新型换流变压器数学模型和短路故障计算  

Mathematical Model Building and Short-circuit Fault Calculation of New Converter Transformer

作　　者：闫金凯 

机构地区：[1]河北省承德钢铁公司自动化部,承德067002

出　　处：《电力系统及其自动化学报》2010年第5期121-127,共7页Proceedings of the CSU-EPSA

摘　　要：新型换流变压器数学模型和短路故障计算是其运行特性研究以及配套继电保护与自动装置设计的基础。为此,在建立包含新型换流变压器的电力系统数学模型时,把该电力网络分成互感支路和无互感支路网络,对这两种网络分别建立节点导纳矩阵,然后相加求得整个电网络的数学模型,并根据所建的数学模型,采用多态相分量法对新型换流变压器的各种节点短路故障进行了研究计算。实际算例验证了所建立的数学模型及短路故障计算的正确性。Model building and short-circuit faults calculation in the new converter transformer are the basis of research on its operating characteristics,relay protection and design of automatic device.A mathematic model of the electrical system containing the new converter transformer was proposed in the paper,and the electric network is divided into two parts：mutual and non-mutual inductance branches.The node admittance matrixes of two parts are built separately and then the mathematic model of whole electric network is obtained with adding both matrixes.Based on the established model,the polymorphic phase components method is used to study and calculate all kinds of nodal short-circuit faults of the new converter transformer.Experimental results verified the correction of the proposed mathematical model and short-circuit fault calculation.

关 键 词：换流变压器 数学模型 多态相分量 短路故障 电力网络 

分 类 号：TM714[电气工程—电力系统及自动化]