基于自适应数字滤波的谐波检测

现代电力系统中,非线性负荷引起的谐波降低了系统对其它电力用户的供电质量,威胁着系统的安全经济运行。近年来发展起来的一种新型补偿措施－－有源电力滤波器,能有效抑制电力系统中非线性负荷引起的谐波污染。对谐波电流的快速准确检测是实现其功能的关键,研究了用于有源电力滤波器的谐波检测手段,在分析现有谐波检测手段的基础上,提出一种采用自适应数字滤波检测谐波电流的方法。这种方法简单,易于用ＤＳＰ实现,能满足有源

Harmonic Detection Based on Adaptive Digital Filtering

In modern electric power system, harmonics by nonlinear loads deteriorate power quality and decrease the security and economy of power delivery.In recent years, a novel apparatus, active power filter (APF), is developed. It is an effective measure to eliminate harmonic currents produced by nonlinear loads in system. The key technique to realize its function is the fast and precise detection of load currents' harmonic components. The harmonic detection methods used in APF are introduced, a new method to obtain the harmonic currents based on adaptive digital filtering is presented. It can be simply implemented with DSP to meet the requirement of harmonic detection by APF. Simulation results verified its feasibility.