Calculation of electrical parameters for transient overvoltage studies on electrical machines

Venegas, V.; Escarela, R.; Mota, R.; Melgoza, E.; Guardado, J.L.

doi:10.1109/iemdc.2003.1210722

Cited by 7 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the low voltage rise time of the semiconductors, an uneven voltage distribution along the stator winding occurs, which can lead to voltage peaks between the conductors of the winding [3]. The insulation of the electrical machine can be heavily stressed by the voltage peaks and in the worst case, an insulation fault occurs [4]. In order to properly design the insulation, the voltage distribution along the winding must be known.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analytical determination of the turn-to-turn capacitances for the prediction of voltage peaks in a PWM-fed motor winding

Stockbrügger

Ponick

2020

Electr Eng

View full text Add to dashboard Cite

The number of inverter-fed motors is increasing due to the good controllability of the motor and the meanwhile low acquisition costs. The steep voltage slopes of the converters lead to an uneven voltage distribution along the winding and thus to voltage peaks between the conductors, which stresses the insulation. The voltage distribution can be predicted by means of equivalent circuit diagrams, which take into account the capacitive coupling between the conductors. This paper presents a novel approach for an analytical determination of the turn-to-turn capacitances, which, in addition to the geometry and the placement of the conductors, considers the influence of materials with different permittivities. The conductors are simulated by means of line charges discretely placed inside the electrodes and receptor points attached to the conductor surfaces. The capacitances are determined by means of the Maxwell capacitance matrix. The method is validated by means of FEM simulations for different geometries and materials.

show abstract

Section: Introductionmentioning

confidence: 99%

“…It can be predicted with the help of detailed equivalent electrical networks, which take into account not only the conductor inductances and resistances but also the capacitive coupling between the conductors [2,[5][6][7][8][9]. The capacitances between conductors are usually determined by means of FEM software [2,4,5,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Analytical determination of the turn-to-turn capacitances for the prediction of voltage peaks in a PWM-fed motor winding

Stockbrügger

Ponick

2020

Electr Eng

View full text Add to dashboard Cite

show abstract

“…Having the quantities of transfer functions and pulse supposition for the partial discharge current using relations (12) and (13) we can obtain the current amounts in the beginning and in the end of the coil for various quantities of injection locations of partial discharge pulse where there are selected points for the injection of partial discharge pulse. To study the model, the partial discharge pulse similar to the data obtained from lab measurements was injected into the turns of 6 and 24 (K=6,24) of the simulated winding and the signal of the winding head which was a response to the PD pulse was measured.…”

Section: Study Of the Model Validitymentioning

confidence: 99%

Transformer Winding Modeling based on Multi-Conductor Transmission Line Model for Partial Discharge Study

Hosseini¹,

Baravati²

2014

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

-To study and locate partial discharge(PD) and analyze the transient state of power transformer, there is a need for a high frequency model of transformer winding and calculation of its parameters. Due to the high frequency nature of partial discharge phenomenon, there is a need for an accurate model for this frequency range. To attain this goal, a Multi-Conductor Transmission Line (MTL) model is used in this paper for modeling this transformer winding. In order that the MTL model can properly simulate the transformer behavior within a frequency range it is required that its parameters be accurately calculated. In this paper, all the basic parameters of this model are calculated by the use of Finite Element Method (FEM) for a 20kV winding of a distribution transformer. The comparison of the results obtained from this model with the obtained shape of the waves by the application of PD pulse to the winding in laboratory environment shows the validity and accuracy of this model.

show abstract

“…The analytical method is very limited because the formulas are from experience or related to special windings with a simple geometry. The field method may be more applicable for complex transformer windings, but for a large nconductor system, it is considerably time consuming [11,12]. Another problem is how to simulation the iron core's magnetic characteristic in high frequency.…”

Section: Introductionmentioning

confidence: 99%

Calculation of Electrical Parameters for Studies on Propagation Characteristic of PD along Transformer Winding

Zhang

Ruan²,

Zhao

et al. 2008

2008 International Conference on Computer and Electrical Engineering

View full text Add to dashboard Cite

In order to investigate the propagation of partial discharge pulses in transformer winding, the simulation model of a 180 turns continuous disc type transformer winding based on multi-conductor transmission line (MTL) theory is constructed. According to the symmetry of windings, a 2D equivalent finite element model is set up under ANSYS environment. A modified method is proposed to calculate the K matrix that decrease distinctly calculation cost without loss of accuracy. For the evaluation of L and R parameter of transformer with iron core in MHz frequency area, the skin effect of conductors and iron area is taken into consideration. The frequency-dependent parameters are calculated first by time harmonic magnetic field analysis. The proposed methods of calculating parameters are helpful to research on propagation characteristic of partial discharge (PD) pulses in electric equipments.

show abstract

Calculation of electrical parameters for transient overvoltage studies on electrical machines

Cited by 7 publications

References 12 publications

Analytical determination of the turn-to-turn capacitances for the prediction of voltage peaks in a PWM-fed motor winding

Analytical determination of the turn-to-turn capacitances for the prediction of voltage peaks in a PWM-fed motor winding

Transformer Winding Modeling based on Multi-Conductor Transmission Line Model for Partial Discharge Study

Calculation of Electrical Parameters for Studies on Propagation Characteristic of PD along Transformer Winding

Contact Info

Product

Resources

About