Anti-Interference and Location Performance for Turn-to-Turn Short Circuit Detection in Turbo-Generator Rotor Windings

Wu, Yucai; Ma, Guanhua

doi:10.3390/en12071378

Cited by 4 publications

(5 citation statements)

References 11 publications

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“…Further, an imbalance between the phase current and impedance occurs due to the rotor eccentricity. By measuring the phase current, impedance, and sensor, the type of rotor eccentricity can be distinguished by using the deviation of the amplitude [23][24][25][26][27][28]. Next, a control technique is used to solve the unstable motor performance caused by rotor eccentricity with various diagnostic methods [29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Diagnosis and Robust Design Optimization of SPMSM Considering Back EMF and Cogging Torque due to Static Eccentricity

Park

Kim

et al. 2021

Energies

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Static eccentricity (SE) is frequently generated by manufacturing processes. As the nonuniformity of the air-gap length is caused by the SE, the torque ripple and cogging torque increase in the motor. This study analyzes the distorted back electromotive force (EMF) and cogging torque due to SE. Further, a motor design considering SE is performed for stable back EMF and low cogging torque. First, the SE was diagnosed and analyzed using the back EMF and cogging torque measured from the test results of the base model. In addition, the rotor position was calculated using the unbalanced back EMF due to the SE. The calculated rotor position is used when analyzing phenomena due to SE and applied to robust design. Subsequently, robust design optimization was performed to improve the unbalanced back EMF and cogging torque due to SE. Using finite element analysis (FEA) considering SE, the shape of the stator was designed based on the base model. The estimated rotor position from the base model was applied to the optimum model to confirm its robustness from SE’s effects. Finally, the base and optimum models were compared through the test results.

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Section: Introductionmentioning

confidence: 99%

Diagnosis and Robust Design Optimization of SPMSM Considering Back EMF and Cogging Torque due to Static Eccentricity

Park

Kim

et al. 2021

Energies

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“…Currently, diagnosis methods for this fault are generally based on electrical and/or mechanical parameters, such as the stator voltage [5]- [6], stator current [7]- [14], rotor current [15], circulating current inside the parallel branch loop [9], [16], unbalanced magnetic pull [17]- [18], electromagnetic power [19], mechanical vibrations [20], electromagnetic torques [16], etc.…”

Section: Introductionmentioning

confidence: 99%

A Novel Universal Model Considering SAGE for MFD-Based Faulty Property Analysis Under RISC in Synchronous Generators

Wang

Jiang

et al. 2022

IEEE Trans. Ind. Electron.

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This paper proposes a new rotor interturn short circuit (RISC) fault analysis model for the electromechanical property study in synchronous generators. The specific novelty of this model lies in two aspects: 1) It considers that most generators exist static air-gap eccentricity (SAGE), so it analyzes the RISC fault under normal and SAGE, making the model more versatile, and 2) it takes into account not only the short circuit degree but also the short circuit position, consequently it is more universal. By feeding the number of short circuit turns (denotes the short circuit degree), the angle between the two slots where the short circuit takes place (denotes the short circuit position) and the detailed parameters of the generator into the model, the developing tendency of the key magnetic flux density MFD-based parameters can be conveniently predicted. The advantages of the proposed model primarily lie in the universality and the calculation speed. It can quickly evaluate the generator operating conditions. The phase current and the electromagnetic torque (EMT) are selected in this paper as the representatives of the electrical parameter and the mechanical parameter, respectively. 2D finite element analysis (FEA) and experimental studies validate the proposed model.

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“…The major internal and external failures and their protections are comprehensively presented in [11][12][13][14]. The main issue arises in the protection of windings T2TFs [15,16]. In [9], the authors presented a novel way to detect and protect T2TF in the control windings (CtrW) of the MCSR.…”

Section: Introductionmentioning

confidence: 99%

Modelling and Design of a Low-Level Turn-to-Turn Fault Protection Scheme for Extra-High Voltage Magnetically Controlled Shunt Reactor

Khan

Zheng

2019

Energies

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The objective of this paper is to model and design a low-level turn-to-turn fault (T2TF) protection scheme for a magnetically controlled shunt reactor (MCSR), during incipient stage under 10% to 100% operating capacity. Due to the structural and functional differences of all the three windings in extra-high voltage (EHV) MCSR, a separate mechanism of detecting a T2TF in each winding is necessary. For this purpose, a detailed mathematical and structural analysis of the model is performed, and a comprehensive protection scheme based on the internal changes in magnetic and electric parameters of the windings is formulated to detect 3% T2TF in power windings (PWs), control windings (CtrWs), compensation windings (CpWs), and to differentiate it from other abnormalities. The main idea of the scheme is to perform the currents magnitude comparison of respective winding with the predefined settings values and decide necessary action. The proposed scheme is also capable of identifying the faulty winding along with faulty phase. The scheme is tested under different operating capacities (10%, 50%, 100%), and other types of unusual conditions, i.e., direct energization, pre-excited energization, power regulation, internal and external faults. The results demonstrate the effectiveness of the proposed scheme. The work of this paper is applicable in the areas of power system transmission and power system protection. The simulations are carried out on MATLAB/Simulink-based models.

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Anti-Interference and Location Performance for Turn-to-Turn Short Circuit Detection in Turbo-Generator Rotor Windings

Cited by 4 publications

References 11 publications

Diagnosis and Robust Design Optimization of SPMSM Considering Back EMF and Cogging Torque due to Static Eccentricity

Diagnosis and Robust Design Optimization of SPMSM Considering Back EMF and Cogging Torque due to Static Eccentricity

A Novel Universal Model Considering SAGE for MFD-Based Faulty Property Analysis Under RISC in Synchronous Generators

Modelling and Design of a Low-Level Turn-to-Turn Fault Protection Scheme for Extra-High Voltage Magnetically Controlled Shunt Reactor

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