How to properly start the diesel generator set

How to properly start the diesel generator set

First, preparation before starting.

It is necessary to check whether the cooling water or antifreeze in the diesel water tank is satisfied before starting up. If it is missing, it should be filled up. Pull out the oil oil gauge to check if the lubricant is missing. If it is missing, add it to the specified “quiet” scale line, and then carefully check the relevant parts for potential troubles. If the fault is found, it should be removed in time to start.

Second, it is strictly forbidden to start the diesel engine with load.

Before starting the diesel engine, be aware that the output air switch of the generator must be in the off state. After the diesel engine of the ordinary generator set starts, it will take 3-5 minutes of idle operation (about 700 rev / min). The winter temperature is low, and the idle running time should be extended for a few minutes. After starting the diesel engine, first observe whether the oil pressure is normal and whether there is abnormality such as oil leakage or water leakage. (Under normal conditions, the oil pressure must be above 0.2 MPa.) If abnormalities are found, stop the maintenance immediately. If there is no abnormality, the diesel engine speed will be increased to the rated speed of 1500 rev / min. At this time, the generator display frequency is 50HZ and the voltage is 400V, then the output air switch can be put into use. The generator set does not allow long-term no-load operation. (Because the long-term no-load operation will cause the diesel fuel injected from the diesel injector to not completely burn, resulting in carbon deposits, resulting in air leakage from the valve and piston ring.) If it is an automatic generator set, there is no need for idle operation because the automatic unit is generally Equipped with water heater, the diesel engine cylinder is always maintained at about 45 °C, and the diesel engine can be powered normally within 8-15 seconds after starting.

Third, pay attention to observe the working state in operation.

In the work of the generator set, there must be a person on duty, and often pay attention to observe a series of faults that may occur, especially pay attention to changes in important factors such as oil pressure, water temperature, oil temperature, voltage and frequency. In addition, it should be noted that there is enough diesel fuel, such as fuel interruption during operation, and objectively causing the load to stop, which may cause damage to the generator excitation control system and related components.

4. It is strictly forbidden to stop with load.

Before each stop, the load must be gradually cut off, then the genset output air switch is turned off, and the diesel engine is decelerated to idle speed for 3-5 minutes and then stopped.

The following are the safe operating procedures:

1. For diesel-powered generators, the operation of the engine section is carried out in accordance with the relevant regulations of the internal combustion engine. 2. Before starting the generator, it is necessary to carefully check whether the wiring of each part is correct, whether the joint parts are firm, whether the brush is normal, whether the pressure meets the requirements, and whether the grounding wire is good.

3. Before starting, put the resistance of the field varistor in a considerable position, disconnect the output switch, and the generator set with the clutch should disengage the clutch. Start the diesel engine with no load and start the generator after running smoothly. 4. After the generator starts running, always pay attention to whether there is mechanical noise or abnormal vibration. After confirming that the situation is normal, adjust the generator to the rated speed, adjust the voltage to the rated value, and then close the output switch to supply power. The load should be gradually increased to strive for three-phase balance.

5. The parallel operation of the generator must meet the same frequency, the same voltage, the same phase, and the same phase sequence.

6. Generators that are to be operated in parallel must have entered normal and stable operation.

7. After receiving the signal of “preparing for parallel connection”, the whole unit shall be used as the standard to adjust the speed of the diesel engine and close at the synchronous moment.

8. Generators operating in parallel should adjust the load reasonably and distribute the active power and reactive power of each generator in a balanced manner. The active power is regulated by the diesel throttle and the reactive power is regulated by the excitation.

IX. The generator in operation should pay close attention to the engine sound and observe whether the various instrument indications are within the normal range. Check if the running part is normal and the generator temperature rise is too high. And do a good job record.

10. When parking, first reduce the load, return the excitation varistor, reduce the voltage to a relatively small value, then cut off the switch in sequence, and stop the diesel engine after the Zui.

XI. If the diesel engine in parallel operation needs to stop one because of the load drop, the load of one generator that needs to be parked should be transferred to the generator that continues to run, and then stopped by the method of single generator parking. . If all parking is required, the load will be cut off first, and then the single generator will be shut down.

12. Mobile generators must be parked on a stable foundation before use and are not allowed to move during operation.

13. When the generator is running, it should be considered to have voltage even if it is not excited. It is forbidden to work on the rotating generator lead-out line and touch the rotor or clean it by hand. Generators in operation must not be covered with canvas or the like.

14. After the generator is overhauled, it is necessary to carefully check whether there are tools, materials and other debris between the rotor and the stator slot to avoid damage to the generator during operation.

15. All electrical equipment in the equipment room must be reliably grounded.

16. It is forbidden to pile up sundries and flammable and explosive materials in the engine room. Except for the on-duty personnel, other personnel are prohibited from entering without permission.

17. The necessary fire-fighting equipment should be provided in the room. When a fire accident occurs, the power should be stopped immediately, the generator should be turned off, and the carbon dioxide or carbon tetrachloride fire extinguisher should be used to save the fire.