基于三角正交法则的SAPF谐波检测方法

SAPF Harmonic Detection Method Based on Triangle Orthogonal Principle

谐波电流检测是有源电力滤波器控制算法生成用于谐波补偿的参考电流的关键环节。提出了一种基于三角正交原理的新型谐波电流检测方法,所提方法与传统的谐波电流检测方法相比,主要优点是结构简单、计算量低和执行时间快。利用电网信号同步的锁相环检测到的相位信号,基于三角正交原理的方法可以提供一种提取参考电流的简便方法。同时,由于所提方法具有更低的实现复杂性和更少的微控制器资源消耗,因此,可以使用低成本微控制器来实现,具有实际工程价值。最后,对提出的方法进行了详细分析,并通过实验结果验证了其有效性和优越的性能。

Harmonic current detection is a key issue for shunt active power filter control algorithms,which is to generate reference currents for harmonic compensation. A new harmonic current detection method based on the triangle orthogonal principle was proposed. Compared with traditional harmonic current detection methods,the proposed method has the advantages of simple structure,low calculation,and fast execution time. Using the phase signal detected by the phase-locked loop synchronized with the power grid signal,the method based on the triangle orthogonal principle can provide a simple method to detect the reference current. At the same time,because the method proposed has lower implementation complexity and less microcontroller resource consumption,low-cost microcontrollers can be used to implement,which has practical engineering value. Finally,It analyzes the proposed method in detail and verifies its effectiveness and superior performance through experimental results.