摘要
电网频率波动时,系统采样频率与电网频率的比值可能为分数。重复控制(RC)的谐振频率将偏离实际电网频率,系统的谐波抑制能力将大大降低。针对该问题,提出了基于有限脉冲响应(FIR)滤波器的频率自适应复合重复控制方案。该方法通过在线调整FIR滤波器的系数实现分数延迟,使RC的谐振频率近似于电网频率,从而实现系统对电网频率变化的适应。最后,仿真和实验验证了所提控制策略的有效性。
When the grid frequency varies,the ratio of system sampling frequency to grid frequency may be a fraction.The resonant frequencies of Repetitive Control(RC)will deviate from real grid frequencies,and the harmonic suppression capability of system will be significantly reduced.Therefore,a Frequency Adaptive PIRC(FA-PIRC)scheme based on FIR filter is proposed.The fractional delay is realized by adjusting the coefficients of FIR filter online,that the resonant frequency of RC is approximated to grid frequency,thus realizing the adaptation of system to grid frequency variation.Finally,simulation and experiments verify the effectiveness of the proposed control strategy.
作者
李伟锋
陆小辉
陈赛男
王双红
马华国
LI Weifeng;LU Xiaohui;CHEN Sainan;WANG Shuanghong;MA Huaguo(School of Electronic and Information,Zhongyuan University of Technology,Zhengzhou 451191,China)
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2020年第6期10-17,共8页
Power System Protection and Control
基金
国家自然科学基金项目资助(61673404)
河南省重点科技攻关项目资助(152102210155)。
