基于微网谐波治理的有源电力滤波器研究

发布时间：2018-05-05 23:59

本文选题：微网 + 并联有源电力滤波器　；参考：《安徽理工大学》2014年硕士论文

【摘要】：为了有效的控制微网谐波,改善电能质量,本文给出了模糊直接功率控制(Fuzzy Direct Power Control:F-DPC)和LCL滤波器复合控制策略,在此控制策略下对并联有源电力滤波器(Shunt Active Power Filter:SAPF)进行研究。本文简单介绍了课题研究背景意义,有源电力滤波的发展现状,以及微网的概况和控制策略。分析分布式电源并网对电网的电能质量的影响,以及微网谐波的产生和改善方法。对分布式电源的控制要求和控制策略进行分析,运用有源电力滤波器对谐波进行抑制和无功补偿。对APF的控制方法、锁相理论、模糊直接功率控制、直流侧电压的控制、LCL滤波器等控制环节进行了详细的设计过程介绍,并分析了各个环节的控制特性。模糊直接功率控制控制着电力滤波器的直流侧电压,有功功率和无功功率的传输,LCL滤波器具有较高的滤波性能。在Matlab/Simulink仿真软件平台进行仿真研究。对应于给出的谐波治理方法,搭建微网有源滤波器的仿真电路,仿真建模验证分析。稳态和瞬态状态的结果说明所提出的控制方案控制性能稳定。仿真结果表明F-DPC控制器能够迅速抑制的非线性负载谐波,改善电能的质量,且线电流非常接近正弦波,谐波含量远低于国家标准5%要求。因此,在有源电力滤波器中,模糊直接功率控制和LCL结合技术可以作为控制谐波、改善电能质量的一种有效方法。
[Abstract]:In order to effectively control micro-grid harmonics and improve power quality, a hybrid control strategy of fuzzy Direct Power control: F-DPCand LCL filter is presented in this paper. The shunt active power filter (shunt Active Power filter: SAPF) is studied under this control strategy. This paper briefly introduces the research background significance, the development status of active power filter, as well as the general situation of microgrid and control strategy. This paper analyzes the influence of distributed generation and grid connection on power quality, and the generation and improvement methods of micro-grid harmonics. The control requirements and control strategies of distributed power generation are analyzed, and active power filter is used to suppress harmonics and compensate reactive power. The control method, phase-locked theory, fuzzy direct power control and DC voltage control are introduced in detail, and the control characteristics of each link are analyzed. Fuzzy direct power control controls the DC side voltage, active power and reactive power transmission of power filter LCL filter has high filtering performance. The simulation research is carried out on the Matlab/Simulink simulation software platform. The simulation circuit of microgrid active power filter is built, and the simulation model is verified and analyzed. The results of steady state and transient state show that the control performance of the proposed control scheme is stable. The simulation results show that the F-DPC controller can quickly suppress the nonlinear load harmonics and improve the power quality, and the line current is very close to sine wave, and the harmonic content is far below the requirement of 5% of the national standard. Therefore, in active power filter, the combination of fuzzy direct power control and LCL can be used as an effective method to control harmonics and improve power quality.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN713.8;TM761

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