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首页> 外文期刊>International journal of numerical modelling >Modeling and stator Inter-Turn short circuit fault detection for saturable salient pole synchronous machine by a non-linear magnetic equivalent circuit approach
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Modeling and stator Inter-Turn short circuit fault detection for saturable salient pole synchronous machine by a non-linear magnetic equivalent circuit approach

机译：饱和凸极同步电机的非线性磁等效电路建模与定子匝间短路故障检测

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摘要

This paper presents a novel and adequate model for healthy and faulty salient pole synchronous machines with and without interturn short circuit fault. The model is presented for a machine with arbitrary pole numbers, arbitrary damper bars, and stator slot numbers. The magnetic equivalent circuit with nonlinear elements is used for modeling, and numerical techniques based on Newton-Raphson method have been approved for solving of nonlinear equations. Because the design of electric machines is based on the knee point of a B-H curve, consideration of saturation effect is mandatory for adequate studying. Because of the saturation effect, there are some nonlinear algebraic magnetic equations, which should be solved simultaneously with differential equations. Trapezoidal technique is used for differential equations converting to algebraic type, and Newton-Raphson method is used for a nonlinear set equation solving. Stator current signature analysis is used for stator interturn short circuit fault detection. Finally, obtained results by finite element method are used to verify the effectiveness of the proposed modeling method. The proposed approach for magnetic equations based on nodal potential and reluctance mesh model equations is one of the paper novelties for the salient pole synchronous machine modeling in both healthy and faulty cases. This dynamic modeling method has less complexity compared to finite element method and pure nodal potential approaches. Solving the electric and magnetic equations by a single set of equations is the main advantage of the presented method, which has been addressed for a salient pole synchronous machine for the first time. Another advantage of the proposed study is the capability of modeling the healthy and faulty machine with interturn fault by a single model.
机译：本文提出了一种适用于有故障和无匝间短路故障的凸极同步发电机的健康和故障模型。给出的模型适用于具有任意极数，任意阻尼杆和定子槽数的电机。带有非线性元件的磁等效电路用于建模，基于牛顿-拉夫森法的数值技术已被批准用于求解非线性方程。由于电机的设计基于B-H曲线的拐点，因此必须充分考虑饱和效应。由于饱和效应，存在一些非线性代数磁方程，应与微分方程同时求解。梯形技术用于将微分方程转换为代数类型，牛顿-拉夫森方法用于非线性集合方程的求解。定子电流信号分析用于定子匝间短路故障检测。最后，通过有限元方法获得的结果用于验证所提建模方法的有效性。提出的基于节点势和磁阻网格模型方程的磁方程方法是在健康和故障情况下凸极同步电机建模的论文之一。与有限元方法和纯节点势方法相比，这种动态建模方法的复杂度较低。通过单个方程组求解电磁方程是该方法的主要优点，这是凸极同步电机首次解决的问题。提出的研究的另一个优势是能够通过单个模型对带有匝间故障的故障机器进行建模。

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