Reduction of Induced Shaft Voltage and Bearing Current in Turbo Generators: Modeling, Compensation, and Practical Test

Golkhandan, Reza Kazemi; Torkaman, Hossein

doi:10.1109/tie.2020.2985006

Cited by 11 publications

(12 citation statements)

References 32 publications

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“…Moreover, as the SISC degree increases, the amplitudes of first, third, and fifth harmonics will all be increased. This is consistent with the qualitative conclusion based on (11).…”

Section: Shaft Voltage Resultssupporting

confidence: 92%

“…As indicated in (11), there is no shaft voltage under the normal condition, while under the SISC condition, the shaft voltage is produced, with first, third and fifth harmonics.…”

Section: Shaft Voltage Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, Chen summarised the research status and the prevention measures of the shaft voltage [10]. Generally, the weakening and the prevention of the shaft voltage can be summarised as follows [11, 12]: Grounding of the gas measuring shaft. Bearing pedestal insulation. Carbon brush is installed on the shaft. …”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Impact of stator interturn short circuit fault on shaft voltage in a synchronous generator

Yang

Sun

et al. 2022

IET Electric Power Appl

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Shaft voltage often exists in synchronous generators due to the assembly error or various faults after the long‐term performance. The article investigates the shaft voltage characteristic under the stator interturn short circuit (SISC) condition. Different from other studies, this article mainly considers the mapping relationship between the amplitude–frequency characteristics of the shaft voltage and the SISC degrees. The detailed shaft voltage expressions are first derived based on the magnetic flux density under the normal condition and SISC condition. Then the finite element analysis and the experiment is studied on a CS‐5 prototype synchronous generator with two poles in order to validate the theoretical formula. The result shows that there is no shaft voltage in the normal condition, while the shaft voltage is generated obviously under the SISC condition. Meanwhile, the frequency component of the shaft voltage is mainly composed of odd harmonics including the first, third and fifth harmonics.

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“…Moreover, as the SISC degree increases, the amplitudes of first, third, and fifth harmonics will all be increased. This is consistent with the qualitative conclusion based on (11).…”

Section: Shaft Voltage Resultssupporting

confidence: 92%

“…As indicated in (11), there is no shaft voltage under the normal condition, while under the SISC condition, the shaft voltage is produced, with first, third and fifth harmonics.…”

Section: Shaft Voltage Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of stator interturn short circuit fault on shaft voltage in a synchronous generator

Yang

Sun

et al. 2022

IET Electric Power Appl

View full text Add to dashboard Cite

show abstract

“…However, more research has been carried out on the rationality of turbine power generation systems [8], [9], [10], and less on the structure of the generator body. In reality, nevertheless, the harsh operating environment of the turbocharger places high demands on the generator.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Topology and Electromagnetic Characteristics of Novel Stator Partitioned Axial Flux Disk Generator for Vehicles

Shi

Liu

et al. 2023

IEEE Access

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Internal combustion engines emit high-temperature, high-pressure, and high-speed exhaust gases, resulting in wasted energy and low thermal efficiency. In order to recover the available residual energy in the exhaust gas, this paper proposes a new topology of the disk-type axial flux stator-excited doubly salient generator (AFSDSG) with partitioned stator suitable for high-temperature and high-speed operation. Based on the analysis of the above generator inductance characteristics, the influence mechanism of three pole-slot structures on the induced electromotive force (IEMF) of the armature winding is clarified, the equivalent magnetic circuit method is used to analyze the influence of different winding arrangements on the no-load performance of the generator, and the principles of pole-slot structure optimization and winding arrangement are summarized. The finite element software is used to model and simulate different configuration. After focusing on the analysis of transient characteristics such as inductance, armature winding IEMF, and air-gap flux, it is concluded that different from the conventional pole-slot structure and winding connection method make that only the overlapping area of the stator and the rotor changes linearly can produce a constant voltage, the winding arrangement of Winding Partition Excitation Span 2 has a high IEMF amplitude value and low harmonic content. Finally, the prototype of a three-phase 12/8-pole was trial manufactured and tested. The consistency of the simulation results and experimental results is verified the innovation and feasibility of the new topology proposed in this paper.

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A comprehensive study on electromagnetic torque and rotor UMP based on an improved 3D static air-gap eccentricity model

Xu,

He,

Zhang

et al. 2024

Alexandria Engineering Journal

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Reduction of Induced Shaft Voltage and Bearing Current in Turbo Generators: Modeling, Compensation, and Practical Test

Cited by 11 publications

References 32 publications

Impact of stator interturn short circuit fault on shaft voltage in a synchronous generator

Impact of stator interturn short circuit fault on shaft voltage in a synchronous generator

Analysis of the Topology and Electromagnetic Characteristics of Novel Stator Partitioned Axial Flux Disk Generator for Vehicles

A comprehensive study on electromagnetic torque and rotor UMP based on an improved 3D static air-gap eccentricity model

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