Improved Transient Simulation of Salient-Pole Synchronous Generators With Internal and Ground Faults in the Stator Winding

Bi, Dongxue; Xiangheng, Wang; Wang, Weijian; Zhu, Z. Q.; Howe, D.

doi:10.1109/tec.2004.841509

Cited by 43 publications

(13 citation statements)

References 13 publications

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“…The modeling methods of machine with WSF can be divided into multiloop method (MLM), finite element method (FEM), winding function method (WFT) and winding partition method (WPM). The basic principle of MLM is to build equations for the voltages and flux linkages according to the actual circuit loops of the motor, where the winding disposition can be considered [10]- [12]. However, different faults require various circuit loop creations, which is a complicated process.…”

Section: Introductionmentioning

confidence: 99%

A Physical Faulty Model Based on Coil Sub-Element for Direct-Drive Permanent Magnet Synchronous Motor With Stator Winding Short-Circuit Faults

Gao

et al. 2019

IEEE Access

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As winding short-circuit faults (WSF) in a direct-drive permanent magnet synchronous motor (DDPMSM) degrade its reliability and may cause serious catastrophes, fault detection and diagnosis for the DDPMSM are necessary. The performances analyses of motor under WSF are the basis of fault detection and diagnosis. An efficient and accurate faulty model is a great tool for evaluating motor performances under various WSF. Hence, this paper proposes a novel physical faulty model (PFM) based on the coil sub-element for the DDPMSM with the WSF. Fault position can be examined by differentiating the inductance and the electromotive force of the coil sub-element. This model can evaluate motor performances under various WSF, especially inter-turn short-circuit fault in different positions of the same slot, without changing the internal structure of model. The faults are set by connecting the desired taps as in the practical motor. First, the structure and parameters of the DDPMSM are reported. Second, the inductance calculation matrix, which considers the spatial position of the fault, is constructed. Then, the proposed PFM is established. The motor performances under various WSF are evaluated. Finally, the results of PFM, finite element model and experiment are compared. The results validate the correctness of the proposed PFM. INDEX TERMS Coil sub-element, direct-drive permanent magnet synchronous motor, inductance calculation matrix, physical faulty model, winding short-circuit fault.

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Section: Introductionmentioning

confidence: 99%

A Physical Faulty Model Based on Coil Sub-Element for Direct-Drive Permanent Magnet Synchronous Motor With Stator Winding Short-Circuit Faults

Gao

et al. 2019

IEEE Access

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“…In recent years, numerous methods reported in the literature on the inductance identification can be divided into four categories: the multi-loop method (MLM), the equivalent magnetic network method (EMNM), the winding function method (WFM), and the finite element method (FEM). The basic principle of MLM is to build equations for the voltages and flux linkages according to the actual circuit loops of the motor, where the winding disposition can be considered [6]. However, the circuit loop distributions are different under different fault conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Sci. 2019, 9, x FOR PEER REVIEW 2 of 13 actual circuit loops of the motor, where the winding disposition can be considered [6]. However, the circuit loop distributions are different under different fault conditions.…”

mentioning

confidence: 99%

A Novel Analytical Method of Inductance Identification for Direct Drive PMSM with a Stator Winding Fault Considering Spatial Position of the Shorted Turns

Gao

et al. 2019

Applied Sciences

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This paper presents a novel analytical method (NAM) of inductance identification for a direct drive permanent magnet synchronous motor (DDPMSM) with a stator winding fault (SWF), which considers the spatial position of the shorted turns. First, the structure of the DDPMSM is introduced and its key parameters are reported. Second, the NAM on the inductance identification is elaborated. The inductance analytical expressions of the faulty coil are derived in detail, in which the inductances of the faulty coil and the fault branch can be quickly calculated according to the spatial position coordinates of fault turns. Then, the model of DDPMSM with SWF is established. Finally, using the NAM, finite-element method (FEM), and the simplified analytical method (SAM), the inductances of the faulty coil and the branch are calculated under different fault conditions. Additionally, the fault current of the faulty coil is also studied, where the value of the fault current reflects the fault severity. The comparisons among the FEM, NAM, and SAM show that the accuracy of the NAM is higher than that of the SAM. stator winding faults need be established by the MLM, which is not universal. Based on the principle of the equivalent flux tube, the complex magnetic field in the motor is converted into an impedance network by the EMNM [7]. Then, the corresponding inductance parameters are obtained by calculating the equivalent permeability and flux of each circuit. This method can reflect the essence of the motor, but its calculation process is tedious [8]. The WFM provides an effective method to estimate inductance from windings and air gap data, in which the magnetomotive force and gap permeability of the motor are determined by the winding structure [9,10]. However, WFT is suitable for a motor with small air gap width. It is difficult to provide accurate results for a motor with a large air-gap width, for example, the DDPMSM. All the methods mentioned above have the same shortcoming in that they cannot evaluate motor performances under the inter-turn short circuit fault (ITSCF) in different positions of the same slot. The FEM considers the influence of spatial harmonics, winding configurations, core saturation, and so on, which can accurately calculate the inductance of the motor in any fault condition. However, this method needs to perform a new simulation for every fault configuration and requires too much CPU time [11,12]. In addition, it is also not very appropriate for parametric studies. Therefore, a novel analytical method (NAM) of inductance identification is proposed herein, which considers the spatial position of shorted turns in the stator winding fault (SWF).The remainder of the paper is organized as follows: The structure and some main parameters are introduced in the Section 2. In Section 3, the inductance analytical expressions of the faulty coil are derived in detail, in which the spatial position of the shorted turns in the ITSCF is considered. Then, the model of the DDPMSM with SWF is established in Section 4. In th...

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“…Alternatively in [9][10][11], the synchronous machine is assumed to be formed from several electric loops and the inductances are calculated on a coil-by-coil basis. The capacitive effect in modeling of the faulted machine is also considered in [12] and mutual inductance of faulted machine was precisely calculated by use of winding function approach in [13].…”

Section: Introductionmentioning

confidence: 99%

A Faulty Synchronous Machine Model for Efficient Interface with Power System

Koochaki¹

2015

Journal of Electrical Engineering and Technology

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-This paper presents a new approach for simulating the internal faults of synchronous machines using distributed computing and Large Change Sensitivity (LCS) analysis. LCS analysis caters for a parallel solution of 3-phase model of a faulted machine within the symmetrical componentbased model of interconnected network. The proposed method considers dynamic behavior of the faulty machine and connected system and tries to accurately solve the synchronous machine's internal fault conditions in the system. The proposed method is implemented in stand-alone FORTRAN-based phasor software and the results have been compared with available recordings from real networks and precisely simulated faults by use of the ATP/EMTP as a time domain software package. An encouraging correlation between the simulation results using proposed method, ATP simulation and measurements was observed and reported. The simplified approach also enables engineers to quickly investigate their particular cases with a reasonable precision.

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Improved Transient Simulation of Salient-Pole Synchronous Generators With Internal and Ground Faults in the Stator Winding

Cited by 43 publications

References 13 publications

A Physical Faulty Model Based on Coil Sub-Element for Direct-Drive Permanent Magnet Synchronous Motor With Stator Winding Short-Circuit Faults

A Physical Faulty Model Based on Coil Sub-Element for Direct-Drive Permanent Magnet Synchronous Motor With Stator Winding Short-Circuit Faults

A Novel Analytical Method of Inductance Identification for Direct Drive PMSM with a Stator Winding Fault Considering Spatial Position of the Shorted Turns

A Faulty Synchronous Machine Model for Efficient Interface with Power System

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