The rapid spreading of the Photovoltaic (PV) Systems as Distributed Generation (DG) in medium and low voltage networks created many effects and changes on the existing power system networks. In this work, two methods ...The rapid spreading of the Photovoltaic (PV) Systems as Distributed Generation (DG) in medium and low voltage networks created many effects and changes on the existing power system networks. In this work, two methods have been used and applied to determine the optimal allocation and sizing of the PV to be installed as DGs (ranging from 250 kW up to 3 MW). The first one is to determine the location according to the maximal power losses reduction over the feeder. The second one is by using the Harmony Search Algorithm which is claimed to be a powerful technique for optimal allocation of PV systems. The results of the two techniques were compared and found to be nearly closed. Furthermore, investigation on the effects on the feeder in terms of voltage levels, power factor readings, and short circuit current levels has been done. All calculations and simulations are conducted by using the MATLAB Simulation Program. Some field calculations and observations have been expended in order to substantiate the research findings and validation.展开更多
There are five main institutions that develop research and provide data regarding photovoltaic energy generation in Brazil, they are: Brazilian Electricity Regulatory Agency (ANEEL);Energy Research Office (EPE);Intern...There are five main institutions that develop research and provide data regarding photovoltaic energy generation in Brazil, they are: Brazilian Electricity Regulatory Agency (ANEEL);Energy Research Office (EPE);International Renewable Energy Agency (IRENA);Institute for the Development of Alternative Energies in Latin America (IDEAL);and Greener (a research and consultancy company specialized in the photovoltaic solar energy sector). The reports provided by these institutions present a large volume of data and information, this factor makes hard task of understanding the Brazilian photovoltaic market. Therefore, this paper purposes to present an overview about the development of photovoltaic generation in Brazil, through of an unpublished compilation and analysis of the data provided by the institutions previously cited. For this, initially<span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">the factors that contributed to the implementation and expansion of this sector are presented. Following, it is presented the main resolutions for the implementation of distributed generation, as well as organizations responsible for the standardization, operation, testing and expected requirements for connection of renewable sources in the electrical system. Quantitative data about energy installed, number of installations approvals, distribution of installations by sector of society, number homologations by power range and cost distribution for the implementation of these systems are provided. Finally, the incentive policies, credit lines and future perspectives for the development of the photovoltaic sector in Brazil are presented.</span></span></span>展开更多
文摘The rapid spreading of the Photovoltaic (PV) Systems as Distributed Generation (DG) in medium and low voltage networks created many effects and changes on the existing power system networks. In this work, two methods have been used and applied to determine the optimal allocation and sizing of the PV to be installed as DGs (ranging from 250 kW up to 3 MW). The first one is to determine the location according to the maximal power losses reduction over the feeder. The second one is by using the Harmony Search Algorithm which is claimed to be a powerful technique for optimal allocation of PV systems. The results of the two techniques were compared and found to be nearly closed. Furthermore, investigation on the effects on the feeder in terms of voltage levels, power factor readings, and short circuit current levels has been done. All calculations and simulations are conducted by using the MATLAB Simulation Program. Some field calculations and observations have been expended in order to substantiate the research findings and validation.
文摘There are five main institutions that develop research and provide data regarding photovoltaic energy generation in Brazil, they are: Brazilian Electricity Regulatory Agency (ANEEL);Energy Research Office (EPE);International Renewable Energy Agency (IRENA);Institute for the Development of Alternative Energies in Latin America (IDEAL);and Greener (a research and consultancy company specialized in the photovoltaic solar energy sector). The reports provided by these institutions present a large volume of data and information, this factor makes hard task of understanding the Brazilian photovoltaic market. Therefore, this paper purposes to present an overview about the development of photovoltaic generation in Brazil, through of an unpublished compilation and analysis of the data provided by the institutions previously cited. For this, initially<span><span><span style="font-family:;" "=""> </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">the factors that contributed to the implementation and expansion of this sector are presented. Following, it is presented the main resolutions for the implementation of distributed generation, as well as organizations responsible for the standardization, operation, testing and expected requirements for connection of renewable sources in the electrical system. Quantitative data about energy installed, number of installations approvals, distribution of installations by sector of society, number homologations by power range and cost distribution for the implementation of these systems are provided. Finally, the incentive policies, credit lines and future perspectives for the development of the photovoltaic sector in Brazil are presented.</span></span></span>
