基于等值回路平衡方程的变压器保护原理.pdf

文档介绍：第 26 卷第 10 期中国电机工程学报 July 2006
2006 年 5 月 Proceedings of the CSEE ©2006 .
文章编号:0258-8013 (2006) 07-0000-05 中图分类号:TM771 文献标识码:A 学科分类号:470×40
基于等值回路平衡方程的变压器保护原理
1 1 2 1 1 3
郝治国, 张保会, 褚云龙, 段建东,李朋,张前锋
(,陕西省西安市 710049; 2. 西北电网有限公司,陕西省西安市 710048;
,陕西省西安市 710077)

Study on Transformer Protection Principle Based on Equivalent Circuit
Equilibrium Equation
HAO Zhi-guo1, ZHANG Bao-hui1, CHU Yun-long2, Duan Jian-dong1, LI Peng1,Zhang Qianfeng3
(1. Xi’an Jiaotong University, Xi’an 710049, Shaanxi Province, China; 2. Northwest China Grid Co., Ltd., Xi’an 710048,
Shaanxi Province,China; 3. Xi’an Xidian Transformer Co., Ltd., Xi’an 710077, Shaanxi Province, China)
ABSTRACT: The value of equilibrium equation is zero 难以求取,且在运行过程中绕组变形将会导致漏感参数发生
derived from the equivalent circuit equation of the primary and 变化,文中采用最小二乘算法对变压器漏感参数进行实时在
second winding during normal operation conditions, 线估算,以提高算法灵敏度。动模试验表明:该算法原理清
izing inrush and external fault. It is not equal to zero 晰,能够不受励磁涌流的影响,快速可靠地识别变压器各种
during an internal winding fault, ground fault and phase fault. A 故障,且特征明显,其动作门坎有较大的裕度。
new transformer protection algorithm based on the equivalent
关键词:电力系统;变压器保护;等值回路平衡方程;励磁
circuit equilibrium equation is described in this paper. For a
涌流;内部故障;互感磁通;漏电感;最小二乘
single-phase and a three-phase Y