Abstract
In order to eliminate the characteristic harmonics in high voltage direct current (HVDC) transmission systems and to simplify the analog controller structure, this paper proposes a new digital controller by adopting an approximate inverse system control strategy according to the frequency response characteristic of the hybrid power filter. The proposed digital controller is implemented with a TMS320C32 DSP, including a series of parallel digital band-pass filters, phase shifters and amplifiers. The results of both simulations based on PSCAD and experiments on a 30 kVA HVDC system prove that the proposed digital control system is stable and efficient for eliminating the harmonics.
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Translated from Journal of Tsinghua University (Natural Science Edition), 2005, 45(10): 1305–1308 (in Chinese) by HUANG Zhen-hua
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Su, L., Zhao, Dy., Chen, Jy. et al. Digital controller for hybrid filter in HVDC based on approximate inverse system. Front. Electr. Electron. Eng. China 1, 367–370 (2006). https://doi.org/10.1007/s11460-006-0070-8
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DOI: https://doi.org/10.1007/s11460-006-0070-8