基于时序区间的三相电源相序检测方法的研究

Research on Phase Sequence Detection Method of Three-phase Power Supply Based on Time Sequence Interval

以交流三相平衡电压的基本原理为基础,通过硬件电路实现了交流正弦信号到同步方波信号的转换,并以三相方波信号为基础将一个交流周期划分为6个不同的时序区间,通过对不同区间内三相电压方波信号的研究,找到其不同相序、不同区间内方波信号的变化规律,从而解决了三相电压相序的判断问题。测试结果表明,基于时序区间的相序检测方法与纯硬件结构的三相相序检测方法相比,具有硬件结构简单、检测快速、可靠、稳定的特点。

Based on the basic principle of AC three-phase balanced voltage, the conversion from AC sinusoidal signal to synchronous square wave signal was realized by hardware circuit, and an AC cycle was divided into six different time sequence intervals based on three-phase square wave signal.Through the research of three-phase voltage square wave signal in different intervals, the change rule of square wave signal in different phase sequence and different intervals was found, thus, the problem of judging the phase sequence of three-phase voltage was solved. The test results show that the phase sequence detection method based on time sequence interval has the characteristics of simple hardware structure, fast detection, reliability and stability compared with the three-phase phase sequence detection method based on pure hardware structure.