The low residual voltage fast excitation technology of ABB excitation system is mainly achieved through the following steps:

Pre charging process: Before starting the generator set, the excitation system will first perform a pre charging process. At this point, the thyristor rectifier bridge charges at a lower voltage and current, gradually increasing the voltage of the capacitor.

Fast excitation: Once the generator set needs to quickly establish voltage, the excitation system will immediately switch to fast excitation mode. At this point, the thyristor rectifier bridge will rapidly increase the output voltage and current, causing the excitation current of the generator set to rapidly increase, thereby quickly establishing voltage.

Residual voltage control: During the rapid excitation process, the ABB excitation system precisely controls the output of the thyristor rectifier bridge to maintain the residual voltage of the generator set at a lower level. This can reduce the impact of the generator set on the power grid during the startup process and improve the stability of the system.

Dynamic adjustment: During the operation of the generator set, the ABB excitation system will monitor the operating status of the generator set in real time and make dynamic adjustments as needed. For example, when the load of the generator set changes, the excitation system will adjust the excitation current accordingly to maintain the stable operation of the generator set.

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