Technical Requirements and Faults for Generator Synchronization

During the generator synchronization process, you need to ensure that the four parameters are aligned between the generators. The synchronization requirements for generators include:

Phase sequence: The three-phase of the AC generator in the system must have the same phase sequence as the grid or bus.

Voltage amplitude: If the AC generator and busbar are not parallel, the voltage amplitude will cause serious interruption. When the voltage of the AC generator is higher than the bus voltage, you will generate high reactive power in the grid, which may pose safety issues. If the voltage of the AC generator is low, the generator will absorb high reactive power from the busbar and may malfunction.

Frequency: When frequencies are not equal, they generate unstable energy flows. This instability may lead to equipment damage.

Phase angle: The phase angle between the busbar and the generator AC generator must be zero.

The generator synchronization program will help you determine whether these parameters between the busbar and the generator AC generator are equal.

Generator synchronization technology:

Generator synchronization may be a difficult concept to understand, but here are three basic techniques for generator synchronization:

Three dim light method - using a busbar to synchronize the second generator; Unable to provide information on generator and bus frequency.

Two bright and one dark methods - measure frequency, but cannot check the correctness of phase sequence.

Synchronous Oscilloscope Method - Indicates whether the frequency of the AC generator is higher or lower than the bus frequency

Modern synchronous equipment automates the entire synchronization process to avoid manual lighting and synchronous observation. These methods are much more reliable.

Generator synchronization fault

If the synchronization between the generator and the power system is incorrect or performed improperly, it is possible to:

The damage to the generator and prime mover caused by mechanical stress caused by rapid acceleration/deceleration requires synchronizing the rotating mass.

High current causes damage to the windows of the generator and step-up transformer

Interference to the power system, such as non nominal oscillations and voltage deviations

When the protection relay determines that the generator is operating under abnormal operating conditions, it prevents the generator from remaining online and losing load, which may cause the generator to shut down

Due to all possible risks of synchronization errors, taking appropriate measures during this process is crucial for all operations.

Founded in 1974, Dingbo Power Generation Equipment Co., Ltd. is a professional manufacturer of diesel engines, generators and generator sets, and one of the earliest manufacturers of diesel engines, generators and generator sets in China. Since 1992, the company has been a qualified generator set manufacturer inspected by the National Internal Combustion Engine Generator Set Quality Supervision and Inspection Center. Over the years, the company has carried out extensive cooperation with Shanghai Diesel, Weichai, Sweden Volvo, Sino US joint venture Chongqing Cummins, American Qianglu and other companies, and has become a (OEM) supporting factory and technical center. It has 64 sales service departments nationwide, providing users with design, supply, commissioning and maintenance services at any time. Dingbo quality is worth depending on. If you want get more information, please feel free to send email to sales@dieselgeneratortech.com we will pay highly attention on your question.