有效值谐波检测法在UPQC中的应用

Application of RMS Harmonic Detection in UPQC

针对UPQC传统的谐波检测方法计算过程复杂,在电压畸变的情况下无法准确获得电压相位等缺陷,研究提出了一种基于解耦双同步参考坐标变换的锁相环(DDSRF-SPLL)结合有效值谐波检测方法的方案,在电压跌落、畸变的情况下仍能快速准确的实现对补偿量的检测。并在Matlab/Simulink环境下搭建了仿真,结果表明,此方法可行,能够在电网电压恶劣的情况下准确获得正序基波相位信息,补偿效果更好。

Traditional harmonic detection method for UPQC calculation is complex and the voltage phase can not be obtained accurately under the condition of voltage distortion.This paper proposes a phase-locked loop（DDSRF-SPLL）based on decoupled dual-synchronous reference coordinate transform combined with harmonic detection method for effective value scheme,without the need for coordinate transformation.In the case of voltage drop,distortion can still quickly and accurately achieve the detection of the amount of compensation.In this paper,the simulation is carried out in Matlab/simiulink environment.The results show that this method is feasible and can obtain the positive sequence fundamental phase information accurately in the case of poor grid voltage,and the compensation effect is better.