基于频率自适应谐振控制器的静止无功发生器电流控制
发布时间：2019-05-09 16:37
【摘要】：为了提高静止无功发生器(SVG)的补偿性能、增强谐波抑制能力、拓宽补偿带宽,提出一种基于谐振控制器(RC)的电流控制策略。通过对基波无功和特定次谐波分别设置对应的RC,利用控制器在谐振频率点的无穷大开环增益,实现基波和谐波电流的无静差跟踪。通过数字信号处理芯片(DSP)实现控制功能,为了避免数字化过程引入的控制器性能偏差,直接在离散域进行控制器设计,并针对RC开环增益对电网频率敏感的特性,利用固定基波周期采样点数,实时调节采样周期的数字锁相环,保证控制器谐振频率实时跟踪电网频率变化,提高装置鲁棒性。实验结果验证了本文提出控制策略的有效性。
[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.
【作者单位】： 浙江大学电气工程学院;
【基金】：国家自然科学基金(51177147) 浙江省重点科技创新团队项目(2010R50021)资助项目
【分类号】：TM761.12
[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.
【作者单位】： 浙江大学电气工程学院;
【基金】：国家自然科学基金(51177147) 浙江省重点科技创新团队项目(2010R50021)资助项目
【分类号】：TM761.12
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