摘要
研究以一台四分裂式变压器为例,利用其对称性建立基于ANSYS的1/2"场-路"耦合的轴对称分析模型。首先,通过分析空载及单个低压绕组运行的有关参数验证了模型的正确性。接着,计算了多种工况匝间短路故障的有关特性,包括同一绕组分上、中、下不同部位发生的匝间短路;在同一部位发生的不等匝数短路;在三个不同部位选取一定匝数的金属性短路和经小电阻短路;以及故障在高、低压侧发生等。最后,在对结果进行分析的基础上指出故障发生位置具有某些特征。
Taking a transformer with 4-split types of windings as example,an axis symmetric model for a1/2 field-circuit coupling analysis is established in the paper on consideration of its structural symmetry,and the correctness of the model is first verified by analysis of the parameters related to the operation of the transformer under no-load or with only a low voltage windings.Then,the characteristics of turn-to-turn short-circuit fault are analyzed for many cases that the faults happen in the upper,middle,and lower parts of a winding or with different numbers of turns in the same part of it.Moreover the metallic short circuit and the short circuit through small resistance are studied by selecting a certain number of short circuit turns at the three different positions,and the faults occur on the high or low voltage windings,etc.Finally,the results are discussed and some characteristics of the fault location are pointed out.
作者
欧阳子霖
李晓松
鲍锡阳
胡军
OUYANG Zi-lin;LI Xiao-song;BAO Xi-yang;HU Jun(Hunan Province Key Laboratory of Intelligent Power Grid Operation and Control,Changsha University of Science and Technology,Changsha410004,China)
出处
《电力学报》
2020年第1期13-19,52,共8页
Journal of Electric Power
基金
湖南省战略新兴产业科技攻关项目(2016GK4038).
关键词
“场-路”耦合
分裂式变压器匝间短路
不同工况
故障位置特征
field-circuit coupling method
turn to turn fault of transformer with split types of windings
different operating conditions
characteristics of the fault location