一种基于Fryze无功理论的单相电路谐波电流检测新方法

针对传统单相电路检测方法的特点,解决传统方法存在的不足,以Fryze无功理论为基础,提出了一种单相电路谐波检测的新方法,该方法利用微分器来获取同步旋转角,避免了锁相环(PLL)给检测电路带来的延迟误差,引入积分模块,用积分运算替代数字低通滤波器(LPF),简化了检测电路,缩短系统的固有延迟,同时引入比例微分(PD)负反馈来提高系统的动态响应速度。通过仿真对比表明,此方法可准确无误的检测出补偿电流,提高了系统的实时性,在实际应用中具有有效性、可行性及经济性。

A New Method for Harmonic Detection Based on Fryze Inactive Power Theory in Single-phase Circuit

Against the features of the traditional single- phase circuit detection methods, in order to solve the shortcomings of conventional detection methods. The paper put forward a new method based on Fryze reactive power theory, is more suit able for single-phase circuit harmonic detection, which phase- locked loop section （PLL）, is removed, so eliminates brought error by the time delay of PLL. With integral operation alternatives the traditional digital low-pass filter （LPF）, simplifies the system and reducing the system＇s inherent delay. As the introduction of proportional-derivative （PD） negative feedback to enhance the dynamic response of the system. The simulation show that this method can accurately detecting the compensation current, enhance the real time response of the system, with effectiveness, feasibility and economics in practical applications.