基于同步相量的高密度量测数据压缩技术研究  

Research on compression technology of high density measurement data based on synchronous phasor

作　　者：蔡玉朋 李敏 张武洋 卢盛阳 廖于翔 Cai Yupeng;Li Min;Zhang Wuyang;Lu Shengyang;Liao Yuxiang(Electric Power Research Institute of State Grid Liaoning Electric Power Co.,Ltd.,Shenyang 110055,China;Wuhan Zhongyuan Huadian Science and Technology Co.,Ltd.,Wuhan 430223,China)

机构地区：[1]国网辽宁省电力有限公司电力科学研究院,沈阳110055 [2]武汉中元华电科技股份有限公司,武汉430223

出　　处：《电测与仪表》2020年第13期91-97,共7页Electrical Measurement & Instrumentation

基　　金：国家电网公司科技项目(5222LK17001T)。

摘　　要：针对目前电网故障分析中存在的覆盖范围单一、不适应网络化、系统化分析需求的问题,文中在同步相量测量装置和故障录波器普及化的前提下,通过研究故障录波器数据相量化压缩技术,将故障录波数据转化为广域测量系统数据,从而实现高密度量测数据源全覆盖。通过理论分析,研究了相量化算法中常用的算法结构,结合现场提出了向量化压缩算法流程,计算得到故障信号的幅值、相位、频率和频率变化率四个量,大大减少了数据冗余。最后通过仿真验证,分析了频率偏移、耦合谐波、幅值突变、相位突变、频率斜坡变化五种典型情况的相量压缩计算结果,结果表明文中提出的故障录波数据相量化压缩算法可有效降低数据冗余量,完全满足高密度量测数据分析要求。In view of the problems of single coverage,unsuitable for network and systematic analysis requirement in current power grid fault analysis,this paper studies the phase quantization compression technology of fault recorders data under the premise of popularization of PMU and fault recorder.It converts fault-recorded data into wide-area measurement system data,enabling full coverage of high density measurement data sources.Firstly,the algorithm structure commonly used in phase quantization algorithm is studied through theoretical analysis.Then,the vectorization compression algorithm flow is proposed combining with the field conditions,and the amplitude,phase,frequency and frequency change rate of the fault signal are calculated,which greatly reduces the amount of data redundancy.Finally,the phasor compression calculation results of five typical cases of frequency offset,coupled harmonics,amplitude abrupt change,phase abrupt change and frequency ramp change are analyzed by simulation.The results show that the compression algorithm can effectively reduce the amount of data redundancy and fully meet the requirements of high density measurement data analysis.

关 键 词：故障录波器 故障信号 向量化算法 数据压缩 

分 类 号：TM933[电气工程—电力电子与电力传动]