基于改进的Park变换的UPQC综合检测方法研究
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Research on UPQC Comprehensive Detection Method Based on Improved Park Transform
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    摘要:

    针对传统基于瞬时无功功率检测中使用锁相环而引起的检测误差,在Park变换原理的基础上,提出了给Park变换矩阵中的角频率一个固定的值,从而省去锁相环,简化了检测电路;针对传统低通滤波器响应有延迟,滤波效果差,分析了平均值滤波法的缺点,提出将改进的平均值滤波模块与低通滤波器相串联的方式;采用Matlab/Simulink平台,搭建检测电路的仿真模型,仿真分析了在三相电网不平衡且发生畸变时的检测效果,结果表明:采用改进的检测法不仅保证了滤波的准确性,还提高了检测的快速性,满足统一电能质量调节器(UPQC)的检测要求。

    Abstract:

    In view of the traditional detection error caused by the use of phase-locked loops in instantaneous reactive power detection, on the basis of the principle of Park transformation, it is proposed to give a fixed value to the angular frequency in the Park transformation matrix, thereby eliminating the phase-locked loop and simplifying the detection circuit. As the response of the traditional low-pass filter is delayed and the filtering effect is poor, the shortcomings of the average filtering method are analyzed, and a method of connecting the improved average filtering module and the low-pass filter in series is proposed. The Matlab/Simulink platform is used to build a simulation model for the circuit detection, and the detection effect is analyzed when the three-phase power grid is unbalanced and distorted. The results show that the use of the improved detection method not only ensures the accuracy of the filtering, but also improves the detection speed and meets the detection requirements of the unified power quality conditioner (UPQC).

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孙标志,高昕,周聪.基于改进的Park变换的UPQC综合检测方法研究[J].重庆工商大学学报(自然科学版),2021,38(3):58-64
SUN Biao-zhi, GAO Xin, ZHOU Cong. Research on UPQC Comprehensive Detection Method Based on Improved Park Transform[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),2021,38(3):58-64

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  • 在线发布日期: 2021-05-28
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