十二相整流同步发电机同组星形连接绕组的相间短路故障

发布时间：2018-06-03 06:47

本文选题：十二相同步发电机 + 整流系统　；参考：《电力系统自动化》2017年08期

【摘要】：十二相整流同步发电机系统的安全可靠运行意义重大,分析了该系统中4Y移15°的定子绕组可能出现的一种内部故障——发生在同组星形连接三相绕组之间的内部相间短路。首先建立了十二相整流发电机同组星形连接绕组内部相间短路的多回路数学模型,考虑了故障附加回路对电机气隙磁场和系统回路拓扑结构的影响,实现了故障前后定子和转子绕组以及整流桥直流侧各处电压、电流的数字仿真。继而在特制的样机上进行了不同负载工况的故障实验研究。通过对比分析实验与仿真结果,说明了数学模型的正确性。最后结合仿真结果与理论分析,总结了十二相整流发电机同组星形连接绕组相间短路的故障特征,尤其是短路回路电流的特点及其影响因素,为故障的危害评估、检测或保护研究提供了依据。
[Abstract]:The safe and reliable operation of the 12-phase rectifier synchronous generator system is of great significance. This paper analyzes an internal fault that may occur in the stator winding with 4Y shift of 15 掳- the internal short circuit between the three phase windings of the same group of star connections. Firstly, a multi-loop mathematical model of interphase short-circuit in the same group of star connection windings of 12-phase rectifier generator is established, and the influence of the fault additional circuit on the air-gap magnetic field of the motor and the topology structure of the system loop is considered. Digital simulation of voltage and current of stator and rotor winding and DC side of rectifier bridge before and after fault is realized. Then the fault experiments of different load conditions are carried out on the special prototype. The correctness of the mathematical model is proved by comparing and analyzing the experimental and simulation results. Finally, combined with the simulation results and theoretical analysis, the fault characteristics of the interphase short circuit between the starlike connection windings of the 12-phase rectifier generator are summarized, especially the characteristics of the short-circuit current and its influencing factors, which are used to evaluate the harm of the fault. Detection or protection of the study provided a basis.
【作者单位】：电力系统及发电设备控制和仿真国家重点实验室清华大学;
【基金】：国家自然科学基金资助项目(51277103)~~
【分类号】：TM31

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