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一、前言对同步发电机励磁系统的基本要求是: 1.在正常运行情况下,供给发电机励磁电流。随着发电机负荷大小和性质的改变,快速调节励磁电流,保证发电机稳定运行并维持发电机端电压或电力系统某点电压为一给定值; 2.系统故障时有良好的动态特性。即要求励磁系统具有最小的励磁时间常数、高的顶值电压倍数和足够长的强励时间,以保证系统的暂态稳定。故障切除后,系统电压能迅速恢复正常;
I. Preface The basic requirements of the synchronous generator excitation system are as follows: 1. In normal operation, the generator excitation current is supplied. With the generator load size and nature of the change, quickly adjust the excitation current to ensure the stable operation of the generator and maintain the generator terminal voltage or power system voltage at a given point; 2. System failure has good dynamic characteristics. That is required excitation system has the minimum excitation time constant, high voltage multiples and long enough strong excitation time to ensure the system transient stability. After fault removal, the system voltage can quickly return to normal;