新型换流变压器保护方案设计  

Design of a Protection Scheme for the New Converter Transformer

作　　者：张杰[1] 罗隆福[1] R.K.Aggarwal 李勇[1] 刘福生[1] 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]巴斯大学电子与电气工程系

出　　处：《电力系统及其自动化学报》2010年第6期44-51,共8页Proceedings of the CSU-EPSA

基　　金：湖南省重大科技专项资助项目(06GK1003-1)

摘　　要：要实现新型换流变压器的产业化,制定与新型换流变压器配套的保护方案是重要的前提。文中对基于变压器模型的变压器保护原理进行研究,并将该保护原理的思路运用于新型换流变压器保护方案设计中,而且对动作特性方程进行梯形积分来构成保护判据。仿真结果验证了该保护方案可快速可靠地识别新型换流变压器正常运行状态和内部故障状态,并能有效地减少差分代替微分的误差,可以用作新型换流变压器微机主保护。If the industrialization of the new converter transformer needed to be realized,a protection scheme suitable for the new converter transformer should be designed in advance.A protection scheme based on the transformer model is studied,and applied to the protection scheme design for the new converter transformer,and then,the criterion is obtained by applying the trapezoidal integration to the action equations.Simulation results have proved the correctness of protection scheme designed by this paper,which can distinguish the normal conditions and internal fault of the new converter transformer rapidly and reliably,and effectively reduce the errors caused by the use of difference instead of differential.The proposed method can be used as microcomputer based main protection for the new converter transformer.

关 键 词：换流变压器 变压器保护 变压器模型 梯形积分 内部故障 微机保护 

分 类 号：TM714[电气工程—电力系统及自动化]