电源学报
電源學報
전원학보
JOURNAL OF POWER SUPPLY
2012年
6期
23-26
,共4页
孙少雄%刘洋%殷福亮%陈喆
孫少雄%劉洋%慇福亮%陳喆
손소웅%류양%은복량%진철
自感知执行器%调谐滤波器%自相关法%递推最小二乘%最小均方
自感知執行器%調諧濾波器%自相關法%遞推最小二乘%最小均方
자감지집행기%조해려파기%자상관법%체추최소이승%최소균방
self-sensing actuator%tuned filters%autocorrelation function%RLS%LMS
根据自感知执行器的工作原理,利用一只变压器完成谐波检测和抑制两种功能,处于正常工作状态时可实现谐波抑制,处于非正常工作状态时不致放大谐波。首先对工频信号进行数字采样,再利用自相关函数法结合递推最小二乘估计工频信号的频率,再根据该频率产生反向抑制谐波,来抑制当前谐波。为实时调整各次反向抑制谐波的权重,根据当前时刻的谐波抑制的结果,采取最小均方自适应算法来更新权重。模拟试验表明,该调谐滤波器具有良好的控制特性。
根據自感知執行器的工作原理,利用一隻變壓器完成諧波檢測和抑製兩種功能,處于正常工作狀態時可實現諧波抑製,處于非正常工作狀態時不緻放大諧波。首先對工頻信號進行數字採樣,再利用自相關函數法結閤遞推最小二乘估計工頻信號的頻率,再根據該頻率產生反嚮抑製諧波,來抑製噹前諧波。為實時調整各次反嚮抑製諧波的權重,根據噹前時刻的諧波抑製的結果,採取最小均方自適應算法來更新權重。模擬試驗錶明,該調諧濾波器具有良好的控製特性。
근거자감지집행기적공작원리,이용일지변압기완성해파검측화억제량충공능,처우정상공작상태시가실현해파억제,처우비정상공작상태시불치방대해파。수선대공빈신호진행수자채양,재이용자상관함수법결합체추최소이승고계공빈신호적빈솔,재근거해빈솔산생반향억제해파,래억제당전해파。위실시조정각차반향억제해파적권중,근거당전시각적해파억제적결과,채취최소균방자괄응산법래경신권중。모의시험표명,해조해려파기구유량호적공제특성。
According to the principle of self-sensing actuators, a novel method measuring and suppressing harmonics was proposed. This approach could not only guarantee the performance in suppressing harmonics at normal operation state, but also ensure not to amplify harmonics in case of malfunctioning. Firstly, harmonic power signal was sampled, and then its frequency was estimated with autocorrelation function method and further improved with RLS algorithm. Based on the estimated value of frequency, an inverted suppression harmonic signal is generated to offset original harmonic. To update the weights of each harmonic offset signal in real-time, with the knowledge of last moment offset error, an adaptive algorithm LMS is employed. The experimental results show that the proposed filter has good command of control.