一般来说，应急柴油发电机的选择应该着眼于 应急柴油发电机主要用于重要场所，在紧急情况或事故停电后瞬间停电，通过应急发电机组迅速恢复”这一基本原则，应急柴油发电机的工作有两个特点： 第一是作应急用，启动效果必须要好，但连续工作的时间不长，一般只需要持续运行几小时（≤12h）；第二个特点是作备用，应急发电机组平时处于停机等待状态，只有当主用电源全部鼓障断电后，发电机组才起动运行并供给紧急用电负荷，当主用电源恢复正常后，随即切换停机。因此，针对这两个特点，山东赛马力也对合理选用应急机组提出了针对性的建议。
Generally speaking, the choice of emergency diesel generator should focus on the emergency diesel generator is mainly used in important places, in case of emergency or accident interruption after momentary power failure emergency generator, through the rapid recovery of the basic principle of emergency diesel generator work has two characteristics: the first is for emergency, start effect must be better, but for the working time is not long, generally only need a few hours of continuous operation (12h); the second is for backup, emergency generator in a normal shutdown wait state, only when the main power supply for all drum power generating units to avoidance, starting operation and emergency supply of electricity load, when the main power supply back to normal then, stop switch. Therefore, in view of these two characteristics, the Shandong race horse force also put forward the pertinent suggestion to the rational selection of emergency units.
First, the determination of the capacity of the emergency diesel generator set. The calibration capacity of the emergency diesel generator set is calibrated by the atmospheric corrected 12h. The capacity of the emergency diesel generator set can meet the total load of the emergency electricity. According to the generator capacity, it can meet the requirements of the maximum capacity of the single motor in the first stage load. The three phase AC synchronous generator is generally used for the emergency generator, and its calibration output voltage is 400V.
Two. The determination of the number of emergency diesel generator sets. When there are several diesel generators in reserve, only 1 units are set up as emergency units. From the reliability consideration, 2 units can be used in parallel to supply power. The power supply emergency units in general should not be more than 3 taiwan. When multiple units are selected, the units should try to choose the complete set of equipment with the same type, the same capacity, the same speed regulation and speed regulation characteristics, and the fuel properties should be consistent so as to maintain and share spare parts. When the supply of emergency generator 2, self starter should make 2 units to spare to each other, i.e. power failure after the delay confirmation, a self starting instruction, if the first units for 3 times since the start of failure, should send the alarm signal and automatically starting second diesel generators.
Three. The performance of the emergency diesel generator set. The emergency unit should choose the diesel generating set with high speed, supercharging, low fuel consumption and the same capacity. The capacity of single machine high speed turbocharged diesel engine is large, small occupying space; selection of diesel engine with electronic control device, good control performance; the generator should be used with brushless excitation synchronous motor, more reliable, low failure rate, convenient maintenance and repair; the exhaust pipe outlet should be installed muffler, to reduce the noise influence on the surrounding environment.