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A coupled electromagnetic transformer model for the analysis of winding inter-turn short-circuits

A coupled electromagnetic transformer model for the analysis of winding inter-turn short-circuits

... overtaken the electric- ity supply industry during the closing decade of the 20th century have created a powerful new commercial ...items of power generation plants and power transmis- ... See full document

7

Detection of trasformer intermittent winding faults by the on-load exciting current Park`s vector approach

Detection of trasformer intermittent winding faults by the on-load exciting current Park`s vector approach

... presents the application of the on-load exciting current Park's Vector Approach for diagnosing the occurrence of intermittent inter-turn short-circuits in ... See full document

11

A permeance-based transformer model and its application to winding interturn arcing fault studies

A permeance-based transformer model and its application to winding interturn arcing fault studies

... investigates the behavior of power transformers under the occurrence of permanent or intermittent winding insulation ...For the study of these phenomena, a simple and ... See full document

10

Power transformers behavior under the occurrence of inrush currents and turn-to-turn winding insulation faults

Power transformers behavior under the occurrence of inrush currents and turn-to-turn winding insulation faults

... study of winding inter-turn short- -circuits occurrence presents some inherent difficulties: the current in the shorted turns must be limited to the rated ... See full document

8

Incipient turn-to-turn winding fault diagnosis of power transformers by the on-load exciting current Extended Park`s Vector Approach

Incipient turn-to-turn winding fault diagnosis of power transformers by the on-load exciting current Extended Park`s Vector Approach

... study of winding inter-turn short-circuits occurrence presents some inherent difficulties: the current in the shorted turns must be limited to the rated ... See full document

7

Parameters determination for the coupled electromagnetic transformer model, with particular reference to winding faults studies

Parameters determination for the coupled electromagnetic transformer model, with particular reference to winding faults studies

... In the past few years, a considerable research effort has been devoted to the devel- opment of transformer digital models in order to simulate its behaviour under tran- sient and abnormal ... See full document

7

On-line diagnostics of transformer winding insulation failures, by Park's Vector Approach

On-line diagnostics of transformer winding insulation failures, by Park's Vector Approach

... For the same load conditions and transformer winding connections mentioned above, ...presents the experimental primary-side phase current Park's Vector patterns, for several percentages ... See full document

7

The Impact of the Expansion of the Bolsa Familia Program on the Time Allocation of Youths And Their Parents Lia Chitolina Miguel Nathan Foguel Naercio Menezes-Filho

The Impact of the Expansion of the Bolsa Familia Program on the Time Allocation of Youths And Their Parents Lia Chitolina Miguel Nathan Foguel Naercio Menezes-Filho

... shows the results of estimating equation (3) to obtain the effect of the introduction of BVJ on school ...that the estimated effect of the interaction ... See full document

39

Impact of large scale PV deployment in the sizing of urban distribution transformers

Impact of large scale PV deployment in the sizing of urban distribution transformers

... Nonetheless, the potential of distributed generation might represent a means of supplementing network capacity, therefore postponement of substantial investment on expansions or up- grades ... See full document

10

Development of a Fully Coupled Approach for Evaluation of Wellbore Stability in Hydrocarbon Reservoirs

Development of a Fully Coupled Approach for Evaluation of Wellbore Stability in Hydrocarbon Reservoirs

... adoption of a fully coupled approach allows porous flow, temperature development and rock deformation calculations to be performed ...together. The method is also called implicit coupling since ... See full document

10

A Method To Find The Area Of Sector Without The Usage Of Angle Made By The Chord

A Method To Find The Area Of Sector Without The Usage Of Angle Made By The Chord

... then the theorem is ...Thus the equation of circle is x²+y²=r².The equation of the chord at ‘a’ distance from center is ax-ry- ar=0 or Y= ... See full document

2

Synchronization Phenomena in Coupled Colpitts Circuits

Synchronization Phenomena in Coupled Colpitts Circuits

... work, the case of coupling (bidirectional and unidirectional) between two identical nonlinear chaotic circuits via a linear resistor, is ...studied. The produced dynamical systems have ... See full document

10

SOCIAL ECONOMY – A FORM OF INCLUSION AND OF ''REACTIVATING'' OF LABOR IN THE CONTEXT OF THE CURRENT CRISIS

SOCIAL ECONOMY – A FORM OF INCLUSION AND OF ''REACTIVATING'' OF LABOR IN THE CONTEXT OF THE CURRENT CRISIS

... )n the context of the cohesion policy, solidarity must represent a support for development ...on the capacity and the training of the people to whom the support ... See full document

13

Some methods for sensitivity analysis of systems / networks

Some methods for sensitivity analysis of systems / networks

... find the most important nodes, links, or other parameters to determine network structure or performance is of ...Sensitivity analysis is originated from systems science. It explores the ... See full document

8

The Current State of Neoadjuvant Chemotherapy for Muscle-Invasive Bladder Cancer

The Current State of Neoadjuvant Chemotherapy for Muscle-Invasive Bladder Cancer

... in the use of NAC for the treatment of patients with ...MIBC. The most recent and largest study was published by the International Collaboration of Trialists, and included ... See full document

6

Braz. J. Phys.  vol.37 número2A

Braz. J. Phys. vol.37 número2A

... Also the factor 2/3 in equation ...). The first term inside the first brackets of equation (23) should be ...γ´/2γ. The exponent of r in the expression in the ... See full document

5

Bank Privatization and Market Structure of the Banking Industry: Evidence from a Dynamic Structural Model

Bank Privatization and Market Structure of the Banking Industry: Evidence from a Dynamic Structural Model

... to the empirical industrial organization literature that studies the estimation of dynamic games - see Aguirregabiria and Nevo (2010), Ba- jari, Hong and Nekipelov (2010) and Pesendorfer (2010) for a ... See full document

37

A PLEA FOR THE SOCIAL STORE

A PLEA FOR THE SOCIAL STORE

... [r] ... See full document

3

Application of SWAT model for assessing effect on main functions of watershed ecosystem in Headwater, Thailand

Application of SWAT model for assessing effect on main functions of watershed ecosystem in Headwater, Thailand

... using the standard split sample calibration–validation procedure (Klemeš, ...1986). The period from January 1 st , 2008 to December 31 st , 2008 served as the warm up period for the ... See full document

13

Prostate Cancer: A State of The Heart

Prostate Cancer: A State of The Heart

... with the case of a 57-year-old male diagnosed with a 4 + 3 bilateral extended prostate ...cancer. The patient displayed some CV risk factors, including diabetes and ...staging, the patient ... See full document

6

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