Abstract: this paper presents a new method of frequency and phase angle measurement based on digital signal processor(DSP). Compared with singlechip, PLC or FPGA measurement devices and others, measurement device based on this method is of high precision and reliability and the hardware circuit is greatly simplified, so that the precision and reliability of excitation control are greatly raised.

Key words: Frequency and phase angle measurement, Digital signal processor, Event manager, Excitation control

摘要： 提出了一种基于数字信号处理器（DSP）的测频测相方法，用于同步发电机微机励磁系统中机组频率及机端电压电流相位差的测量，与传统的单片机、PLC或FPGA测频测相装置相比，其硬件电路大为简化，测频测相装置的可靠性极大提高，而且测频测相精度较高，提高了发电机励磁控制的可靠性和控制精度。

关键词: 频率相位测量, 数字信号处理器, 事件管理器, 励磁控制