Abstract：The excitation rectification device directly affects the reliable operation of the generator and its excitation system. The output current balance of the branches of the rectification device is an important operation index of the excitation rectification device, which is related to its operational efficiency and safety margin. Large generator rectification device has many branches, and the factors affecting the current sharing coefficient are more complicated. This article starts from the physical meaning of the current sharing coefficient, then introduces several traditional current sharing technologies commonly used and their shortcomings, and next proposes a dynamic current sharing technology applied for large generator excitation systems, which can monitor the output current of each rectifier branch in real time when the generator is running, and can automatically adjust accordingly to ensure that the current sharing coefficient meets the excitation standard requirements during the long-term stable operation of the generator, and improve the current redundancy performance of the rectifier system as well as the safety and stability margins. Finally, engineering application examples are given before summarizing the conclusions.
2021, Vol. 22 
