【摘要】 在有源滤波器设计中,谐波电流的实时检测与分离是其中的关键环节。文中分析了基于瞬时无功理论的ip、iq法检测谐波电流的基本原理与实现方法。ipi、q法与DFT谐波电流检测方法相比,实时性能更好,容易实现,而且不受电网电压波形畸变的影响。仿真和实验表明,采用ipi、q法能够实时、准确地检测出非线性负载的谐波电流和无功电流。更多还原

【Abstract】 Harmonic current detecting promptly is very important in the design of APF.Based on the theory of instantaneous reactive power,this paper analyses the fundamental and implementation of the i_p、i_q method.Comparing the DFT method,the i_p、i_q method is more prompt.The effectiveness of the model of discharging current is verified by simulation.Experimental results demonstrate that the discharging device based on three-phase PWM VSC can both discharge battery at a highly precise current,and can transfer the energy of battery into the public utility with low THD current and unity power factor.更多还原