基于Matlab的三相双绕组变压器的研究

变压器是电力系统中的主设备之一,对它的研究是很有必要的。本文用Matlab对三相双绕组变压器进行仿真研究。对变压器产生保护误动,空载合闸以及单相对地短路的原因进行仿真分析,在此基础上,对三相双绕组运行状态和故障状态进行研究,主要是对单相,两相短路和三相短路进行模拟仿真。指出在三相变压器里,三绕组变压器的特性及结构与双绕组仍然是基本一致的,即相当于两个双绕组变压器;变压器中的不对称现象是由外施电压的不对称和负载的不对称而引起的。这两种原因都将导致二次电压不对称。当发生短路故障时,将会影响变压器的正常运行。实验表明,本文不仅具有理论意义,而且具有实际意义。

Research on three-phase two-simulation transformer Based on MATLAB

Transformer is the power system of one of the main equipment,Its study is necessary o In this paper, using Matlab studied threehase transformer winding two-simulation. Protection of transformer malfunction, closing empty and relatively short circuit＇s reason for simulation analysis, on this basis,studying three-phase windings of the two-state operation and fault state, it is mainly for single-phase, two-phase and threephase short-circuit short for Simulation. The results show that in the three-phase transformer, the characteristics and structure of three-phase transformer is consist with two-simulation transformer, That is equivalent to two double-winding transformers; asymmetry of Transformer is from the outside in the applied voltage and the asymmetry of load is caused by asymmetric. Two reasons for this will lead to secondary voltage asymmetry. When a short-circuit fault, transformer will affect the normal operation. Experiments show that paper is not only theoretical significance, but also has practical significance,