| As the development of society, high-quality power becomes more and moreimportant. However, harmonic interference becomes more and more serious, as a resultof many non-linear loads. Harmonic Suppression becomes an important field in thepower system research. Recently, the common way of harmonic supression is to installpassive filter to power system parallel. passive filter is easy to design, but its filterperformance depends on the system impedance characteristics, and it is easily affectedby the network's harmonic pollution degree, temperature excursion, filter capacitanceaging and the influence of the non-linear load's changing. these problem influence thepassive filter's performance heavily.The double-tuned filter has two resonance frequencies and filter two harmonics.ithas the same function as two single-tuned filters in parallel. double-tuned filter iswidely used. but it also has the problem,such as capacitance aging.So as to solve theproblem, in this paper, a double-tuned filter based on double-controlled reactor isresearched and designed,its aim is to filter 5th and 7th harmonics. this fiter conquersthe traditional filter's deficiency, it is capable of tracking harmonic frequencies bycontinuely tuning the reactor, keeping the filter working around resonance point.thisdesign bases on the TMS320F2812 to realize the continuous tune of the controllablereactor, using the combination of the hanning-windowed DFT and the interpolationCorrection method. |
