Guidelines for further strengthening generator protection and usage throughout the entire lifecycle of
diesel generator sets are provided to guide users in proper and reasonable use, ultimately improving diesel generator performance. When a generator load or ground fault risk is detected, self-protection is activated immediately, and technical parameters are transmitted to management via sensors.
1. Longitudinal differential protection: This protects against interphase short circuits in the stator winding and its lead wires.
2. Transverse differential protection: This protects against interturn short circuits in a single phase of the stator winding. This protection is only applicable when a single-phase stator winding has two or more parallel branches, forming two or three neutral point output terminals.
3. Single-phase ground fault protection: This protects against single-phase ground faults in the generator stator winding.
4. Excitation circuit ground fault protection: This protects against ground faults in the excitation circuit.
5. Overload protection: This signal protects when the generator exceeds its rated load for an extended period. Small and medium-sized generators only need to install stator overload protection; large generators should have both stator overload protection and excitation winding overload protection. 6. Stator Winding Overcurrent Protection: When a short circuit occurs outside the generator's longitudinal protection range, short-circuit protection components or circuit breakers will not be able to effectively handle external short circuits. Therefore, this protection also serves as a backup measure for longitudinal protection.
7. Stator Winding Overvoltage Protection: This protection prevents the stator winding from disconnecting all loads due to transient overvoltage. Hydroelectric generators and large steam turbine generators are equipped with overvoltage protection, while small and medium-sized steam turbine generators generally do not.
8. Out-of-step Protection: This protection reflects out-of-step conditions in large generators and system oscillations.
When purchasing a diesel generator set, pay close attention to its overall performance, fuel consumption, fuel consumption, and after-sales maintenance services. Bigger is better. Many people believe that the bigger the price of a diesel generator, the better. Therefore, when choosing a diesel generator, they focus solely on the price of the unit, without considering other factors. This is the belief that everything expensive must be good, not bad. In today's market, very expensive items are not considered good.
