Navegando por Assunto "Power quality"

Agora exibindo 1 - 18 de 18

Acesso aberto (Open Access)
Análise da qualidade da tensão no ponto de conexão de uma fábrica de alumínio com o sistema interligado nacional
(Universidade Federal do Pará, 2009-09-09) MANITO, Allan Rodrigo Arrifano; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
In this work, it is presented an analysis of the voltage quality at the Point of Common Coupling (PCC) of an aluminum industry plant with the national grid in order to evaluate the impact of this facility in the grid regarding the voltage fluctuation, voltage unbalance and voltage harmonic distortion. The data of the power quality disturbances cited above were collected through a measurement campaign over a period of 7 consecutive days, as requested by the National Electric System Operator (ONS) for cases of loads connected to the grid which have nonlinear characteristics, such as aluminum plants. Additionally, a computational study to determine the maximum values of voltage harmonic distortion at the PCC is presented in order to complete the analysis made by the measurement campaign. The computational programs used for the study were the HarmZs of CEPEL and Matlab 7.0.
Acesso aberto (Open Access)
Análise de impactos harmônicos em rede de média tensão utilizando redes neurais
(Universidade Federal do Pará, 2020-11-11) SOUZA, Jayne do Nascimento; LEITE, Jandecy Cabral; http://lattes.cnpq.br/7279183940171317
A methodology is presented to assess the impact caused by the generation of harmonics, located on a bus of interest in the medium voltage substation, in the electric grid of the energy concessionaire. The estimate is to carry out the construction of a model based on data collected, applying the technique of artificial neural network (ANN). The input of the neural model is built by harmonic currents, impacted by nonlinear loads that make up the system of the proposed methodology. The objective of this dissertation is to conduct a measurement campaign to collect data from the electrical system, to demonstrate a study on the quality of electrical energy, considering the recommendations of IEC 61000-3-6 (IEC / TR, 2008-02), IEEE Std. 519-2014, EN 50160-2004 and PRODIST (module 8,2017) and propose the development of an algorithm capable of evaluating measurements using the artificial neural network technique. The technique used in this project was the artificial neural network (ANN) technique, which made it possible to construct the model well with the validation of the results obtained from comparisons of the reference results via computer simulation with results obtained through the neural model. Therefore, the dissertation presented and applied in practice with case studies of the actions for analysis of harmonic impacts in electrical energy distribution systems through the construction of mathematical models using the neural network, obtaining good results, thus validating the applied technique.
Acesso aberto (Open Access)
Análise de supraharmônicos em equipamentos eletrônicos e caracterização utilizando a transformada wavelet
(Universidade Federal do Pará, 2018-09-10) RODRIGUES, Carlos Eduardo Moreira; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
Esta dissertação objetiva analisar a emissão, a propagação e a interação entre equipamentos envolvendo componentes harmônicas que possuem frequência na faixa entre 2 kHz e 150 kHz, denominadas supraharmônicos. A literatura especializada já reportou a emissão de supraharmônicos por equipamentos eletrônicos como lâmpadas fluorescentes, lâmpadas LED, inversores de frequência e nobreaks, além de impactos relacionados ao aquecimento de cabos e terminações, ruído acústico e interferência em sistemas PLC (Power Line Communication). No presente trabalho, foram realizadas campanhas de medição, em ambiente laboratorial, em inversores de frequência e um conjunto de lâmpadas LED. As medições se dividiram em dois grupos distintos: com os equipamentos conectados à rede elétrica e a uma fonte eletrônica trifásica, com o objetivo de verificar as ordens e os níveis, tanto das emissões provenientes dos equipamentos, quanto da distorção emitida pela própria fonte eletrônica, além da interação entre a fonte e os equipamentos alimentados. Foram empregadas a Transformada de Fourier e a Transformada Wavelet Packet para efetuar a análise e caracterização das distorções observadas. As medições mostraram uma contribuição significativa dos equipamentos observados e da fonte eletrônica para a emissão de supraharmônicos, além da amplificação da distorção quando os equipamentos são por ela alimentados.
Acesso aberto (Open Access)
Análise do impacto de conversores de frequência na qualidade da energia do sistema de distribuição de uma indústria de petróleo
(Universidade Federal do Pará, 2010-06-10) MAGALHÃES, Christiane Marques Sousa de; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
In this work, it is presented an analysis of the distribution system power quality of an oil industry in order to evaluate the impact of the installation of frequency converters regarding the harmonic distortion. The harmonic distortion data were collected through two measurements over a period of seven consecutive days, one performed before and other after the installation of frequency converters. Additionally, a computational study using PTW (Power Tools for Windows) is presented in order to simulate future conditions of new frequency converters installation and to analyse the influence of capacitor banks in the amplification of distribution system harmonic distortion.
Acesso aberto (Open Access)
Análise dos impactos harmônicos em uma indústria de manufatura de eletroeletrônicos utilizando árvores de decisão
(Universidade Federal do Pará, 2015-03-27) NOGUEIRA, Rildo de Mendonça; SANTANA, Ádamo Lima de; http://lattes.cnpq.br/4073088744952858; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
The Power Quality (PQ) is constantly the subject of many studies, mainly those that are related to the industrial production sector, where are concentrated large loads of the electrical systems. With the evolution of industrial production processes and the introduction of new technologies in the industrial sector, quantities of electronic equipment bars were added that are sources of disturbances in the systems, and affecting the quality of the product "electricity". In order to minimize the inconvenience resulting from low quality of energy and damage to utilities and consumers (industrial, commercial and residential), it was developed in Brazil, distribution procedures in the national grid (PRODIST), created and developed the National Electric Energy Agency (ANEEL). The PRODIST aims to regulate and standardize activities related to energy distribution, including product quality standards. This work was concentrated and held in a company of the industrial pole of Manaus (PIM), which has a three-phase electrical system low voltage, in order to monitor the quality of the product "electricity" through the harmonic content generated by the electrical network involved in manufacturing. The data generated were subjected to computational intelligence technique (HF), using the process of knowledge extraction discovery in databases or KDD. The objective is to analyze, identify and diagnose the coupling points and processes that have representative harmonic content for the system, so being able to check how much each analyzed process may be affecting the power quality within the industry itself and the point of coupling with the concessionaire, through the generations of harmonic distortion, thus avoiding penalties and other sanctions regulated.
Acesso aberto (Open Access)
Análise dos impactos harmônicos na qualidade da energia elétrica utilizando kdd – estudo de caso na Universidade Federal do Pará
(Universidade Federal do Pará, 2019-03-18) SILVA, Waterloo Ferreira da; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
The present work presents an analysis of data related to Power Quality (PQ), the increasing use of nonlinear loads, equipment based on power electronics in residential, commercial and industrial installations are contributing to the significant increase in the levels of harmonic distortion of current and, consequently, of voltage, as observed in the Brazilian electricity distribution system. It was developed in Brazil, the distribution procedures in the national electricity system (PRODIST), created and developed by the National Electric Energy Agency (ANEEL). PRODIST aims to standardize and standardize activities related to energy distribution, including product quality standards. In order to monitor the quality of the product "electric energy" through the harmonic content generated by the electric network of the institution, a methodology is proposed for the analysis using computational intelligence (CI) and data mining techniques to analyze the data collected by meters of energy quality installed in the main sectors of this institution and at the point of common coupling of the consumer and consequently establish the relationship between the harmonic currents of the nonlinear loads with the harmonic distortion at the common coupling point. The KDD process was applied, including the collection, selection, cleaning, integration, transformation and reduction, mining, interpretation and evaluation of the data, in order to monitor the quality of the product "electric energy" through the harmonic content generated by the electric grid. educational institution. In the "Data Mining" data mining phase, the Naive Bayes classifier was used. The obtained results showed that the KDD process has applicability in the analysis of the Total Harmonic Distortion of Voltage at the Common Coupling Point and can be applied in any commercial, residential and industrial area.
Acesso aberto (Open Access)
Avaliação da distorção harmônica total de tensão no ponto de acoplamento comum industrial usando o processo KDD baseado em medição
(Universidade Federal do Pará, 2018-03-27) OLIVEIRA, Edson Farias de; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
In the last decades, the transformation industry has provided the introduction of increasingly faster and more energy efficient products for residential, commercial and industrial use, however these loads due to their non-linearity have contributed significantly to the increase of distortion levels harmonic of voltage as a result of the current according to the Power Quality indicators of the Brazilian electricity distribution system. The constant increase in the levels of distortions, especially at the point of common coupling, has generated in the current day a lot of concern in the concessionaires and in the consumers of electric power, due to the problems that cause like losses of the quality of electric power in the supply and in the installations of the consumers and this has provided several studies on the subject. In order to contribute to the subject, this thesis proposes a procedure based on the Knowledge Discovery in Database - KDD process to identify the impact loads of harmonic distortions of voltage at the common coupling point. The proposed methodology uses computational intelligence and data mining techniques to analyze the data collected by energy quality meters installed in the main loads and the common coupling point of the consumer and consequently establish the correlation between the harmonic currents of the nonlinear loads with the harmonic distortion at the common coupling point. The proposed process consists in analyzing the loads and the layout of the location where the methodology will be applied, in the choice and installation of the QEE meters and in the application of the complete KDD process, including the procedures for collection, selection, cleaning, integration, transformation and reduction, mining, interpretation, and evaluation of data. In order to contribute, the data mining techniques of Decision Tree and Naïve Bayes were applied and several algorithms were tested for the algorithm with the most significant results for this type of analysis as presented in the results. The results obtained evidenced that the KDD process has applicability in the analysis of the Voltage Total Harmonic Distortion at the Point of Common Coupling and leaves as contribution the complete description of each step of this process, and for this it was compared with different indices of data balancing, training and test and different scenarios in different shifts of analysis and presented good performance allowing their application in other types of consumers and energy distribution companies. It also shows, in the chosen application and using different scenarios, that the most impacting load was the seventh current harmonic of the air conditioning units for the collected data set.
Acesso aberto (Open Access)
Avaliação operacional dos efeitos do perfil de demanda de quatro sistemas de microgeração fotovoltaica conectados à rede
(Universidade Federal do Pará, 2018-06-29) PARIJÓS JÚNIOR, Ivan Ruy de; PEREIRA, Edinaldo José da Silva; http://lattes.cnpq.br/9596575345034065; MACÊDO, Wilson Negrão; http://lattes.cnpq.br/3386249951714088
Power quality has been widely researched. Several phenomena that affect power quality, and its consequences, have been investigated. When the power quality theme involves the operation of a grid-connected photovoltaic system, the main concern is about the operation of the inverter, which is responsible for the interface of the photovoltaic generator with the grid. The introduction of photovoltaic generation in the grid requires attention on certain factors such as changes in the load curve, voltage level, harmonic components in the inverter current and variation on the power factor (PF) of the costumer. This work aims to test and evaluate some aspects that may influence the power quality due to the insertion of photovoltaic generation in the grid, associated whit the load demand. Four grid-connected photovoltaic systems were used to develop this work, as well as a data acquisition bench that was set up to monitor the operation of these systems. In this work it is possible to conclude that the operation of photovoltaic systems causes changes in the voltage level at the point of common coupling. Also, the interaction between photovoltaic systems and loads causes changes in the load profile measured by the side of the grid, causing the total harmonic distortion in the current (THDi) and PF measured at this side to be different from those measured at the loads and photovoltaic sides. It is possible to observe that the grid-connected photovoltaic system can contribute to increase or reduce the THDi seen by the local grid, where the greatest contribution of harmonic distortion in the current delivered by the grid is associated to the demand profile of the load.
Acesso aberto (Open Access)
Desenvolvimento de um simulador de redes elétricas para estudos da propagação de harmônicos
(Universidade Federal do Pará, 2016-08-23) LIMA, Diorge de Souza; BEZERRA, Ubiratan Holanda; http://lattes.cnpq.br/6542769654042813
The electricity sector in Brazil has faced many changes due to the modernization of electrical equipment, especially when it refers to residential consumers. This has provided a considerable increase in the level of harmonic distortion in the electric distribution networks, which can be explained by the large use of devices based on power electronics in an attempt to make them more efficient and compact. Therefore, it becomes necessary execute analysis of the levels of harmonic distortion in the power systems. Monitoring by power quality analyzer is the best way to collect data of the electrical system; however, the computer simulation is an efficient tool capable of reproducing the disturbances and behavior of the electric networks for different operating modes. Thus, this paper aims to present a computational environment that helps the harmonic propagation studies in electrical systems. For this, it was used the software ATP (Alternative Transient Program) for modeling the electrical system, the harmonic behavior of a nonlinear load is represented by effective values of harmonic currents in function of time. The measurements were obtained through power quality analysis of a distribution network in the North Region of Brazil. Thus, for this set of measures, a set of simulations was performed, providing for the users the values of harmonic voltages for all buses of the electrical system. Therefore, with the simulator of electrical networks it is possible perform harmonic propagation studies in several electrical systems, and it can work as a strategic planning tool for the use of mitigating measures or for the strategic control of harmonic distortion, from evaluations of most critical moments of harmonic distortion at all points of the network. To demonstrate its use, the industrial system of 13 bar was used as a test system for analysis in this dissertation.
Acesso aberto (Open Access)
Estudo dos efeitos das descargas atmosféricas nos índices de desempenho da Subestação de Vila do Conde
(Universidade Federal do Pará, 2014-09-11) PEREIRA, Jorge Luiz Moreira; ROCHA, Brigida Ramati Pereira da; http://lattes.cnpq.br/9943372249006341
This work aims to present the effects of lightning performance indexes in VDC (substation of Vila do Conde), located in the northern region, in the State of Pará, in the period from 2005 to 2013, establishing the relationship between the weather information provided by the SIPAM and data provided by the center of operations for Eletronorte in order to perform and determine the harmful effects of atmospheric discharges, which are responsible for the intensification of interruptions in the supply of electricity.The analysis is restricted to the area of expertise of Eletronorte (substation of Vila do Conde) which has much of its power transmission Lines installed in northern Brazil. The results show that the incidence of lightning can cause direct and indirect surges in transmission lines and substations of high power. In this context justifies the study of efficient forms of prevention, being one of the purposes of this work, which aims to provide general information concerning the effects produced by the action of atmospheric discharges in substations of the power sector as the quality of energy, in particular in the VDC – Eletrobrás System-Eletronorte.
Acesso aberto (Open Access)
Estudos dos efeitos das descargas atmosféricas nos índices de desempenho da subestação de Vila do Conde e subestação de Marabá
(Universidade Federal do Pará, 2016-05-10) SANTOS, Luciano Silva dos; PROTAZIO, João dos Santos; http://lattes.cnpq.br/4210442535067685; ROCHA, Brigida Ramati Pereira da; http://lattes.cnpq.br/9943372249006341
This paper aims to present the effects of lightning in the performance indices in Vila do Conde substation (SE VDC) and Maraba (SE MB), which are situated in the north, in the state of Pará, integrating the North System - Eletronorte Transmission northeast, being connected to the Tucuruí Hydroelectric Power Plants (HPP Tucuruí). They were studied, establishing relations between the weather information provided by the SIPAM and data provided by central Eletronorte's operations in the period 2005-2013 in order to determine the harmful effects of lightning, which are responsible for the intensification of supply interruptions electricity. The analysis restricted to the area of operation of Eletronorte SE and SE VDC MB. The study developed evidence disconnections by lightning on transmission line VDC / CASTANHAL 230 KV and 500 KV breaker VCDJ7-08 and transmission line MB / Empress of 500 KV. The results demonstrate that a lightning strike may cause direct and indirect surges in transmission lines and high power substations. In this context it justifies the study of efficient forms of prevention, one of the purposes of this work.
Acesso aberto (Open Access)
Gestão da manutenção de transformadores de distribuição visando à qualidade no fornecimento de energia elétrica
(Universidade Federal do Pará, 2008-11-14) CORRAL, Maria Filomena Brito do; BEZERRA, Ubiratan Holanda; http://lattes.cnpq.br/6542769654042813; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
This paper has the objective of showing the efficient management of the maintenance in power transformers that are operating in the electrical distribution grid, allowing effective actions which preserve the quality of the energy delivered to consumers, considering the criteria established in PRODIST – Electrical Energy Distribution Procedures in the Brazilian Electrical System. The applied method to reach this objective is the creation of an information system, which allows that the distribution maintenance manager to take decisions considering the occured interruptions and the impact caused in FEC – Equivalent Frequency of Interruptions for unit consumer and in loading of transformers. It is understood that the mitigation actions will be taken in sufficient time, being able to preserve the quality of the supply.
Acesso aberto (Open Access)
Impactos na qualidade da energia elétrica provenientes do rápido crescimento da demanda no Sudeste do Estado do Pará
(Universidade Federal do Pará, 2012-03-15) ESTEVES, Eduardo Augusto Cardoso; BEZERRA, Ubiratan Holanda; http://lattes.cnpq.br/6542769654042813; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
In the recent years, the social and economical development in the Southeast of the State of Pará has been mainly caused by the exploitation and processing of mineral industries, which added to the population growth, has generated a high increase in the demand of electric energy and consumption due to the increasing installation of new industrial, commercial, residential and rural single-phase charges. This global increase is impacting directly the performance of distribution of electric utility, which can be expressed by the permanent disturbances caused by harmonics, such as buzzing in the power transformer and disruption of medium voltage conductors. These disturbances will be presented in a study of case involving the Substations (SE’s) Itacaiúna and Itupiranga. To prove how they can be harmful in these SE’s, campaigns of measurement were performed to obtain practical results and then, to perform studies involving simulations of short-circuit, load flow and spreading of harmonics in order to obtain an analytical diagnostic about the situations found and thus to issue recommendations to solve the problems identified. This study will provide a valuable support to the Concessionaire of Energy and it may be taken as a reference to the study of Power Quality in other substations, in addition to experimental basis for future charges from ANEEL, regarding the implementation of procedures in Electric Power Distribution National Electric System (PRODIST).
Acesso aberto (Open Access)
Metodologia de auxílio na tomada de decisão na formação de conjuntos de unidades consumidoras de energia elétrica
(Universidade Federal do Pará, 2010-10-08) SANTOS, Fábio Corrêa dos; SANTANA, Ádamo Lima de; http://lattes.cnpq.br/4073088744952858; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
The issue of Proceedings of Electric Power Distribution (PRODIST) confirmed the comparative analysis of the distribution companies of electricity established by Resolution 024/2000 as the basis for establishing the goals of continuity indicators DEC (Costomer Average Duration Interruption Index) and FEC (Costomer Average Frequency Interruption Index). The setting of targets is directly influenced by the definition of the sets of consumer units of the distribution companies of electricity is therefore of interest to the distribution companies a good definition of these sets. This work presents the development of a methodology based on machine learning techniques to assist companies in electric power distribution in decision making of the definition of sets of consumers units aimed at improving compatibility of the goals for the indications of DEC and FEC with reality assemblies in relation to environmental characteristics and of infrastructure of the concession area of the distribution company.
Acesso aberto (Open Access)
Metodologia para diagnosticar a qualidade de energia elétrica referente à distorção harmônica em sistema trifásico de baixa tensão utilizando lógica fuzzy
(Universidade Federal do Pará, 2010-09-02) GONÇALVES, Benevaldo Pereira; COSTA JÚNIOR, Carlos Tavares da; http://lattes.cnpq.br/6328549183075122
This work emphasizes the importance of monitoring and diagnosing the quality of electric power from the viewpoint of harmonic distortion present in the electrical installation in low voltage three-phase system using a methodology to analyze and diagnose the level of harmonic disturbances evaluating the overall indicator of distortion Harmonic (THD), supported by an expert system based on a Fuzzy inference system.
Acesso aberto (Open Access)
Monitoração e análise de grandezas da qualidade da energia elétrica em processos industriais utilizando instrumentação virtual
(Universidade Federal do Pará, 2011-02-28) SANTOS, Michele de Nazaré Novaes; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
This work aims to develop a data acquisition system of driving electric loads in the industrial process of automated network system based on virtual instrumentation, enabling the monitoring and analysis of disturbances related to steady state Power Quality(PQ), such as voltage variations, harmonic distortion and voltage unbalance, where the results can be viewed on a friendly and intuitive interface to the user and stored conveniently in a database. This system is a viable solution due to have low cost in its implementation and to be flexible for monitoring and analyzing parameters of PQ in industrial processes when compared with traditional instrumentation.
Acesso aberto (Open Access)
Projeto multicritério de filtros harmônicos passivos para instalações industriais utilizando técnicas de inteligência computacional
(Universidade Federal do Pará, 2013-05-29) LEITE, Jandecy Cabral; BEZERRA, Ubiratan Holanda; http://lattes.cnpq.br/6542769654042813; TOSTES, Maria Emília de Lima; http://lattes.cnpq.br/4197618044519148
Due to the importance of the industrial growth in the North and in particular the Industrial Pole of Manaus (PIM), it is important to have mathematical tools that facilitate the expert decisions on the selection and sizing of harmonic filters needed to neutralize the harmful effects of harmonics generated by nonlinear loads of industry and achieve compliance with the power quality standards. Moreover, as the passive harmonic filters have the capacity to generate reactive power to the network, they are effective compensating reactive power means and therefore can achieve significant savings in sales of electric energy consumed by these industrial facilities. This thesis aims to develop a mathematical method and a computational tool for the selection of the configuration and the design parameters of a set of passive harmonic filters for industrial electrical systems. In this direction, the optimization problem of compensation of harmonics through passive filters is formulated as a multi-objective problem that considers both the goals of reducing harmonic distortion as the economic effectiveness of the project considering the characteristics of the Brazilian system of tariffs. Moreover, the presented formulation considers relevant restrictions imposed by the national and foreign standards. A computational solution to this problem was achieved using the NSGA-II genetic algorithm which determines a set of Pareto optimal solutions (Frontier) that enable the designer to choose the most appropriate solutions to the problem. Furthermore, the computational tool developed has several new features as: not only calculates the parameters that characterize the filters, but also selects the type of configuration and the number of branches of the filter in each candidate bus according to a set of predetermined settings; has implemented two standards for assessing the constraints of power quality (Prodist Modulo-8 and IEEE 519-92) that can be selected by the user; determines solutions with good performance indicators for various characteristic and non-characteristic scenarios of the system that allow to represent: the daily variations of the load as well as the variations of system parameters and filters; evaluates the cost of energy bills in a grid that has different industrial operating conditions (characteristic scenarios) and assesses the economic effect of harmonic filters as reactive power compensators. To develop the computational tool of this thesis, it was used a phase-coordinates model for the electric power grids of industrial and services installations to program additional computational tools. These tools comprise a frequency scan program, a harmonic power flow program for the harmonic current injection method and a fundamental frequency power flow program. The positive results of this thesis, from the analysis of several practical examples show the advantages of the developed method.
Acesso aberto (Open Access)
Qualidade da energia elétrica de uma nanorrede de distribuição em corrente contínua sob diferentes condições operacionais
(Universidade Federal do Pará, 2023-02-13) FONSECA, Arthur Corrêa da; GALHARDO, Marcos André Barros; http://lattes.cnpq.br/6672470707462259
This work presents an experimental study of electric power quality in a Direct Current Distribution Nanogrid (DCDN) implemented in the testing area of the Grupo de Estudos e Desenvolvimento de Alternativas Energéticas (GEDAE) building at the Universidade Federal do Pará (UFPA), Guamá campus, city of Belém-Pará. Power quality events are identified through tests carried out on the DCDN and classified based on the recommendation of the Institute of Electrical and Electronic Engineers (IEEE) - Recommendation Practice for Monitoring Electric Power Quality - Std 1159, 2019. The characteristics of the DCDN and the load banks subjected to the tests are presented, using commercial loads available on the market, as well as the instrumentation used for electrical and environmental measurements and data acquisition. Among the identified power quality events, long-term variations, transient events during the start operation of DC-DC converters, voltage elevations and sags with the operation and output of loads, and voltage ripple along the DCDN are evaluated. As an additional case study, interruption events are also evaluated in a DCDN located in Onças Island, in the municipality of Barcarena. Thus, in view of the tests and measurements carried out, power quality events present in the DCDN supplied by dispersed photovoltaic generators and battery banks are evidenced, highlighting the influence of these events on different loads connected along the distribution network and under different operational condition