| 引用本文: | 黄海宏,郑小朋,王海欣.三相四线制有源电力滤波器均压环优化设计[J].电力自动化设备,2020,40(7): |
| HUANG Haihong,ZHENG Xiaopeng,WANG Haixin.Optimal design of voltage-balance loop for three-phase four-wire APF[J].Electric Power Automation Equipment,2020,40(7): |
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| 摘要: |
| 在三相四线制电容分裂式有源电力滤波器应用中，受限于硬件参数以及控制策略的影响，电容中点电位易发生偏移，使得上、下电容电压失衡，严重影响系统运行的安全性以及有源电力滤波器的补偿性能。为改善传统均压环设计的不足，基于Butterworth二阶陷波器对均压环输出值进行陷波，通过输出反馈提高系统动态响应能力的方式对传统均压环设计进行改进，从而降低传统均压环输出电压脉动对滤波器补偿性能的影响，并在保证直流侧电容电压稳态精度的同时加快均压响应速度。在MATLAB仿真中验证了改进型均压环设计的有效性，并搭建以DSP为控制芯片的实验平台验证了改进型均压环设计的可行性。 |
| 关键词: 有源电力滤波器 陷波器 均压环 输出反馈 动态响应 |
| DOI：10.16081/j.epae.202007021 |
| 分类号:TN713 |
| 基金项目: |
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| Optimal design of voltage-balance loop for three-phase four-wire APF |
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HUANG Haihong, ZHENG Xiaopeng, WANG Haixin
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School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China
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| Abstract: |
| In the application of three-phase four-wire capacitor split APF(Active Power Filter),due to the influence of actual hardware parameters and control strategy, the neutral point potential of capacitor fluc-tuates and the capacitor voltage is not balanced, which seriously affects the security of system operation and the compensation performance of APF. To improve the shortcomings of traditional voltage-balance loop design, the Butterworth second-order notch filter is used to notch the output value of voltage-balance loop, and the output feedback is used to effectively improve the response ability of voltage equalizing. The influence of the output voltage ripple of traditional voltage-balance loop on the compensation performance of APF is reduced, and the response speed of the voltage-balance loop is accelerated while the steady-state accuracy of the DC side capacitor voltage is guaranteed. The validity of the improved voltage-balance loop design is verified by MATLAB simulation, the experimental platform based on the DSP chip is built to verify the feasibility of the improved voltage-balance loop design. |
| Key words: active power filter notch filter voltage-balance loop output feedback dynamic response |
