该文面向存在脉冲干扰的配电网信号环境,研究脉冲干扰检测、精确定位和基于干扰剔除的同步相量测量算法。首先,根据同步相量测量单元(phasormeasurementunit,PMU)测量值进行基波重构,通过分析重构残差序列定义特征参数残差总向量(total ...该文面向存在脉冲干扰的配电网信号环境,研究脉冲干扰检测、精确定位和基于干扰剔除的同步相量测量算法。首先,根据同步相量测量单元(phasormeasurementunit,PMU)测量值进行基波重构,通过分析重构残差序列定义特征参数残差总向量(total vector of the residual,TVR),用以表征PMU测量误差。其次,提出基于TVR和残差瞬时功率异常值判别的方法,实现脉冲干扰检测和精确定位。最后,基于相量测量的最优滤波原理设计出改进加权最小二乘算法,实现脉冲干扰下同步相量的快速准确测量。仿真结果表明,在数据窗长为2个周波(P类测量),当脉冲干扰长度不超过半个周波时,该文算法在典型配电网环境下达到IEEE标准规定的测量误差要求(TVE<1%),且对脉冲干扰持续时间和强度表现出较强的鲁棒性。展开更多
Simultaneous human activities,such as the Super Bowl game,would cause certain impacts on frequency fluctuations in power systems.With the help of FNET/GridEye measurements,this paper aims to give comprehensive analyse...Simultaneous human activities,such as the Super Bowl game,would cause certain impacts on frequency fluctuations in power systems.With the help of FNET/GridEye measurements,this paper aims to give comprehensive analyses on the frequency fluctuations during Super Bowl LIV held on Feb.2,2020,so as to better understand several phenomena caused by simultaneous activities which will help system operations and controls.First,recent developments of the FNET/GridEye are briefly introduced.Second,the frequency fluctuations of the Eastern Interconnection(El),western electricity coordinating council(WECC),and electric reliability council of Texas(ERCOT)power systems during Super Bowl LIV are analyzed.Third,frequency fluctuations of Super Bowl Sunday and ordinary Sundays in 2020 are compared.Finally,the differences of frequency fluctuations among different years during the Super Bowl and their change trends are also given.Furthermore,several possible explanations,including the simultaneity of electricity consumption at the beginning of commercial breaks and the halftime show,the increasing usage of the Internet,and the increasing size of TV screens,are illustrated in detail in this paper.展开更多
随着分布式新能源渗透率不断提高,智能配电网电力电子化趋势明显,电气参数更加复杂,亟需研究适用于配电网的同步相量测量装置(Synchrophasor measurement unit for distribution network,D-PMU)。然而,现有通信协议与条件无法满足D-PMU...随着分布式新能源渗透率不断提高,智能配电网电力电子化趋势明显,电气参数更加复杂,亟需研究适用于配电网的同步相量测量装置(Synchrophasor measurement unit for distribution network,D-PMU)。然而,现有通信协议与条件无法满足D-PMU的接入需求。针对该问题,该文设计一种适用于D-PMU的基频相量、谐波/间谐波同步测量、异步传输的结构框架,提出一种谐波/间谐波的数据传输协议,减少了通信负担。在上述框架的条件下,分析网络通信延时与丢包率的影响因素,搭建通信性能测试平台,进行通信性能实际测试,验证所提通信方法的可行性,并根据测试结果提出一种D-PMU通信接入参数的设置方法。展开更多
文摘该文面向存在脉冲干扰的配电网信号环境,研究脉冲干扰检测、精确定位和基于干扰剔除的同步相量测量算法。首先,根据同步相量测量单元(phasormeasurementunit,PMU)测量值进行基波重构,通过分析重构残差序列定义特征参数残差总向量(total vector of the residual,TVR),用以表征PMU测量误差。其次,提出基于TVR和残差瞬时功率异常值判别的方法,实现脉冲干扰检测和精确定位。最后,基于相量测量的最优滤波原理设计出改进加权最小二乘算法,实现脉冲干扰下同步相量的快速准确测量。仿真结果表明,在数据窗长为2个周波(P类测量),当脉冲干扰长度不超过半个周波时,该文算法在典型配电网环境下达到IEEE标准规定的测量误差要求(TVE<1%),且对脉冲干扰持续时间和强度表现出较强的鲁棒性。
基金supported by the NSF Cyber-Physical Systems(CPS)Program under award number 1931975.
文摘Simultaneous human activities,such as the Super Bowl game,would cause certain impacts on frequency fluctuations in power systems.With the help of FNET/GridEye measurements,this paper aims to give comprehensive analyses on the frequency fluctuations during Super Bowl LIV held on Feb.2,2020,so as to better understand several phenomena caused by simultaneous activities which will help system operations and controls.First,recent developments of the FNET/GridEye are briefly introduced.Second,the frequency fluctuations of the Eastern Interconnection(El),western electricity coordinating council(WECC),and electric reliability council of Texas(ERCOT)power systems during Super Bowl LIV are analyzed.Third,frequency fluctuations of Super Bowl Sunday and ordinary Sundays in 2020 are compared.Finally,the differences of frequency fluctuations among different years during the Super Bowl and their change trends are also given.Furthermore,several possible explanations,including the simultaneity of electricity consumption at the beginning of commercial breaks and the halftime show,the increasing usage of the Internet,and the increasing size of TV screens,are illustrated in detail in this paper.
文摘随着分布式新能源渗透率不断提高,智能配电网电力电子化趋势明显,电气参数更加复杂,亟需研究适用于配电网的同步相量测量装置(Synchrophasor measurement unit for distribution network,D-PMU)。然而,现有通信协议与条件无法满足D-PMU的接入需求。针对该问题,该文设计一种适用于D-PMU的基频相量、谐波/间谐波同步测量、异步传输的结构框架,提出一种谐波/间谐波的数据传输协议,减少了通信负担。在上述框架的条件下,分析网络通信延时与丢包率的影响因素,搭建通信性能测试平台,进行通信性能实际测试,验证所提通信方法的可行性,并根据测试结果提出一种D-PMU通信接入参数的设置方法。
