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
针对采用电网电压定向矢量控制的三相两电平电压型PWM整流器,按内模控制原理对其各调节器的参数进行设计。在此基础上,对控制延迟、采样误差、系统参数偏差和模型结构不准确等非理想因素对调节器控制性能的影响进行研究,提出考虑系统非...针对采用电网电压定向矢量控制的三相两电平电压型PWM整流器,按内模控制原理对其各调节器的参数进行设计。在此基础上,对控制延迟、采样误差、系统参数偏差和模型结构不准确等非理想因素对调节器控制性能的影响进行研究,提出考虑系统非理想特性条件下,基于内模控制原理的调节器控制带宽设计方法,并以一套由55 k W PWM整流器带55 k W PWM逆变器-异步电机负载组成的四象限双PWM变频调速系统为例,进行仿真和实验验证。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.
文摘针对采用电网电压定向矢量控制的三相两电平电压型PWM整流器,按内模控制原理对其各调节器的参数进行设计。在此基础上,对控制延迟、采样误差、系统参数偏差和模型结构不准确等非理想因素对调节器控制性能的影响进行研究,提出考虑系统非理想特性条件下,基于内模控制原理的调节器控制带宽设计方法,并以一套由55 k W PWM整流器带55 k W PWM逆变器-异步电机负载组成的四象限双PWM变频调速系统为例,进行仿真和实验验证。
