Performance analysis of frequency-domain block LMS adaptive digital filters

1989 ◽  
Vol 36 (2) ◽  
pp. 173-189 ◽  
Author(s):  
Jae Chon Lee ◽  
Chong Kwan Un
Keyword(s):  
Performance Analysis ◽  
Frequency Domain ◽  
Digital Filters ◽  
Adaptive Digital Filters ◽  
Domain Block

scholarly journals A phase-locked loop using ESO-based loop filter for grid-connected converter: performance analysis

2021 ◽  
Author(s):  
Baoling Guo ◽  
Seddik Bacha ◽  
Mazen Alamir ◽  
Julien Pouget
Keyword(s):  
Performance Analysis ◽  
Frequency Domain ◽  
Low Frequency ◽  
Experimental Tests ◽  
Frequency Measurement ◽  
Phase Locked Loop ◽  
Frequency Domain Analysis ◽  
Loop Filter ◽  
Control Stability ◽  
Unbalanced Grid

AbstractAn extended state observer (ESO)-based loop filter is designed for the phase-locked loop (PLL) involved in a disturbed grid-connected converter (GcC). This ESO-based design enhances the performances and robustness of the PLL, and, therefore, improves control performances of the disturbed GcCs. Besides, the ESO-based LF can be applied to PLLs with extra filters for abnormal grid conditions. The unbalanced grid is particularly taken into account for the performance analysis. A tuning approach based on the well-designed PI controller is discussed, which results in a fair comparison with conventional PI-type PLLs. The frequency domain properties are quantitatively analysed with respect to the control stability and the noises rejection. The frequency domain analysis and simulation results suggest that the performances of the generated ESO-based controllers are comparable to those of the PI control at low frequency, while have better ability to attenuate high-frequency measurement noises. The phase margin decreases slightly, but remains acceptable. Finally, experimental tests are conducted with a hybrid power hardware-in-the-loop benchmark, in which balanced/unbalanced cases are both explored. The obtained results prove the effectiveness of ESO-based PLLs when applied to the disturbed GcC.

Analysis of the partitioned frequency-domain block LMS (PFBLMS) algorithm

2001 ◽  
Vol 49 (9) ◽  
pp. 1860-1874 ◽  
Author(s):  
Kheong Sann Chan ◽  
B. Farhang-Boroujeny
Keyword(s):  
Frequency Domain ◽  
Domain Block
Sign in / Sign up

Export Citation Format

Share Document