摘要
为了分析新型换流变压器发生纵向不对称故障时的各电气量参数的变化情况,在研究新型换流变压器独特接线方案的基础上,通过相分量法建立了中性点不接地的新型换流变压器数学模型。基于所建立的数学模型,采用多态相分量法处理纵向故障的方法来计算新型换流变压器的纵向不对称故障。仿真结果验证了纵向不对称故障计算结果的正确性和精确性,这对新型换流变压器的继电保护发展具有一定的理论意义与实用价值。
In order to analyze the changes of electrical parameters when the longitudinal and asymmetric fault occurs on the new type converter transformer, based on the study of the special connection scheme about the new-type converter transformer, the mathematic model is presented according to the phase-coordinate method when the neutral point isn＇t earth connection. Based on the mathematical model, the polymorphic phase-coor- dinate method is adopted to calculate the longitudinal and asymmetric faults for new type converter transform- er. The results of simulation show the correctness of the longitudinal and asymmetric fault calculation method, which is of theoretical and practical significance for the relay protection of the new-type converter transformer.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2009年第5期56-62,共7页
Proceedings of the CSU-EPSA
关键词
换流变压器
数学模型
纵向故障
多态相分量法
继电保护
converter transformer
mathematic model
longitudinal fault
polymorphic phase-coordinate method relay protection
