文档介绍：第 40 卷第 10 期电力系统保护与控制
2012 年5月16日 Power System Protection and Control May 16, 2012
基于模型的新型变压器主保护判据分析
王雪,王增平
(华北电力大学新能源电力系统国家重点实验室,河北保定 071003)
摘要:提出一种基于模型的新型变压器主保护判据。分析了/接线变压器基于模型的主保护基本原理及其应用中面临的问
题,指出产生这些问题的根本原因。在增设一台侧线圈电流测量 CT 的基础上提出了按相构成的新型保护判据,该判据可以
反映变压器三相线圈漏阻抗不完全相同的现象,无需计算各侧线圈单独的漏阻抗参数,在各种运行状态下具有足够的可靠性
和灵敏性。利用 ATP 仿真软件获得变压器各种运行条件下的实验数据,分析结果表明了所提方法的正确性。
关键词:变压器保护;变压器模型;励磁涌流;内部故障;CT 配置
Analysis of a novel criterion of transformer protection based on model
WANG Xue, WANG Zeng-ping
(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University,
Baoding 071003, China)
Abstract: A novel criterion of transformer main protection based on model is presented. Firstly, the basic theory of the model based
main protection of transformer with /connected windings and the problems existing in its application are analyzed, and the
primary reason of those problems is pointed out. On the premise that an additional TA is installed to measure the winding current on
the deltaside, a novel criterion which is associated with each equation separately is presented, which can reflect that the leakage
impedances of three windings are not entirely the same. It is needless to calculate the impedances of the windings on each side
separately, and there are sufficient reliability and s