A computational approach for consumers refunding analysis due to equipment damages

Abstract

This paper presents a computational strategy proposal for the analysis of refunding requests for damages. The activities involve studies and modeling of typical power distribution system, some electromagnetic disturbance phenomenon and a variety of household, commercial and industrial electro-electronic devices. Based on the discretization of the voltage and current waveforms resulting from the nonideal operating conditions, this work shows a procedure to correlate the disturbances occurred in the networks with the dielectric and thermal stresses applied to the considered devices. These indicators are sequentially confronted with the focused equipment withstand capability limits so as to verify the possibility of damages. By applying the approach to specific studies the overall method and software utilization is highlighted. The results show good consistency regarding the emission of a judgment on the subject discussed here.

Air conditioner ATP time domain model and validation focusing reimbursement requests associated with system disturbances

“…Once the model proved to be quite reliable, the ATP representation was transferred to a special software dedicated to general computational analysis of consistence of a given request of consumer refunding of equipment damage supposedly attributed to a system disturbance. This software has been denominated by APR (Reimbursement Request Analyzer) [8].…”

“…Thus, determining the equation the co-energy of circuit and using (8), it is possible to obtain (9): The next step goes towards the concatenated fluxes for both stator and rotor. In this context it must be pointed out that the total flow is a composition of the individual fluxes produced by the selected winding current and the mutual coupling with other rotor and stator windings.…”

Grounding System Modelling and Its Impact on Computational Refunding Analysis for Equipment Damages

“…These indicators are calculated by the expressions (1) and (2), which correspond respectively to voltage and current solicitation. More information about this calculation method can be found in [13].…”

“…To achieve such tool it becomes necessary to implement computational models that are appropriate to represent the power grids from any busbar until the end user and that is capable of reproducing disturbances and correctly model consumer equipments. This development has been fully described in [6]. This reference points out the final product called by APR software.…”

A proposal for Computational Refunding Analysis based on real time disturbances measurements

“…As a final product of the work carried out, it was created the computational application APR (Analyzer Request for Refunding). It allows playback the computational playback of phenomena occurring in the distribution networks, the conversion of disturbance into dielectric and thermal stresses, and the subsequent comparison with the limits for supportability of the equipment under review, providing, this way, subsidies to issue a technical opinion on the request of refunding [7,8]. This procedure consists in the recognition of the occurrence to identify its origin and its computer simulation.…”