基于直接功率控制的混合滤波装置设计
首发时间:2011-05-03
摘要:根据某一矿井直流提升系统滤波的要求,设计并联混合型滤波装置,通过三组单调谐滤波器和一个高通滤波器滤除大部分谐波;针对有源滤波器的控制策略问题,提出了一种基于虚拟磁链定向直接功率控制的有源滤波系统,通过坐标变换实现电压和电流的解耦控制;设计新型虚拟磁链观测器观测电网磁链轨迹,不仅节省了电压传感器,而且提高了系统的抗干扰性。该混合滤波装置与单独使用无源和有源滤波装置相比,降低了有源滤波装置的容量,补偿性能更优良。
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Design of Hybird APF Based on Direct Power Control
Abstract:According to the requirements to harmonic elimination of a certain DC mining hoist system, a hybrid shunt active power filter (APF) is designed in this paper. The majority of the harmonics are eliminated by three set of single-tuned passive filters and a high-pass filter. Concerning the control problem of the APF, the strategy based on virtual-flux-oriented direct power control is adopted and by means of coordinate transformation, the voltage and current decoupling control is realized. A novel virtual-flux observer is designed to observe the flux trajectory of the power grid, which improves the immunity of the the system as well as saves voltage sensors. The hybird scheme demands less capacity of APF compared with adopting passive and active power filters repectively and represents more satisfactory compensation performance.
Keywords: HAPF Direct Power Control Virtual-flux-oriented
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