基于配电网谐波责任划分的分布式有源滤波系统

发布时间：2018-07-13 21:15

【摘要】：随着电力电子装置的广泛应用和多种分布式能源的接入,低压配电网的电能质量问题已日益突出。为改善多馈线型低压配电网公共连接点(PCC)处的电能质量,降低其电压谐波失真,以具有谐波补偿功能的单相光伏并网设备为基本单元,构建了一个分布式有源滤波系统。通过分析低压配电网中各馈线对PCC处电压谐波的责任,对各馈线的谐波补偿任务进行了优化调整。此外,采用基于虚拟谐波阻抗的下垂控制方法,实现了多设备并联时的自主协调,并提出了一种参考PCC处谐波责任的谐波补偿容量分配算法,提升了在输出容量限制情况下分布式有源滤波系统的谐波补偿效果。最后,通过软件对上述模型和控制策略进行了建模与仿真,仿真结果验证了该系统的可行性和有效性。
[Abstract]:With the wide application of power electronic devices and the access of a variety of distributed energy sources, the problem of power quality in low-voltage distribution networks has become increasingly prominent. In order to improve the power quality at common connection points (PCC) of multi-fed low-voltage distribution network and reduce the voltage harmonic distortion, a distributed active filter system is constructed based on single-phase photovoltaic grid-connected equipment with harmonic compensation function. By analyzing the responsibility of each feeder to the voltage harmonics at PCC in the low voltage distribution network, the harmonic compensation task of each feeder is optimized and adjusted. In addition, the droop control method based on virtual harmonic impedance is used to realize the autonomous coordination of multiple devices in parallel, and a harmonic compensation capacity allocation algorithm with reference to harmonic responsibility at PCC is proposed. The harmonic compensation effect of distributed active filter system with limited output capacity is improved. Finally, the model and control strategy are modeled and simulated by software, and the simulation results verify the feasibility and effectiveness of the system.
【作者单位】：同济大学电子与信息工程学院;
【基金】：中央高校基本科研业务费专项资金资助项目(0800219170) 浙江省科技计划项目(2013C01063)~~
【分类号】：TM761

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