摘 要:在现代社会中,工业、民用等建筑中大量存在非线性用电设备,导致了电网中高次谐波的迅速增长,引起供电电压波形畸变,降低了电能质量。因此,研究并实现电网谐波的有效抑制,对改善供电质量有着重要的指导作用。本文从谐波的定义、谐波的产生、谐波的危害、谐波的检测和谐波抑制几方面进行了论述,尤其对电网谐波抑制进行了深入研究,分析了有源滤波器的电路结构及工作原理,并对其控制方法进行一定研究。在Matlab软件环境下,本文建立有源滤波器的仿真模型, 采用基于瞬时无功功率的 谐波检测算法进行仿真实验。仿真结果表明,在合理的参数配置下,有源滤波器对谐波源具有良好的抑制作用。4675
关键词:电网;谐波抑制;有源滤波器;Matlab
Research on Suppression of Power System Harmonic
Abstract: In modern society, nonlinear electrical equipments abound in industrial and civil buildings, resulting in a rapid growth of high-order harmonics, causing the harmonic distortion of supplied voltage and reducing the whole quality of power. Therefore, it plays an important role to research and further complete the control of harmonics in improving the quality of power supply. In this paper, the definition, generation, hazard, detection and suppression of harmonics will be discussed. Especially, an intensive study will be given to the harmonic suppression. With the analysis of the circuit structure and working principle of the active power filter and its control method. Under the condition of Matlab software, an active filter simulation model is established, based on instantaneous reactive power harmonic detection algorithm to simulate. The simulation result shows that an active filter has a significant inhibitive effect on harmonic source under reasonable parameter configuration.
Key Words: Power grid; Harmonic suppression; Active filter; Matlab
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