基于改进型傅氏算法的高压综合保护

High-voltage Integrated Protection Based on Improved Fourier Algorithm

针对现有的高压隔爆开关在实现综合保护时存在的问题,即在衰减直流分量干扰的作用下,采用通用的全波傅氏算法无法滤除衰减直流分量,容易产生误动和拒动,文章提出了一种改进型全波傅氏算法,该算法能完全滤除衰减直流分量及高次谐波信号。文章还给出了基于该算法的高压隔爆开关的硬件结构。实验证明,该算法可靠准确,计算量小,是一种可行的智能高压综合保护方法。

Aiming at the existing problem of high-voltage flameproof switch in realizing integrated protection,namely under influence of disturbance of decaying DC component, decaying DC component can not be filtered by traditional full wave Fourier algorithm, so that the protection will easily fail to operate or unwanted operate. The paper presented an improved full wave Fourier algorithm which could filter completely decaying DC component and higher order harmonic signal. It also gave hardware structure of high voltage flameproof switch based on the algorithm. The experiment proved this algorithmis is reliable and accurate and has a little calculated amount, and is a feasible method for intelligent high-voltage integrated protection.