Diagnosis of Eccentric Rotor in Synchronous Machines by Analysis of Split-Phase Currents—Part II: Experimental Analysis

Bruzzese, C.

doi:10.1109/tie.2013.2284554

Cited by 41 publications

(35 citation statements)

References 41 publications

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“…It is also indicated that the very place which has the largest MPPUA is generally in accordance with the position where the radial air-gap length is the minimum. This is caused due to the max permeance in this position; see (1) and Figure 1(b).…”

Section: Object and Methodmentioning

confidence: 96%

“…When the eccentricity degree is more than 10%, severe vibrations, stator core deformations, and even winding damage will be caused [1]. When RISC fault develops progressively, serious consequences, such as field current increment, reactive power output decrease, and bearing vibration aggravation, will be produced.…”

Section: Introductionmentioning

confidence: 99%

“…Achievements obtained for SAGE mainly focus on the three-phase current or voltage change [3][4][5][6], the circulating current inside parallel branches (CCPB) and its corresponding diagnosis method [7][8][9], the unbalanced magnetic pull (UMP) calculation via FEM [10,11], the winding inductance variation based on improved winding function theory [12], and so forth.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stator Vibration Characteristic Identification of Turbogenerator among Single and Composite Faults Composed of Static Air-Gap Eccentricity and Rotor Interturn Short Circuit

Deng

Peng

et al. 2016

Shock and Vibration

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This paper investigates the radial stator vibration characteristics of turbogenerator under the static air-gap eccentricity (SAGE) fault, the rotor interturn short circuit (RISC) fault, and the composite faults (CFs) composed of SAGE and RISC, respectively. Firstly, the impact of the faulty types on the magnetic flux density (MFD) is analyzed, based on which the detailed expressions of the magnetic pull per unit area (MPPUA) on the stator under different performing conditions are deduced. Then, numerical FEM simulations based on Ansoft and an experimental study are carried out, taking the SDF-9 type fault simulating generator as the study object. It is shown that SAGE will increase the stator vibration at 2f (f is the electrical frequency) which already exists even in normal condition, while RISC and CF will bring in stator vibrations at f, 2f, 3f, and 4f at the same time. The vibration amplitudes under CF are larger than those under RISC. As SAGE increases, the vibration amplitudes of each harmonic component under CF will all be increased, while the development of RISC will decrease the 2nd harmonic vibration but meanwhile increase the 4th harmonic vibration. The achievements of this paper are beneficial for fault identification and condition monitoring of the turbogenerator.

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Section: Object and Methodmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stator Vibration Characteristic Identification of Turbogenerator among Single and Composite Faults Composed of Static Air-Gap Eccentricity and Rotor Interturn Short Circuit

Deng

Peng

et al. 2016

Shock and Vibration

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show abstract

“…Recent monitoring methods for this kind of fault are mainly based on the detecting of these parameters [16][17][18]. However, the rotor vibration and the stator electromotive force are affected by many factors, and different failures may cause similar rotor vibration characteristics and stator current features.…”

Section: Introductionmentioning

confidence: 99%

United Electromagnetic Characteristics and Online Monitoring Method of Static Air-gap Eccentricity of Turbo-Generator

Tang¹,

Ke²,

He³

et al. 2016

Journal of Electrical Engineering and Technology

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-The purpose of this paper is to investigate the united Electromagnetic characteristics for the effective monitoring on the static air-gap eccentricity (SAGE) of turbo-generator. Different from other studies, this paper not only studies on the unbalanced magnetic pull (UMP) and the vibration characteristics of the stator and the rotor, but also investigates the harmonic features of the magnetic flux density and the circulating current inside the parallel branches (CCPB). The theoretical calculation, together with the finite-element-method (FEM) simulation and the experiment verification, is taken for a SDF-9 type non-salient generator. It is shown that, when SAGE occurs, apparent doublefrequency UMP and vibrations will be produced both on the stator and the rotor, while the CCPB will have an obvious increment at the 1 st harmonic component. In addition, the amplitude of the magnetic flux density will be of cosine distribution in the circumferential position of the air-gap, while in normal condition it is a constant. Moreover, the pass-band amplitude, together with the 1 st harmonic of the magnetic flux density, will be enlarged as well. These united electromagnetic characteristics can be used as the diagnosis and monitoring criterion for SAGE.

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“…Novel ground fault detection methods without using voltage injection have also been proposed recently for static excited generators [26,27]. Currently, some contributions have been published related to the diagnosis of eccentric rotor in synchronous machines [28,29].…”

Section: Introductionmentioning

confidence: 99%

Field-winding fault detection in synchronous machines with static excitation through frequency response analysis

Blánquez

Platero

Rebollo

et al. 2015

International Journal of Electrical Power & Energy Systems

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a b s t r a c tFrequency Response Analysis is a well-known technique for the diagnosis of power transformers. Currently, this technique is under research for its application in rotary electrical machines. This paper presents significant results on the application of Frequency Response Analysis to fault detection in field winding of synchronous machines with static excitation. First, the influence of the rotor position on the frequency response is evaluated. Secondly, some relevant test results are shown regarding ground fault and inter-turn fault detection in field windings at standstill condition. The influence of the fault resistance value is also taken into account. This paper also studies the applicability of Frequency Response Analysis in fault detection in field windings while rotating. This represents an important feature because some defects only appear with the machine rated speed. Several laboratory test results show the applicability of this fault detection technique in field windings at full speed with no excitation current.

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Diagnosis of Eccentric Rotor in Synchronous Machines by Analysis of Split-Phase Currents—Part II: Experimental Analysis

Cited by 41 publications

References 41 publications

Stator Vibration Characteristic Identification of Turbogenerator among Single and Composite Faults Composed of Static Air-Gap Eccentricity and Rotor Interturn Short Circuit

Stator Vibration Characteristic Identification of Turbogenerator among Single and Composite Faults Composed of Static Air-Gap Eccentricity and Rotor Interturn Short Circuit

United Electromagnetic Characteristics and Online Monitoring Method of Static Air-gap Eccentricity of Turbo-Generator

Field-winding fault detection in synchronous machines with static excitation through frequency response analysis

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