基于頻率自適應(yīng)諧振控制器的靜止無功發(fā)生器電流控制
[Abstract]:In order to improve the compensation performance of static Var generator (SVG), enhance the ability of harmonic suppression and broaden the compensation bandwidth, a current control strategy based on resonant controller (RC) is proposed. By setting the corresponding RC, for the fundamental reactive power and the specific subharmonic respectively, the infinite open-loop gain of the controller at the resonant frequency point is used to realize the static tracking of the fundamental and harmonic currents. The control function is realized by the digital signal processing chip (DSP). In order to avoid the performance deviation of the controller introduced by the digital process, the controller is designed directly in the discrete domain, and the open-loop gain of RC is sensitive to the frequency of the power grid. The fixed fundamental period sampling points are used to adjust the sampling period of the digital phase-locked loop in real time to ensure that the resonant frequency of the controller tracks the frequency change of the power grid in real time and improves the robustness of the device. The experimental results verify the effectiveness of the proposed control strategy.
【作者單位】: 浙江大學(xué)電氣工程學(xué)院;
【基金】:國家自然科學(xué)基金(51177147) 浙江省重點科技創(chuàng)新團(tuán)隊項目(2010R50021)資助項目
【分類號】:TM761.12
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