| 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。 |
| 关键词: 统一电能质量调节器 检测方法 锁相环 改进平均值滤波 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Research on UPQC Comprehensive Detection Method Based on Improved Park Transform |
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SUN Biao-zhi，GAO Xin，ZHOU Cong
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School of Electrical and Information Engineering， Anhui University of Science and Technology， Anhui Huainan 232001,China
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| 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). |
| Key words: UPQC detection method phase-locked loop improved mean value filtering |
