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Development of Optimal Control for Distribution Line Active Filter with LC Power Filter

LC电力滤波器配电线路有源滤波器优化控制的研制

基本信息

批准号：
11650288
负责人：
IZUMI Katsuhiro
金额：
$ 2.3万
依托单位：
Nagasaki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650288/
关键词：
Active Filter LC Filter DSP Digital PLL IGBT Inverter

项目摘要

Control techniques for LC filter, active filter and active filter with LC filter were developed and verified by the experiment. The inductance of the ferrite core was used in the LC filter. By using only LC filter, it was confirmed to have to adjust LC accurately according to the system impedance.The optimal servo and PI controller were used for an active filter. In this system, digital IIR Butterworth HPF was used to obtain the compensation current. The compensation characteristic corresponding to this cut-off frequency was examined. Total harmonic distortion factor was minimized at the cut-off frequency about 20Hz and THD was small without HPF.LC filter and an active filter were connected in parallel. Capacitors of the filter were changed and THD was measured. THD minimum point became flat compared with the case of only LC filter. It was confirmed that the compensation characteristic was maintained even if the L and C were changed. From the current waveform of an active filter, the inverter output was decreased.Therefore, the control method of the active filter system with LC filter was obtained.

提出了LC滤波器、有源滤波器和有源滤波器加LC滤波器的控制技术，并进行了实验验证。铁氧体磁芯的电感用于LC滤波器。在仅使用LC滤波器的情况下，确定了必须根据系统阻抗精确调节LC，并将最优伺服和PI控制器用于有源滤波器。该系统采用数字IIR巴特沃思高通滤波器来获得补偿电流。对应于此截止频率的补偿特性进行了检查。采用LC滤波器与有源滤波器并联的结构，使系统的总谐波畸变率在截止频率20Hz左右达到最小，总谐波畸变率小。改变滤波器的电容器并测量THD。与只使用LC滤波器的情况相比，THD最小点变得平坦。确认了即使L和C改变，补偿特性也被保持。从有源滤波器的电流波形出发，分析了逆变器输出功率下降的原因，从而得出了采用LC滤波器的有源滤波系统的控制方法。