【摘要】 针对现有单相谐波电流检测方法存在算法复杂及延时的缺点,提出了一种改进型单相谐波及无功电流的检测方法,该方法检测电路简单,成本低,便于硬件实现;算法简单,可靠性高,无延时;当只需检测谐波电流时,可以省去锁相环;适当选择低通滤波器的参数,可以使谐波电流的检测既有较高的精度,又有较快的动态响应特性。仿真结果证明了该方法的有效性。更多还原

【Abstract】 The detecting method for harmonics current in single -phase circuit have these problems of complication in the method and delay in the time,so an improved detecting method for harmo nics and reactive currents in single -phase circuit is proposed.The method have some advantage,for exam ple,its de-tecting circuit ease,low cost and it can be realized easily.In the while,the method solv ed the problem of real -time harmonics.The Phase Lock Loop(PLL)in the method can be omited when detecting harmonics current only.A better tradeoff betw een the harmonics current detecting precision and dyn amic response of the instantaneous dectecting method ca n be achieved by carefully choosing the parameter of the low -pass fil-ter.The simulation make it evident t hat the method is feasible.更多还原