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Poznan, Poland

Paplicki P.,University Of Szczecin | Szadkowski S.,ENEA Operator | Cierzniewski P.,University Of Szczecin | Wardach M.,University Of Szczecin
Przeglad Elektrotechniczny | Year: 2013

The paper presents technical and economic aspects of the selection HV-LV transformer station on the example of the expansion of a manufacturing plant. The basis of the analysis accounted for substation projects in two variants technically equivalent. The economic analysis was based on efficiency calculations of investment and included, in addition to capital expenditure, including annual cost of power losses and cost of energy. © 2013 Wydawnictwo SIGMA - N O T Sp. z o.o. All rights reserved. Source

The article presents the possibility of using artificial neural network for interpretation of dissolved gas in oil analysis results (DGA method), which is one of the common used methods for diagnostics of power transformer state evaluation. In the work, the network topology, regarding to different methods of oil-paper insulation defect classification (e.g. IEC, Duval's, Dornenburg's, Roger's method), was designed and different type of network were tested. After the selection of the most optimal neural network, a functional computer application was created. Source

Andruszkiewicz J.,Poznan University of Technology | Lorenc J.,Poznan University of Technology | Borowiak W.,ENEA Operator | Michalski A.,ENEA
International Conference on the European Energy Market, EEM | Year: 2015

In this paper the effectiveness of demand-side management using zonal tariffs for households is analysed on the case of tariff offer proposed to customers in north-western Poland with the aim to widen the use of electricity for heating purposes. The price elasticity of customers settled according to two zonal tariff was determined using standard load profile of customers published by regional distribution network operator. The costs associated with the applied mean of demand side control were identified and the tariff effects assessment were made taking into account the benefits reached by energy supplier and network operators forming together the considered tariff offer. The analysis presented enabled to formulate some recommendations concerning TOU residential tariff restructuring to improve its feasibility and to create possible prospective income in result of peak load reduction. © 2015 IEEE. Source

The paper refers to the analysis of load curves for individual electricity consumers settled according to the G-tariff as well as to the standard profiles being developed for such a consumers group. Results of analysis of influence of the sunset hour and air temperature on the shape and parameters of electrical load for selected consumer groups have been presented. The models of the influence mentioned above on the consumers with load strongly related to those parameters have been developed. The results obtained have been compared to those from another analysis for standard profiles developed by Polish Association for Electrical Energy Transfer and Distribution; the remarks on construction of standard models and their application to the load estimation for defined consumer groups have been expressed. Source

A method of electrical Power systems Court circuits calculation is proposed in this paper. To analyze the chosen power transformer sstation we have adopted the admittance matrice method at the nods of the network. Source

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