A novel control strategy for three-phase shunt active power filter (SAPF) was proposed to improve its performance under non-ideal mains voltages. The approach was inspired by our finding that the classic instantaneous...A novel control strategy for three-phase shunt active power filter (SAPF) was proposed to improve its performance under non-ideal mains voltages. The approach was inspired by our finding that the classic instantaneous reactive power theory based algorithm was unsatisfactory in terms of isolating positive sequence fundamental active components exactly under non-ideal mains voltages. So, a modified ip-iq reference current calculation method was presented. With usage of the new method, not only the positive sequence but also the fundamental active current components can be accurately isolated from load current. A deadbeat closed-loop control model is built in order to eliminate both delay error and tracking error between reference voltages and compensation voltages under unbalanced and distorted mains voltages. Computer simulation results show that the proposed strategy is effective with better tracking ability and lower total harmonic distortion (THD). The strategy is also applied to a 10 kV substation with a local electrolysis manganese plant injecting a large amount of harmonics into the power system, and is proved to be more practical and efficient.展开更多
并联型有源电力滤波器(parallel active power filter,PAPF)存在着常规控制和直流侧电压反馈控制两种典型控制方式,但是对于两者之间的内在关联尚缺乏较深入的研究。该文对基于"p-q"理论的并联型APF常规控制进行等效和演化,...并联型有源电力滤波器(parallel active power filter,PAPF)存在着常规控制和直流侧电压反馈控制两种典型控制方式,但是对于两者之间的内在关联尚缺乏较深入的研究。该文对基于"p-q"理论的并联型APF常规控制进行等效和演化,通过数学推导发现:常规控制方法可认为是在直流侧电压反馈的基础上加入了负载基波电流前馈;且不同补偿目标下,前馈电流的成分也不同,可能是全部的负载基波电流,也可能是其中的有功分量。此外,在常规控制策略中的前馈作用和反馈作用大小也存在差别。最后,仿真和实验结果验证了上述分析的正确性。该研究对于理解和把握并联型APF的控制机制具有较重要的参考价值。展开更多
基金Project(JC200903180555A) supported by Shenzhen City Science and Technology Plan, China
文摘A novel control strategy for three-phase shunt active power filter (SAPF) was proposed to improve its performance under non-ideal mains voltages. The approach was inspired by our finding that the classic instantaneous reactive power theory based algorithm was unsatisfactory in terms of isolating positive sequence fundamental active components exactly under non-ideal mains voltages. So, a modified ip-iq reference current calculation method was presented. With usage of the new method, not only the positive sequence but also the fundamental active current components can be accurately isolated from load current. A deadbeat closed-loop control model is built in order to eliminate both delay error and tracking error between reference voltages and compensation voltages under unbalanced and distorted mains voltages. Computer simulation results show that the proposed strategy is effective with better tracking ability and lower total harmonic distortion (THD). The strategy is also applied to a 10 kV substation with a local electrolysis manganese plant injecting a large amount of harmonics into the power system, and is proved to be more practical and efficient.
文摘并联型有源电力滤波器(parallel active power filter,PAPF)存在着常规控制和直流侧电压反馈控制两种典型控制方式,但是对于两者之间的内在关联尚缺乏较深入的研究。该文对基于"p-q"理论的并联型APF常规控制进行等效和演化,通过数学推导发现:常规控制方法可认为是在直流侧电压反馈的基础上加入了负载基波电流前馈;且不同补偿目标下,前馈电流的成分也不同,可能是全部的负载基波电流,也可能是其中的有功分量。此外,在常规控制策略中的前馈作用和反馈作用大小也存在差别。最后,仿真和实验结果验证了上述分析的正确性。该研究对于理解和把握并联型APF的控制机制具有较重要的参考价值。
