参数未知环境下PMU装置相角差校准方法设计  

Design of phase angle difference calibration method of PMU device in unknown environment

作　　者：颜红得 毕小熊 YAN Hong-de;BI Xiao-xiong(Yuxi Power Supply Bureau,Yunnan Power Grid Co.,Ltd.,Yuxi 653100,Yunnan Province,China)

机构地区：[1]云南电网有限责任公司玉溪供电局,云南玉溪653100

出　　处：《信息技术》2021年第1期131-135,141,共6页Information Technology

摘　　要：PMU装置相角量测的准确性将直接影响相角差校准的有效性,且在参数未知环境下,相角量测的误差将有所增大。为此,文中设计一种面向参数未知环境的PMU装置相角差校准方法。根据PMU装置的内部结构建立测量装置ms级的内守时钟,结合互感器、采样保持器和比较器获得相位,并计算相量,再根据相位和相量获得相角值与周期同步时标的偏移量,通过对偏移量进行修正实现对PMU装置相角差的校准。实验结果表明,文中设计的PMU装置相角差校准方法得到的相角质量更高,且相位测量精度权重更集中,说明该校准方法更适合应用在实际的工程项目中。The accuracy of phase Angle measurement in PMU device will directly affect the effectiveness of phase Angle difference calibration,and the error of phase Angle measurement will increase in the environment of unknown parameters.Therefore,a PMU device phase Angle difference calibration method is designed for unknown parameter environment.According to the internal structure of the PMU device,the s-level internal clock of the measuring device is set up,the phase is obtained by combining the transformer,the sampling holder and the comparator,and the phasor is calculated.Then,the phase Angle value is obtained according to the phase and phasor,and the offset of the phase Angle of the PMU device is corrected to realize the calibration of the phase Angle difference of the PMU device.The experimental results show that the PMU device phase Angle difference calibration method designed in this study has higher phase Angle quality,and the phase measurement precision weight is more concentrated,indicating that this method is more suitable for practical engineering projects.

关 键 词：误差 PMU装置 相角差 校准 同步时标偏移 

分 类 号：TM712[电气工程—电力系统及自动化]