双馈感应发电机绕组匝间短路故障分析
发布时间：2018-10-05 08:39
【摘要】：绕组匝间短路故障作为双馈感应发电机的一种常见故障，对发电机以及风电系统具有较大危害。因此，双馈感应发电机绕组匝间短路故障的研究，对保护风力发电机的安全运行以及提高风电系统的运行效率具有重要的意义。 本文以多回路理论为基础，建立了双馈感应发电机正常情况及发生定子绕组匝间短路故障、转子绕组匝间短路故障时的数学模型。建模过程中，讨论了回路的选取原则、匝间短路故障的设置方法。 基于MATLAB仿真软件，编写了双馈感应发电机多回路模型的程序，并对双馈感应发电机的电感参数进行了计算。计算过程中，考虑了谐波以及槽漏感、端部漏感的影响。 研究了双馈机发生定子绕组匝间短路后，，电磁特性的变化，总结了转子电流中的谐波成分，仿真结果与理论分析相吻合。此外，文中还总结了定子线电流相位角、幅值的变化规律。 研究了转子绕组匝间短路后，电磁特性的变化，总结了定子一条支路电流、线电流以及并联支路间环流中的谐波含量。 通过对双馈感应发电机绕组故障机理和故障特征的分析，可以为双馈感应发电机绕组故障早期诊断与状态监测提供有价值的理论依据。
[Abstract]:As a common fault of doubly-fed induction generator, winding inter-turn short circuit is harmful to generator and wind power system. Therefore, the study of inter-turn short-circuit fault in windings of doubly-fed induction generator is of great significance to protect the safe operation of wind turbine and improve the operational efficiency of wind power system. Based on the theory of multi-loop, the mathematical model of doubly-fed induction generator is established when the stator winding inter-turn short circuit fault and rotor winding inter-turn short circuit fault occur. In the course of modeling, the selection principle of circuit and the setting method of inter-turn short circuit fault are discussed. Based on the simulation software of MATLAB, the multi-loop model of doubly-fed induction generator is programmed, and the inductance parameters of the doubly-fed induction generator are calculated. In the calculation process, the effects of harmonics, slot leakage and end leakage are considered. The change of electromagnetic characteristics after inter-turn short circuit of stator windings of doubly-fed machine is studied. The harmonic components in rotor current are summarized. The simulation results are in agreement with the theoretical analysis. In addition, the variation of stator current phase angle and amplitude is summarized. The variation of electromagnetic characteristics after inter-turn short circuit of rotor windings is studied. The current of a stator branch current line current and harmonic content in the circulation between parallel branches are summarized. Through the analysis of fault mechanism and fault characteristics of doubly-fed induction generator winding, it can provide valuable theoretical basis for early diagnosis and condition monitoring of windings fault of doubly-fed induction generator.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM31
本文编号：2252724
[Abstract]:As a common fault of doubly-fed induction generator, winding inter-turn short circuit is harmful to generator and wind power system. Therefore, the study of inter-turn short-circuit fault in windings of doubly-fed induction generator is of great significance to protect the safe operation of wind turbine and improve the operational efficiency of wind power system. Based on the theory of multi-loop, the mathematical model of doubly-fed induction generator is established when the stator winding inter-turn short circuit fault and rotor winding inter-turn short circuit fault occur. In the course of modeling, the selection principle of circuit and the setting method of inter-turn short circuit fault are discussed. Based on the simulation software of MATLAB, the multi-loop model of doubly-fed induction generator is programmed, and the inductance parameters of the doubly-fed induction generator are calculated. In the calculation process, the effects of harmonics, slot leakage and end leakage are considered. The change of electromagnetic characteristics after inter-turn short circuit of stator windings of doubly-fed machine is studied. The harmonic components in rotor current are summarized. The simulation results are in agreement with the theoretical analysis. In addition, the variation of stator current phase angle and amplitude is summarized. The variation of electromagnetic characteristics after inter-turn short circuit of rotor windings is studied. The current of a stator branch current line current and harmonic content in the circulation between parallel branches are summarized. Through the analysis of fault mechanism and fault characteristics of doubly-fed induction generator winding, it can provide valuable theoretical basis for early diagnosis and condition monitoring of windings fault of doubly-fed induction generator.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM31
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