What are the conditions for parallel operation of two generator sets? What device is used to complete the parallel operation
Published:
2023-03-17
The condition for parallel operation is that the instantaneous voltage, frequency, and phase of the two machines are the same. Commonly known as "three simultaneities". Use a dedicated parallel device to complete the parallel operation. It is generally recommended to use fully automatic cabinet merging. Try not to manually merge the machines. Because the success or failure of manual parallel operation depends on human experience. Based on more than 20 years of experience in electric power work, the author boldly states that the reliable success rate of manual parallel operation of diesel generators is equal to 0. The concept that a large power supply system can be manually connected to a small power supply system cannot be applied because the protection levels of the two systems are completely different.
1.The condition for parallel operation is that the instantaneous voltage, frequency, and phase of the two machines are the same. Commonly known as "three simultaneities". Use a dedicated parallel device to complete the parallel operation. It is generally recommended to use fully automatic cabinet merging. Try not to manually merge the machines. Because the success or failure of manual parallel operation depends on human experience. Based on more than 20 years of experience in electric power work, the author boldly states that the reliable success rate of manual parallel operation of diesel generators is equal to 0. The concept that a large power supply system can be manually connected to a small power supply system cannot be applied because the protection levels of the two systems are completely different.
2. What is the power factor of a three-phase generator? Can a power compensator be added to improve the power factor?
Answer: The power factor is 0.8. No, because the charging and discharging of capacitors can cause fluctuations in small power supplies. And unit oscillation.
3. Why do we require customers to perform a fastening work on all electrical contacts after every 200 hours of unit operation? Answer: The diesel generator set is a vibration generator. Moreover, many domestically produced or assembled units should use double nuts without use. The use of spring gaskets is useless. Once the electrical fasteners are loosened, a large contact resistance will occur, resulting in abnormal operation of the unit.
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