用于非技术损失识别的非侵入式电能表设计  

Design of Non-intrusive Watt-hour Meter for Non-technical Loss Identification

作　　者：朱明增 ZHU Mingzeng(Hezhou Power Supply Bureau of Guangxi Power Grid Co.,Ltd.,Hezhou 542800,China)

机构地区：[1]广西电网有限责任公司贺州供电局,广西贺州542800

出　　处：《微型电脑应用》2023年第4期199-201,共3页Microcomputer Applications

摘　　要：传感器耦合电容的变化会导致电容式交流电压探头测量精度低的问题,因此提出了一种用于非技术损失识别的非侵入式低压交流电能表设计,以实现对窃电行为的识别和提高电能表的测量精度。该电能表中有功功率是由电压和电流波形以及它们之间的相位差计算出来的,不需要测量电压幅值。电能表由一个商用非侵入式电流传感器(夹钳式电流互感器)和一个用于测量电压相位和波形的非接触电容式电压传感器组成。电压传感器包括一个屏蔽装置,以隔离外部电场,使电能表适用于多相系统。所设计的电能表不需要现场校准,不需要与相导体接触,也不需要开路,可以快速、安全、方便地安装在架空线上。实验结果表明,所研制的电能表对电缆的特性(宽度和绝缘)、外部电场以及电压传感器的电容变化不敏感,实际两相安装工况下的有源能量测量误差为1%。With the increasing permeability of renewable energy in the distribution network,a large number of distributed energy storage systems are connected through power electronic converters,so as to improve the frequency and voltage stability under abnormal circumstances.On this basis,this paper proposes a voltage frequency coordinated support control method for distributed energy storage system of distribution network,ittakes into account the impedance ratio of distribution network.Being different from the voltage and frequency decoupling in the traditional transmission network support scheme,this method takes into account the coupling problem of voltage and frequency in the low-voltage distribution network due to the impedance characteristics of the network.In order to improve the frequency stability of the distribution network,the proposed method takes into account the frequency support and the virtual inertia control based on the droop characteristics,and ensures the balanced compensation between the voltage and frequency support of the distribution network by using the adaptive gain calculated online by the root short-circuit fault characteristics.Finally,the simulation results demonstrate the effectiveness and superiority of the proposed method.

关 键 词：交流电压测量 电容式探头 电能表 非接触式设备 非侵入式设备 

分 类 号：TM28[一般工业技术—材料科学与工程]