Investigation on Performances and Functions of Power Emergency Diesel Generators

In emergency repair of sudden disasters, the reliability and stability of emergency power generators largely determine the quality and efficiency of power supply restoration. According to China’s national standards and relevant technical regulations, the performance and function of 39 power emergency diesel generators in service in a power supply bureau are studied. The research found that after 4–9 years of service, nearly 40% of the steady or transient output voltage deviation was too large, nearly 70% of the transient frequency deviation was too large, and 25% of the diesel power generators could not operate continuously with rated load for a long time. The deterioration of the performance of diesel power generators has seriously affected the quality and reliability of emergency power supply, which brings hidden dangers to emergency power supply. More attention should be paid to the detection and maintenance of diesel power generators.