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郑征,田世克,张国澎.指定次谐波补偿并联型有源滤波器电流重构限流策略[J].电源学报,2018,16(5):59-66
指定次谐波补偿并联型有源滤波器电流重构限流策略
Current-limiting Strategy for Current Reconstruction of Shunt Active Power Filter with Specified Sub-harmonic Compensation
投稿时间:2016-08-24  修订日期:2018-02-13
DOI:10.13234/j.issn.2095-2805.2018.5.59
中文关键词:  并联型有源滤波器  指定次谐波  电流重构  限流  滑窗迭代FFT
英文关键词:shunt active power filter (SAPF)  specified sub-harmonic  current reconstruction  current-limiting  slid-ing window iterative FFT
基金项目:河南省高等学校重点科研资助项目(13150045);河南省教育厅基础研究计划资助项目(15A470013)
作者单位E-mail
郑征 河南理工大学电气工程与自动化学院, 焦作 454000  
田世克 河南理工大学电气工程与自动化学院, 焦作 454000 956360677@qq.com 
张国澎 河南理工大学电气工程与自动化学院, 焦作 454000  
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中文摘要:
      针对有源滤波器指定次谐波补偿时负载谐波电流突增导致有源滤波器过流的现象,在并联型有源滤波器传统比例限流的基础上,提出了一种谐波电流重构的限流策略。本策略首先利用滑窗迭代FFT的方法,求出指定次谐波电流的幅值与相位,然后通过指定次谐波电流的叠加重构出被补偿的谐波电流,重构电流与比例系数之积作为新的参考电流参与并联型有源滤波器的控制。此方法可充分利用并联型有源滤波器的补偿能力,实现并联型有源滤波器的准确限流,并能使并联型有源滤波器在超出其补偿容量的系统中安全运行。仿真和试验结果验证了本方法的正确性与有效性。
英文摘要:
      When the specified sub-harmonic compensation of active power filter(APF) is performed, the load harm-onic current jump will result in over-current of APF. In this paper, a current-limiting strategy for the reconstruction of harmonic current is proposed based on the traditional proportional current-limiting of shunt active power filter(SAPF). First, the amplitude and phase of the specified sub-harmonic current are obtained using the sliding window iterative FFT analysis under this strategy. Then, the compensated harmonic current is reconstructed by the superposition of the specified sub-harmonic current, and the product of the reconstructed current and the proportional coefficient is used as a new reference current for the control of SAPF. This method can make full use of the compensation capability of SAPF, thus realizing the accurate current-limiting of SAPF and ensuring its safe operation beyond the compensation capacity of the system. Simulation and experimental results verified the validity and effectiveness of the propose method.
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