Protection Principle of Stator Winding of Diesel Generator Set

Have you analyzed the working principle and composition of the protection of the stator winding of diesel generator sets? Due to the differential protection of diesel generator sets being unable to protect against short turn faults in the stator winding, if a short turn fault occurs and cannot be dealt with in a timely manner, it may develop into a phase fault, causing significant damage to the diesel generator set. Therefore, generator set stator turn short circuit protection is installed in large diesel generator sets, At the same time, it can also protect the stator winding from wire breakage faults. The working principle and composition of stator winding protection, as well as the transverse inspection protection of double star connection. Principle of zero sequence voltage of stator winding. Negative sequence power direction blocking rotor second harmonic current inter turn short circuit protection. The inter turn short circuit of the engine is completed by the negative sequence overcurrent protection action.

Negative sequence overcurrent protection refers to the occurrence of asymmetric short circuits and inter turn short circuits during the operation of diesel generator sets, resulting in unbalanced three-phase potential of the diesel generator set and generating negative sequence current overcurrent in the stator of the generator set, causing surface heating of the rotor. The negative crude current of diesel engines shall not exceed 8% IN. Due to the fact that the longitudinal differential protection does not respond to a phase to turn short circuit in the stator winding of the generator set, if the fault cannot be promptly addressed after a phase to turn short circuit in the stator winding of the diesel generator set, it may develop into a phase to phase fault, causing serious damage to the diesel generator set. Therefore, inter turn short circuit protection should be installed on generator sets, especially large diesel generator sets.

Since 1982, Dingbo Generator has been a generator set manufacturer qualified by the "National Internal Combustion Engine Quality Supervision and Inspection Center". The product quality has passed the IS09001 quality system standard certification. And obtained the qualification certificate for self-operated import and export. Over the years, Dingbo units have been widely used in all walks of life, and have won the network access qualification of the Ministry of Information Industry, the network access qualification of the Ministry of Radio and Television, the network access qualification of CNPC, the network access qualification of China Mobile, and the manufacturing qualification of marine units. In 2016, Dingbo was awarded the Certificate of Qualified Supplier of China Nuclear Power Group. Dingbo Generator has been cooperating with Shangchai Power for many years. In 2009, it became the OEM partner of Shangchai Power in China. Dingbo generator VOLVO unit ranks the top three in the Asia-Pacific sales volume, and is the core OEM partner of Sweden Volvo in the Asia-Pacific region. If any question please feel free to visit our website https://www.dieselgeneratortech.com/ or send email to sales@dieselgeneratortech.com.