercooler cooling medium inlet temperature = 298K or 25 °C. Under the conditions, the diesel engine allows continuous operation of the calibration power for 15 minutes. When the ambient humidity and altitude are too high, the air density is reduced, the supply of oxygen required for combustion when the unit is running is reduced, and the output power of the unit should be adjusted accordingly. In other words, the power of the selected unit is higher than the power value of the load, that is, when the unit works under non-standard conditions, the power correction of the diesel engine should be carried out.
the output power of the diesel generator set in continuous operation under the conventional environment, generally 0.9 times the rated power. If the capacity of the unit is selected too small, it cannot drive all the load or cause sudden shutdown when starting the high-power load; If the capacity of the unit is selected too large, the investment and maintenance costs are high, resulting in waste of resources. Moreover, according to the characteristics of the diesel engine, when it works in a small load for a long time, it will cause serious carbon deposits at the engine piston rings, fuel injection nozzles, etc., and the adverse consequences of damaging the unit such as increased cylinder wear.
diesel generator set in the working process, resistive loads such as light bulbs, electric stoves and ovens and other small and medium-sized household appliances, inductive loads such as machine tools, water pumps and other large electrical equipment, in which the characteristics of resistive loads are basically unchanged, but the current decreases proportionally with the voltage, so for different loads of electrical equipment, the capacity of diesel generator sets needs to be recalculated.