基于电子式电流互感器的采样值差动保护研究  

Research on Differential Protection of Sampled Value Based on Electronic Current Transformer

作　　者：姜雅飞[1] 缪盛泽 JIANG Ya-fei;MIAO Sheng-ze(Dept.of Marine Engineering,Nantong Vocational ＆ Technical Shipping College,Nantong 226010,China;School of Mechanical Electronics Engineering,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]南通航运职业技术学院轮机工程系,江苏南通226010 [2]南京林业大学机械电子工程学院,江苏南京210037

出　　处：《南通航运职业技术学院学报》2018年第2期53-57,共5页Journal of Nantong Vocational & Technical Shipping College

基　　金：江苏高校品牌专业建设工程资助项目(LJPP6-15)

摘　　要：采样值差动保护原理的保护装置可以直接利用电子式电流互感器的数字化输出的采样数据,加快保护出口跳闸,简化保护配置。采样值电流差动保护优于传统电流差动保护制动效果的条件是:必须在半个周期中有大于1/4周波的角度范围满足动作判别方程,即S>N/4。电子式电流互感器采样频率会影响采样值差动保护动作,采样频率越高,在复平面上采样值差动保护动作的模糊区就越小,保护装置的动作可靠性就越高。The protective device based on differential protection principle of sampled value can directly utilize digital sampling data output from an electronic current transformer to accelerate protection of outlet tripping and simplify protection configuration. The condition that the sampled value current differential protection is superior to the traditional one in braking effect is that angular range greater than 1/4 of the cycle must be satisfied in half cycle, i.e., SN/4. The sampling frequency of the electronic current transformer affects the differential protection of the sampled value. The higher the sampling frequency is, the smaller the blurred area of the differential protection on complex plane will be, and the higher the operational reliability of the protection device will be.

关 键 词：电子式互感器 采样值差动保护 采样算法 

分 类 号：TM452[电气工程—电器]