数据驱动的电能表运行状态在线监测方法  

Data-driven online monitoring method of running state of electricity meter

作　　者：赖国书 Lai Guoshu(Marketing Service Center,State Grid Fujian Electric Power Co.,Ltd.,Fuzhou 350011,China)

机构地区：[1]国网福建省电力有限公司营销服务中心,福州350011

出　　处：《电测与仪表》2023年第4期193-200,共8页Electrical Measurement & Instrumentation

基　　金：福建省科技计划项目(2021R1016006)。

摘　　要：针对在线电能表运行状态存在监测空白点,业务管控存在专业壁垒导致相关电力数据获取难度大,现有监测方法单一等问题,提出覆盖低压侧、中压侧和关口侧数据驱动的电能表运行状态在线监测方法。在低压侧,通过分元器件比对方法定位失准电能表,为低压侧电能表运行状态在线监测提供了新的计算方法。在中压侧,考虑变压器外部特性,递推得到的变压器高压侧三相线电压,并以递推线电压与参考点线电压差值的平方和最小为优化目标,同时满足电压压降、相角偏移等电气节点约束条件,构建高供低计专变用户电能表在线监测优化模型,计算中压侧电能表运行误差。在高压侧,通过构建主变模型、母线层级与线路层级三个层级电量比对模型,运用交叉定位方法计算关口侧电能表运行误差。通过实际算例验证所提方法的正确性和有效性。Aiming at the problems such as the existence of monitoring blank spots in the operation state of the electricity meter,the difficulty in obtaining relevant power data due to the professional barriers in business management,and the single existing monitoring method,a data-driven online monitoring method of running state of electricity meter is proposed covering the low-voltage side,the medium-voltage side and the gateway side.On the low-voltage side,the misaligned electricity meter is located by the sub-component comparison method,which provides a novel calculation method for the online monitoring of the running state of the electricity meter on the low-voltage side.On the medium-voltage side,considering the external characteristics of the transformer,the three-phase line voltage on the high-voltage side of the transformer is obtained by recursion.The optimization goal is to minimize the sum of the squares of the difference between the recursive line voltage and the line voltage at the reference point,and satisfy the constraints of electrical node,such as voltage drop,angular offset,build the online monitoring optimization model of electricity meter for high-voltage side power supply and low-voltage side metering of special transformer users,and calculate the operation error of the medium-voltage side electricity meter.On the high-voltage side,it proposes three-level electricity comparison model which includes main transformer model,bus level and line level.Then,cross-location method is used to calculate the operating error of the electricity meter at the gateway side.The validity of the proposed method is verified by practical examples.

关 键 词：电能表 运行状态 数据驱动 分元件 变压器外部特性 交叉定位 

分 类 号：TM933[电气工程—电力电子与电力传动]