中文摘要：

为了使电网电压尽可能接近正弦波形,提出了一种通过校正网侧电压波形来减小电网中的谐波电流的智能控制有源滤波技术。智能芯片检测电网电压波形,再与标准正弦电压波形比较求得误差电压,该误差电压中含有电网中谐波电流的波形信息。用这个误差电压形成PWM整流器的指示电流,有源滤波器在智能芯片的控制下从电网吸收谐波电流并向电网输出基波电流,完成电网有源滤波。智能控制有源滤波器中以标准三相电压信号为基准,在进行有源滤波的同时还能调整三相电网的平衡关系。设计制作了实验电路和实验装置,完成了软件编程和电路调试。测试结果表明,智能控制有源滤波器能够从电网中吸收谐波电流,使电网中的电压波形得到矫正。

英文摘要：

In order to construct the grid voltage waveform closer to sinusoidal,a technology of smart controlled active power filter was introduced to reduce the harmonic currents in power grid and to compensate grid voltage waveforms.Voltage waveform in power system was measured by microcontroller and compared with the standard sinusoidal voltage waveform;the error signal was obtained as well as the information of harmonic current waveform was identified.The error voltage was employed to form the referenced current of PWM rectifier;harmonic currents were absorbed from power grid and a sinusoidal current was yielded into it under the control of microcontroller in active power filter to get rid of the harmonic currents in power system.Taking a standard three-phase voltage signal as reference,the active power filter can adjust and balance between three-phase power grids.Experimental circuit and test system were designed along with the software programming and debugging was accomplished.Test results show that smart controlled active power filter can absorb harmonic current from power grid and modify the distorted voltage waveform.