关键词: 自动励磁调节器, 辅助限制环节, 实时数字仿真系统, 电力系统稳定

Abstract: The automatic voltage regulator (AVR) plays an important role in maintaining generator terminal voltages and ensuring the power system stability. However, the auxiliary limiting characteristics of digital AVRs made by various manufactures are quite different, which has affected the safety of generator apparatus and stability of power grids, but enough attention has not been paid to for a long time. Based on the performance testing of AVRs and generator running power diagram, the differences in auxiliary limiting characteristics of various AVRs were analyzed and their possible impact on the safety of generator apparatus and stability of power grids were determined. Some proposals were put forward for testing analysis of the auxiliary limiting technical indicators of AVRs according to statistical data from experimental tests. The results can be used as a reference for strengthening management of the excitation system.

Key words: automatic voltage regulator (AVR), auxiliary limiter, real time numerical simulation, power system stability