基于LCL型有源电力滤波器的复合电流控制策略研究

发布时间：2019-05-06 06:31

【摘要】：针对传统电流控制策略存在高稳态精度与快速动态响应的矛盾,提出了一种基于LCL型有源电力滤波器的复合电流控制策略。该控制策略将比例积分控制和重复控制有机结合,在保证动态响应的基础上,利用PI控制器将控制模型补偿为稳定系统,使其在低频段具有良好的控制特性;利用重复控制器校正LCL型滤波器谐振峰和内环的固有相位滞后,实现电网谐波电流的快速跟踪与高精度补偿。实验结果表明,经过并联有源电力滤波器的谐波补偿,电网电流的总谐波失真明显减小,负载变化时并联有源电力滤波器可实现单周期快速响应,验证了所提出的复合电流控制策略的有效性。
[Abstract]:Aiming at the contradiction between high steady-state precision and fast dynamic response of traditional current control strategy, a hybrid current control strategy based on LCL active power filter is proposed. The control strategy combines proportional integral control and repetitive control organically. On the basis of ensuring dynamic response, the control model is compensated into a stable system by using PI controller, so that the control model has good control characteristics in low frequency band. The repetitive controller is used to correct the inherent phase lag of the resonant peak and inner loop of LCL filter, so as to realize the fast tracking and high precision compensation of the harmonic current in the power network. The experimental results show that after harmonic compensation of shunt active power filter, the total harmonic distortion of power network current is obviously reduced, and the parallel active power filter can realize single-period fast response when the load changes. The effectiveness of the proposed hybrid current control strategy is verified.
【作者单位】：太原理工大学煤矿电气设备与智能控制山西省重点实验室;太原科技大学电子信息工程学院;
【基金】：国家自然科学基金资助项目(5157712) 山西省重点实验室开放课题(MEI-201501,MEI-201602)
【分类号】：TD611

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