基于调谐技术的谐波电能提取利用装置

Harmonic energy extraction device based on tuning technology

提出一种新型的基于基波磁通补偿原理与调谐滤波技术相结合,通过三绕组变压器在不取用基波功率的前提下获取电网中谐波电能的装置。通过合理设计变压器的3个绕组阻抗参数,使变压器原边与串联阻容电路形成调谐电路,从而使电网中的谐波电能流入变压器的原边。变压器三次侧绕组根据基波磁通补偿原理消除谐波电能中的基波无功;使二次侧绕组提取到不含基波无功的谐波电能,并经过变频装置变为可直接利用基频电能。在此基础上,利用Matlab对其稳态特性进行了仿真研究,并与直接滤波效果进行了对比,证明该原理的正确性。

A harmonic energy extraction device based on fundamental magnetic flux compensation and tuning filter technology is introduced,which applies a three-winding transformer to extract the harmonic energy of grid, without consuming the fundamental power. The impedance parameters of transformer windings are properly designed to form a tuning circuit by its primary side and the RC circuit,which induces the harmonic current of power grid to flow into the primary side of transformer. According to the principle of fundamental magnetic flux compensation,the tertiary winding of transformer is applied to eliminate the fundamental reactive power in harmonic energy. Therefore, the secondary winding of transformer extracts harmonic energy without fundamental reactive power, which becomes applicable fundamental frequency power via frequency converter. Its steady-state characteristics are simulated with Matlab and compared with those of normal filter,verifying its correctness.