基于可控电抗器的单调谐滤波器  

Single tuned filter based on controllable reactor

作　　者：于明涛[1] 陈建业[1] 王赞基[1] 

机构地区：[1]清华大学电机工程与应用电子技术系,北京100084

出　　处：《电力自动化设备》2007年第1期39-41,共3页Electric Power Automation Equipment

摘　　要：介绍了一种基于可控电抗器的单调谐滤波器,通过将普通的无源滤波器进行有源化的改造,改善传统无源滤波器易受参数影响而失谐的缺点,实现当系统其他参数变化时,可以通过调节电感值使滤波器在原来的频率处保持谐振状态,从而保持较好的滤波效果。对检测滤波支路n次谐波电压、电流同相位法和滤波后系统侧n次谐波电流幅值最小法2种闭环控制策略的可行性和特点进行了分析,并利用基于自寻最优的控制方法进行了7次单调谐滤波器的实验,结果证明了基于可控电抗器的单调谐滤波器具有良好的滤波效果和对系统参数变化的自调谐功能。A kind of single tuned filter based on controllable reactor is introduced,which is reformed from passive into active to avoid the influence of parameter change on resonance frequency. When system parameters change,the filter keeps resonance condition at original frequency by adjusting inductance and remains better filtering performance. Features of two Closed-loop control methods and their applicability are analyzed：the n- th harmonic voltage and current in- phase check method for filter branch and the minimal n- th harmonic current method for system side. Experiments on 7 th harmonic filter using optimal control validate the good ristics. filtering performance and self-tuning characteristics.

关 键 词：可控电抗器 单调谐滤波器 自调谐 

分 类 号：TM47[电气工程—电器]