Today, we will briefly introduce the control of automatic Volvo diesel generator.
The control of emergency Volvo diesel generator shall be equipped with fast self-starting and automatic input device. When the main power supply is cut off due to fault, the emergency Volvo diesel generator shall be able to quickly start and resume power supply. The allowable power off time of the first level load is from ten seconds to tens of seconds, which shall be determined according to the specific situation. When the main power supply of an important project is powered off, the time shall be determined by 3 to 5 seconds to avoid the transient voltage reduction and the time when the municipal power grid is switched on or the standby power supply is automatically switched on, and then the command to start the emergency Volvo diesel generator shall be issued.
It takes a period of time from the command is sent, Volvo diesel generator starts to start, speed up to full load. Generally, large and medium-sized diesel engines also need pre-lubrication and warm-up process, so that the oil pressure, oil temperature and cooling water temperature in case of emergency loading meet the provisions of the factory product technical conditions; The pre-lubrication and warm-up process can be carried out in advance according to different conditions.
For example, the emergency Volvo diesel generator for military communications, important foreign affairs activities in large hotels, large-scale mass activities in public buildings at night, and important surgical operations in hospitals should be in the pre-lubrication and warm-up state at ordinary times, so that it can be quickly started at any time, and the outage time of the fault can be minimized.
After the automatic Volvo diesel generator is put into operation, in order to reduce the mechanical and current impact when sudden load is applied, it is better to increase the emergency load according to the time interval in order to meet the power supply requirements. According to the provisions of national standards and national military standards, the first allowable load of automatic Volvo diesel generator after successful starting is as follows: for the rated power not greater than 250KW, the first allowable load is not less than 50% of the rated load; If the rated power is greater than 250KW, it shall be in accordance with the technical conditions of the factory. If the requirements for transient voltage drop and transition process are not strict, the load suddenly added or suddenly unloaded by Volvo diesel generator should not exceed 70% of the rated capacity of Volvo diesel generator.
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