基于电容补偿法的变压器电流回路检测方法  

Transformer current loop detection method based on capacitance compensation method

作　　者：李明远 汪向军 姜越 陆奔宇 柳德平 LI Mingyuan;WANG Xiangjun;JIANG Yue;LU Benyu;LIU Deping(Jiangsu Power Transmission and Transformation Co.,Ltd.,Nanjing 210028,China)

机构地区：[1]江苏省送变电有限公司,江苏南京210028

出　　处：《电子设计工程》2024年第2期74-77,82,共5页Electronic Design Engineering

基　　金：江苏省南京市科技项目(WF-CB-2022-071)。

摘　　要：为加快逆变电信号的回流速度,提升变压器电流回路对于电量信号的感应敏感性,针对基于电容补偿法的变压器电流回路检测方法展开研究。按照电容补偿法则,规划电容补偿线路,联合提取所得变电模量,求得电量补偿指标的具体数值,实现基于电容补偿法的变电回路建模。借助A/D转换器设备,定义电流互感参量的取值区间,结合已接入电量设备的内阻数值,计算电信号回流量的实值结果。对比实验结果可知,在电容补偿法作用下,逆变电信号的最大回流速度达到了9.5 A/ms,与限流控制方法相比,在提升变压器电流回路对于电量信号感应敏感性方面具有突出应用价值。In order to speed up the backflow speed of inverter signal and improve the induction sensitivity of transformer current loop to electric quantity signal,the transformer current loop detection method based on capacitance compensation method is studied.According to the capacitor compensation law,the capacitor compensation circuit is planned,the substation modulus is extracted jointly,the specific value of the electric quantity compensation index is obtained,and the substation circuit modeling based on the capacitor compensation method is realized.With the aid of A/D converter equipment,the value range of current mutual inductance parameters is defined,and the real value results of electric signal return flow are calculated combining with the internal resistance value of electric equipment.Comparative experimental results:under the action of capacitor compensation method,the maximum backflow speed of inverter signal reaches 9.5 A/ms.Compared with current limiting control method,it has outstanding application value in improving the sensitivity of transformer current loop to electric quantity signal induction.

关 键 词：电容补偿法 变压器 电流检测 变电模量 A/D转换器 逆变电信号 

分 类 号：TN108.7[电子电信—物理电子学]