混合有源滤波器在低压电网中的应用与研究

发布时间：2018-04-08 10:18

本文选题：低压电网　切入点：有源电力滤波器　出处：《山东理工大学》2015年硕士论文

【摘要】：非线性器件在低压电网中的广泛应用,导致大量的谐波产生并对电网的电能质量构成了巨大的威胁。因此,设计一种用于低压电网谐波治理的装置非常必要。本文针对低压电网谐波特点设计出经济、可行的混合有源电力滤波器,主要工作包括以下几个方面。本文针对传统的有源电力滤波器容量越大费用越高的弊端,提出了减小有源电力滤波器容量的拓扑结构:把5、7次无源滤波器同有源滤波器并联使用;11次单调支路与有源滤波器分压;同时串入基波谐振支路使基波电压全部在谐振支路上,减少流过有源滤波器的基波电流。并对其各个元件参数进行了计算、选择。确定了滤波器的谐波检测方法。分析了基于瞬时无功理论的p qi?i谐波检测法与基于自适应理论检测法,通过仿真验证比较后选择电流跟踪速度快、补偿精度高的自适应检测法。确定了滤波器的控制方法。分析比较三角波比较法、滞环控制和电压空间矢量控制法的优缺点,最终选择性能优越的电压空间矢量法。利用MATLAB-Simulink仿真软件建立了混合有源滤波器仿真模型,仿真结果验证了能够有效滤除低压电网中的谐波。根据系统性能要求,设计了以TMS320F28335为核心的控制系统硬件电路、保护电路、包括电压传感器和电流传感器的采样电路。根据系统工作原理,设计了系统软件。
[Abstract]:The wide application of nonlinear devices in low-voltage power systems leads to a large number of harmonics and poses a great threat to the power quality of the power grid.Therefore, it is necessary to design a device for harmonic control of low voltage power network.In this paper, an economical and feasible hybrid active power filter (HAPF) is designed according to the harmonic characteristics of low voltage power network. The main work includes the following aspects.In this paper, we aim at the disadvantages of traditional active power filter with higher capacity and higher cost.The topology structure of reducing the capacity of active power filter is proposed: the 5 ~ 7 times passive filter and active power filter are connected in parallel using 11 times monotone branch and active power filter partial voltage, at the same time, the fundamental wave voltage is all on the resonant branch through the fundamental resonance branch.Reduce the fundamental current that flows through the active filter.The parameters of each component are calculated and selected.The harmonic detection method of filter is determined.This paper analyzes the p qi?i harmonic detection method based on instantaneous reactive power theory and the adaptive theory detection method. The adaptive detection method with high compensation accuracy and high current tracking speed is selected after the comparison of simulation results.The control method of filter is determined.The advantages and disadvantages of triangle wave comparison method, hysteresis control method and voltage space vector control method are analyzed. Finally, the voltage space vector method with superior performance is selected.The simulation model of hybrid active power filter (HAPF) is established by using MATLAB-Simulink software. The simulation results show that the HAPF can effectively filter harmonics in low-voltage power network.According to the requirement of system performance, the hardware circuit and protection circuit of control system based on TMS320F28335 are designed, including the sampling circuit of voltage sensor and current sensor.According to the working principle of the system, the system software is designed.
【学位授予单位】：山东理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN713.8;TM761

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