As we all know, in order to prolong the service life of diesel generator set, it is necessary to repair the failure of diesel generator set in time. However, some users think that some minor glitches do not affect the use of the device, so they ignore them until the device fails, which is quite incorrect.
1. If the diesel generator set is not repaired in time, the number of turns of the stator winding will be short-circuited, and the circuit current will be generated under the action of short-circuit voltage, which may cause the inter-turn short circuit to develop into single-phase grounding short circuit and interphase short circuit. When the stator winding polyphase short circuit, it will do great harm to the unit, and the short circuit current will cause the unit to burn out. 2. If the diesel generator set is not repaired in time, the excitation current will drop sharply or disappear, the generator will absorb a large amount of reactive power from the system, and the generator will change from synchronous operation to asynchronous operation, which will cause the system voltage to drop, and even cause the system to crash.
3. If the diesel generator set is not repaired in time, the excitation circuit will be grounded. Generator excitation circuit: one point ground and two point ground there are two ground conditions. Generally speaking, there is no serious harm to the generator when a little ground occurs in the excitation circuit. However, if the generator is not repaired in time, it may lead to ground at two points, destroy the balance of the rotor flux, cause strong vibration of the generator, and eventually burn out the rotor winding.
4. If the diesel generator set is not repaired in time, the unit will be overvoltage. When the generator suddenly loses load during operation, if the generator is not repaired in time, overvoltage may occur due to the large inertia of the speed control system, leading to the breakdown of the insulation layer of the generator set.
5. If the diesel generator set is not repaired in time, the unit will be overloaded. Generator overload means that the generator is operating at more than its rated capacity. If the generator is not repaired in time, overload operation for a short time will cause the temperature of the stator winding of the generator to rise, accelerate the aging of the insulation part, and shorten the service life of the generator. If it is overloaded for a long time, it may cause the stator windings of the generator to burn out and eventually cause the generator to fail to generate power.
6. If the diesel generator set is not repaired in time, the stator will have overcurrent. Stator overcurrent is usually caused by an external short circuit or system oscillation. If the generator is not repaired in time, the stator temperature of the generator will rise slightly, which will accelerate the aging of the insulation part of the winding. When it’s serious, it can lead to other mistakes. In order to prevent the occurrence of the above faults, the user should stop the machine as soon as the fault is discovered, regardless of the size of the fault, and repair the equipment before it is put into service. In addition, the diesel generator set can be equipped with corresponding protection devices to better protect the unit.
Post time: Apr-20-2023