三电平APF谐波电流及中点电位平衡控制

第18卷第5期2020年9月

怎么自制纳米胶带Vol.18No.5

Sept.2020电源学报

Journal of Power Supply

捕蟹笼DOI：10.13234/j.issn.2095-2805.2020.5.180中图分类号:TM71文献标志码:A 三电平APF谐波电流及中点电位平衡控制

胡梦宇，沈艳霞

(江南大学物联网技术应用教育部工程研究中心，无锡214122)

摘要：针对三电平有源电力滤波器，提出一种基于带柔化输入的模型预测控制方法用于谐波补偿。同时，为避免直流侧中点电位的波动和偏移问题给系统稳定性带来的不利影响，采用基于平衡因子和简化SVPWM算法的中点电位平衡控制策略。模型预测控制方法根据实际有源电力滤波器控制系统设计电流预测模型，同时将预测输出与实际输出的偏差及时反馈，结合滚动优化，使有源电力滤波器的补偿电流快速跟踪参考值。直流侧母线电压控制采用简化三电平SVPWM算法，简化了算法的同时保证了中点电

位平衡。建立了APF预测电流控制的等效模型，并进行了仿真验证。所提方法有效柔化电流输入从而减小超调，较传统预测控制方法更为稳定，减少了谐波含量，改善了补偿精度，保证了直流母线电压的稳定和中点电位快速平衡。仿真结果验证了所提控制策略的有效性与可行性。

关键词：柔化输入；模型预测控制(MPC)；三电平；有源电力滤波器(APF)；空间矢量脉宽调制(SVPWM)；中点电位平衡控制

Control of Harmonic Current and Neutral-point Potential

Balance for Three-level APF

HU Mengyu,SHEN Yanxia

双模具

(Engineering Research Center of Internet of Things Technology Applications of Ministry of Education,

双面针织机Jiangnan University,Wuxi214122,China)

虹膜识别设备折叠耳机Abstract:For a three-level active power filter(APF),a model predictive control(MPC)method with softened input is proposed for harmonic compensation.At the same time,a neutral-point potential balance control strategy based on the balance factor and simplified space vector pulse width modula

tion(SVPWM)algorithm is adopted to avoid the adverse effects of the fluctuation and migration of DC-side neutral point potential on the system stability.The MPC method is used to design a current prediction model based on the actual APF control system.Meanwhile,the deviation of the predicted output from the actual output is fed back in time so that the compensation current of the APF can quickly track the reference value by combing the rolling optimization.The control of DC-side bus voltage adopts a simplified three-level SVPWM algorithm, thus simplifying the algorithm and ensuring the neutral point potential balance.An equivalent model of APF predictive current control is established,which is verified through simulations.The proposed method effectively softens the current input and thus suppress the overshoot,which is more stable than the traditional predictive control method.It reduces the harmonic content,improves the compensation accuracy,and ensures the stability of DC bus voltage and the fast balance of neutral point potential.Simulation results verify the effectiveness and feasibility of the proposed control strategy.

Keywords:softened input；model predictive control(MPC);three-level;active power filter(APF);space vector pulse width modulation(SVPWM);neutral point potential balance control

电力电子装置在电力系统与电力输送、电源与电力变换等等方面发挥着巨大的作用，但其广泛应用也给电网带来了严重的谐波污染叫谐波治理问

收稿日期：2018-07-23；录用日期：2018-10-15题受到了广泛关注。有源电力滤波器APF(active power filter)具有滤波特性好、装置体积小且应用场合和对象灵活等优点，已成为电能质量谐波治理的研究热点和发展方向。由于信息化和数字化技术的发展，目前APF系统多采用数字控制，其固有的延

本文发布于:2024-09-25 13:20:27，感谢您对本站的认可！

本文链接：https://www.17tex.com/tex/3/121886.html

上一篇：大功率飞轮储能技术在镁冶炼厂对电网冲击负荷解决方案

下一篇：大量使用变频器的危害

标签：电力控制预测谐波电流模型

留言与评论（共有 0 条评论）