CAJ | 학술논문

良好的控制策略是实现并联型有源电力滤波器（active power filter，APF））b偿功能的关键。由于并联型APF常规电流PI控制方法的闭环增益受系统稳定性条件约束，并联型APF对负载主要谐波分量补偿不充分。针对该问题，提出一种用于APF的新型选择性谐波电流控制策略。该控制策略在常规电流PI控制策略的基础上，对负载电流主要谐波（该文主要指5次、7次谐波）单独提取与控制，而对其余次谐波采用一个常规电流PI控制器控制。该设计方法，增大了系统对主要谐波分量的跟踪增益，提高了APF对谐波的补偿率，实现了控制系统更好的频率响应。将该方法应用于实验室制作的一台30kVA并联型APF实验装置，可将电流总谐波畸变率（total harmonic distortion，THD）fl：l23．21％补偿为3．75％。仿真与实验结果证明了以上结论。
량호적공제책략시실현병련형유원전력려파기（active power filter，APF））b상공능적관건。유우병련형APF상규전류PI공제방법적폐배증익수계통은정성조건약속，병련형APF대부재주요해파분량보상불충분。침대해문제，제출일충용우APF적신형선택성해파전류공제책략。해공제책략재상규전류PI공제책략적기출상，대부재전류주요해파（해문주요지5차、7차해파）단독제취여공제，이대기여차해파채용일개상규전류PI공제기공제。해설계방법，증대료계통대주요해파분량적근종증익，제고료APF대해파적보상솔，실현료공제계통경호적빈솔향응。장해방법응용우실험실제작적일태30kVA병련형APF실험장치，가장전류총해파기변솔（total harmonic distortion，THD）fl：l23．21％보상위3．75％。방진여실험결과증명료이상결론。
In this paper, one conventional proportional integral （PI） control and one new current control, for shunt active power filters design, were compared. Because of the system stability constrained, the system loop gain of the PI control is restricted. Hence, in order to improve the system compensation performance, a new current control scheme for selective harmonics compensation was proposed for shunt active power filters. Based on the conventional PI control, the new method extracts the main harmonics （the 5th and 7th harmonics mainly） respectively, which are controlled by different PI controllers independently. Simultaneously, another PI controller is employed to deal with the other harmonics all together. The design method is provided, which increases the system loop gain to follow the main harmonics, improves the compensation capability of APFs, and achieves the control system an perfect frequency response. Conclusions are supported by both simulations and experimental results on a 30-kVA laboratory APF, indicating a reduction in line current THD factor from 23.21% to 3.75%.