Leading Phase Operation Principle of Cummins Diesel Generator Set

The leading phase operation of Cummins diesel generator unit refers to the situation that the phase of current is ahead of the phase of voltage during the operation of the unit. At this time, Cummins diesel generator sets send active power and absorb inductive reactive power (or send capacitive reactive power) to the system.

When the reactive power of the power system is excessive, the voltage of the whole system will rise. One of the measures to reduce the voltage is to let Cummins diesel generator set absorb the excess reactive power of the system and let it operate in the leading phase state. The more absorption, the deeper the phase advance. In general, Cummins diesel generator set has also considered this unfavorable operation condition for the generator in the design, allowing Cummins diesel generator set to operate in a short period of leading phase.

When the Cummins diesel generator set enters the phase, especially the deep phase, the unit maintenance shall specially check whether the upper and lower ends of the generator stator winding, especially the iron core tooth top, the slot of the winding bar and the pressure finger are abnormal. Problems found shall be reported and handled in a timely manner, and generators that are not suitable for phase leading operation shall apply for stopping. The adverse effects on Cummins diesel generator set are relatively complex, which may require long-term operation to find the problem.

Different Cummins diesel generator sets may also show great differences in leading phase operation. In addition, attention should be paid to the problem of unit temperature rise. After the Cummins diesel generator set is in phase leading operation, the magnetic leakage at the end of the generator is increased compared with that under normal conditions, so that the metal parts at the end are heated and the local temperature is increased. At the same time, the end vibration is also increased. The greater the phase leading depth is, the higher the end temperature rise of Cummins diesel generator set is.

Jiangsu Starlight Power Generation Equipment Co., Ltd. was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. The company has a registered capital of 218.88 million yuan. The company covers an area of 86,000 square meters and a building area of 55,000 square meters. There are more than 660 employees, including 456 professional technicians and 106 senior technicians. It has 46 sales and service outlets nationwide. The main products are diesel engines, generator sets, and diesel generators, providing users with a one-stop service of design, supply, debugging and maintenance at any time. Starlight has always insisted on using first-class talents, building first-class enterprises, manufacturing first-class products, creating first-class services, and making every effort to build a first-class domestic enterprise. If any question please feel free to visit our website https://www.dieselgeneratortech.com/ or send email to sales@dieselgeneratortech.com.