What are the conditions for parallel operation of two generator sets? What equipment is used to complete the parallel operation?

The condition for parallel operation is that the voltage, frequency and phase of the two generators are the same at the moment. It is commonly known as "three simultaneous". Use a special parallel device to complete the parallel work. It is generally recommended to use a fully automatic parallel cabinet. Try not to use manual paralleling. Because the success or failure of manual paralleling depends on human experience. With more than 20 years of experience in power work, the author dares to say that the reliable success rate of manual paralleling of diesel generators is equal to 0. The concept of manual paralleling for large power systems of the mains must not be applied to small power systems, because the protection levels of the two are completely different.