Worldwide, renewable energy systems are booming with reliable distributed generation (DG) technologies to help fuel increasing global energy consumption and mitigate the corresponding environmental problems. High cost and low efficiency are major problems for such systems using traditional buck inverters with line-frequency transformers. This thesis has proposed a novel single-phase single-stage buck-boost inverter suitable for cost-effective small DG systems. The inverter was analyzed from the angle of energy exchange and transfer with two current control schemes, DCM and CCM. Sinusoidal PWM (SPWM) control method, based on DCM, was discussed in details with steady state analyses, computer simulations, and laboratory tests. A concise model with underlying equations was derived to represent the physical behavior of proposed inverter. Closed-loop SPWM control was simulated and verified to have fast dynamic response and good tracking performance with robustness and insensitivity to dc input fluctuations, ac grid variations, and component parametric uncertainties. Other control strategies were also investigated from the critical DCM, CCM, or energy approach to either increase the fundamental output or further improve the performance. Comparisons demonstrated that SPWM was preferred control method with low output THD, reduced switching losses, and simple implementation. Therefore, it is concluded the proposed inverter provides a low-cost and high-efficient solution for small DG systems with low component count, minimal dc and ac filtering requirements, and improved performance.

Distributed generation (DG) with a converter interface to the power grid is found in many of the green power resources applications. This dissertation describes a multi-objective control technique of voltage source converter (VSC) based on multilevel converter topologies, for integration of DG resources based on renewable energy (and non-renewable energy)to the power grid. The aims have been set to maintain a stable operation of the power grid, in case of di erent types of grid-connected loads. The proposed method provides compensation for active, reactive, and harmonic load current components. A proportional-integral (PI) control law is derived through linearization of the inherently non-linear DG system model, so that the tasks of current control dynamics and dc capacitor voltage dynamics become decoupled. This decoupling allows us to control the DG output currents and the dc bus voltage independently of each other, thereby providing either one of these decoupled subsystems a dynamic response that signi cantly slower than that of the other. To overcome the drawbacks of the conventional method, a computational control delay compensation method, which delaylessly and accurately generates the DG reference currents, is proposed. The rst step is to extract the DG reference currents from the sensed load currents by applying the stationary reference frame and then transferred into synchronous reference frame method, and then, the reference currents are modi ed, so that the delay will be compensated. The transformed variables are used in control of the multilevel voltage source converter as the heart of the interfacing system between DG resources and power grid. By setting appropriate compensation current references from the sensed load currents in control circuit loop of DG link, the active, reactive, and harmonic load current components will be compensated with fast dynamic response, thereby achieving sinusoidal grid currents in phase with load voltages while required power of loads is more than the maximum injected power of the DG resources. The converter, which is controlled by the described control strategy, guarantees maximum injection of active power to the grid continuously, unity displacement power factor of power grid, and reduced harmonic load currents in the common coupling point. In addition, high current overshoot does not exist during connection of DG link to the power grid, and the proposed integration strategy is insensitive to grid overload. / La Generació Distribuïda (DG) injectada a la xarxa amb un convertidor estàtic és una solució molt freqüent en l'ús de molts dels recursos renovables. Aquesta tesis descriu una técnica de control multi-objectiu del convertidor en font de tensió (VSC), basat en les topologies de convertidor multinivell, per a la integració de les fonts distribuïdes basades en energies renovables i també de no renovables.Els objectius fixats van encaminats a mantenir un funcionament estable de la xarxa elèctrica en el cas de la connexió de diferents tipus de càrregues. El mètode de control proposat ofereix la possibilitat de compensació de les components actives i reactives de la potencia, i les components harmòniques del corrent consumit per les càrregues.La llei de control proporcional-Integral (PI) s’obté de la linearització del model inherentment no lineal del sistema, de forma que el problema de control del corrent injectat i de la tensió d’entrada del convertidor queden desacoblats. Aquest desacoblament permet el control dels corrents de sortida i la tensió del bus de forma independent, però amb un d’ells amb una dinàmica inferior.Per superar els inconvenients del mètode convencional, s’usa un retard computacional, que genera les senyals de referència de forma acurada i sense retard. El primer pas es calcular els corrents de referència a partir de les mesures de corrent. Aquest càlcul es fa primer transformant les mesures a la referència estacionaria per després transformar aquests valors a la referència síncrona. En aquest punt es on es poden compensar els retards.Les variables transformades son usades en els llaços de control del convertidor multinivell. Mitjançant aquests llaços de control i les referències adequades, el convertidor és capaç de compensar la potencia activa, reactiva i els corrents harmònics de la càrrega amb una elevada resposta dinàmica, obtenint uns corrents de la xarxa de forma completament sinusoïdal, i en fase amb les tensions.El convertidor, controlat amb el mètode descrit, garanteix la màxima injecció de la potencia activa, la injecció de la potencia reactiva per compensar el factor de potencia de la càrrega, i la reducció de les components harmòniques dels corrents consumits per la càrrega. A més, garanteix una connexió suau entre la font d’energia i la xarxa. El sistema proposat es insensible en front de la sobrecarrega de la xarxa

Electricity networks are undergoing a period of rapid change and transformation, with increased penetration levels of renewable-based distributed generation, and new influences on electricity end-use patterns from demand-manageable loads and micro-generation. This creates a number of new challenges for the delivery of a reliable supply of electrical energy. The main aim of this PhD research is to provide a methodology for a more detailed and accurate assessment of the effects of wind-based distributed generation (DG) and demand side management (DSM) on transmission network operation. In addition, the work investigates the potential for co-ordinated implementation and control of DG and DSM to improve overall system performance. A significant amount of previous literature on network integration of DG and DSM resources has focused on the effects at the distribution level, where their impact is direct and often easily observed. However, as penetration levels increase, DG and DSM will have a growing influence on the operation and management of the bulk transmission system. Modelling and analysis of the impact of embedded and highly-dispersed DG and DSM resources at transmission voltage levels will present a significant challenge for transmission network operators in the future. Accordingly, this thesis presents a number of new approaches and methodologies allowing for a more accurate modelling and aggregation of DG and DSM resources in power system studies. The correct representation of input wind energy resources is essential for accurate estimation of power and energy outputs of wind-based DG. A novel modelling approach for a simple and accurate representation of the statistical and temporal characteristics of the wind energy resources is presented in the thesis. An "all-scale" approach to modelling and aggregation of wind-based generation is proposed, which is specifically intended for assessing the impact of embedded wind generation on the steady state performance of transmission systems. The methodology allows to include in the analysis wind-based generation at all scales and all levels of implementation, from micro and small LV-connected units, through medium-size wind plants connected at MV, up to large HV-connected wind farms. The thesis also presents an assessment of the potential for DSM in the UK residential and commercial sectors, based on the analysis and decomposition of measured demands at system bulk supply points into the corresponding load types. Using a section of the Scottish transmission network as a case study, a number of DG and DSM scenarios are investigated in detail. These results demonstrate the importance of accurately modelling the interactions between the supply system and various DG and DSM schemes, and show that the aggregated effects of highly-distributed DG and DSM resources can have significant impacts on the operation of the bulk transmission system.

A matriz brasileira de energia elétrica foi construída historicamente como resultado da confrontação de interesses econômicos, políticos e sociais. Graças a avanços tecnológicos, o setor elétrico brasileiro passa por uma fase de possível inserção de novos modelos, como a geração distribuída de fontes energéticas alternativas, como eólica, biomassa e solar fotovoltaica. Este trabalho oferece uma análise institucional para a compreensão das possibilidades de inserção da geração distribuída fotovoltaica na rede elétrica. Essa análise institucional foi feita através de uma triangulação de técnicas, partindo de revisão bibliográfica de literatura científica, que gerou um modelo analítico para identificar e classificar os principais marcos históricos que direcionaram a estruturação da matriz energética brasileira. Os dados foram confrontados com as entrevistas em profundidade com especialistas do setor elétrico. Os resultados fundamentaram modelos que descrevem a formação histórica de instituições sob os aspectos econômicos, técnicos e normativos. Além disso, os resultados indicam um cenário favorável para investimentos em geração distribuída fotovoltaica até o final da década de 2020, mas também sugerem um possível conflito de equacionamento de custos entre os geradores distribuídos e as concessionárias de distribuição de energia elétrica / The Brazilian electric matrix was built historically as a result of the confrontation among economic, political and social interests. Given the technological advance, the Brazilians electric sector can introduce new models of electric generation, as the distributed generation from alternative energy sources as wind, biomass and photovoltaics. This study offers an institutional analysis to comprehend the perspectives of introducing distributed generation from photovoltaics on Brazilian electric network. This institutional analysis undertook a triangulation of techniques, starting from a literature review, which supported an analysis model. This model was used to identify and classify the main historic marks that constrained the choices concerning the Brazilians electric matrix composition. Historical data was confronted to in-depth interviews with specialists of the Brazilians electric sector. Results supported models which describe the historic formation of institutions under economic, technical and normative aspects. Furthermore the results indicate a favorable scenario to invest in distributed generation from photovoltaic systems in Brazil, at least until 2020, but they also forecast a possible conflict concerning the balance of some costs between the local energys distributor and the owners of distributed generation systems

A matriz brasileira de energia elétrica foi construída historicamente como resultado da confrontação de interesses econômicos, políticos e sociais. Graças a avanços tecnológicos, o setor elétrico brasileiro passa por uma fase de possível inserção de novos modelos, como a geração distribuída de fontes energéticas alternativas, como eólica, biomassa e solar fotovoltaica. Este trabalho oferece uma análise institucional para a compreensão das possibilidades de inserção da geração distribuída fotovoltaica na rede elétrica. Essa análise institucional foi feita através de uma triangulação de técnicas, partindo de revisão bibliográfica de literatura científica, que gerou um modelo analítico para identificar e classificar os principais marcos históricos que direcionaram a estruturação da matriz energética brasileira. Os dados foram confrontados com as entrevistas em profundidade com especialistas do setor elétrico. Os resultados fundamentaram modelos que descrevem a formação histórica de instituições sob os aspectos econômicos, técnicos e normativos. Além disso, os resultados indicam um cenário favorável para investimentos em geração distribuída fotovoltaica até o final da década de 2020, mas também sugerem um possível conflito de equacionamento de custos entre os geradores distribuídos e as concessionárias de distribuição de energia elétrica / The Brazilian electric matrix was built historically as a result of the confrontation among economic, political and social interests. Given the technological advance, the Brazilians electric sector can introduce new models of electric generation, as the distributed generation from alternative energy sources as wind, biomass and photovoltaics. This study offers an institutional analysis to comprehend the perspectives of introducing distributed generation from photovoltaics on Brazilian electric network. This institutional analysis undertook a triangulation of techniques, starting from a literature review, which supported an analysis model. This model was used to identify and classify the main historic marks that constrained the choices concerning the Brazilians electric matrix composition. Historical data was confronted to in-depth interviews with specialists of the Brazilians electric sector. Results supported models which describe the historic formation of institutions under economic, technical and normative aspects. Furthermore the results indicate a favorable scenario to invest in distributed generation from photovoltaic systems in Brazil, at least until 2020, but they also forecast a possible conflict concerning the balance of some costs between the local energys distributor and the owners of distributed generation systems

Within the past decade, talk has arisen of shifting the utility grid from centralized, radial sources to a distributed network of sources, also known as distributed generation (DG); in the wake of deregulation, the California energy crisis, and northeastern blackouts. Existing control techniques for DG systems are designed to operate a system either in the connected or disconnected (islanding) mode to the utility; thus not allowing for both modes to be implemented and transitioned between. Existing detection and re-closure algorithms can also be improved upon. Dependent upon the method implemented, detection algorithms can either cause distortions in the output or completely miss a disturbance. The present re-closure process to reconnect to the utility is to completely shutdown and wait five minutes. The proposed methods of this study improve upon existing methods, via simulation and hardware experimentation, for DG systems that can intentionally islanding themselves. The proposed, "switched-mode", control allows for continuous operation of the system during disturbances by transitioning the mode of control to reflect the change in the system mode (grid-connected or islanding). This allows for zero downtimes without detrimental transients. The proposed detection method can sense disturbances that other methods cannot; and within 25 ms (approximately 1.5 line-cycles at 60 Hz). This method is an improvement over other methods because it eliminates the need to purposely distort the outputs to sense a disturbance. The proposed re-closure method is an improvement over the existing method due to the fact that it does not require the system to de-energize before re-synchronizing and reconnecting to the utility. This allows for DGs to continuously supply power to the system without having to shut down. Results show that the system is generally ready to reconnect after 2 to 5 line cycles. / Master of Science

Feeder reconfiguration is performed by changing the open/close status of two types of switches: normally open tie switches and normally closed sectionalizing switches. A whole feeder or part of a feeder may be served from another feeder by closing a tie switch linking the two while an appropriate sectionalizing switch must be opened to maintain the radial structure of the system. Feeder reconfiguration is mainly aiming to reduce the system overall power losses and improve voltage profile. In this dissertation, several approaches have been proposed to reconfigure the radial distribution networks including the potential impact of integrating Distributed Energy Resources (DER) into the grid. These approaches provide a Fast-Genetic Algorithm “FGA” in which the size and convergence speed is improved compared to the conventional genetic algorithm. The size of the population matrix is also smaller because of the simple way of constructing the meshed network. Additionally, FGA deals with integer variable instead of a binary one, which makes FGA a unique method. The number of the mesh/loop is based on the number of tie switches in a particular network. The validity of the proposed FGA is investigated by comparing the obtained results with the one obtained from the most recent approaches. The second the approach is the implementation of the Differential Evolution (DE) algorithm. DE is a population-based method using three operators including crossover, mutation, and selection. It differs from GA in that genetic algorithms rely on crossover while DE relies on mutation. Mutation is based on the differences between randomly sampled pairs of solutions in the population. DE has three advantages: the ability to find the global optimal result regardless of the initial values, fast convergence, and requirement of a few control parameters. DE is a well-known and straightforward population-based probabilistic approach for comprehensive optimization. In distribution systems, if a utility company has the right to control the location and size of distributed generations, then the location and size of DGs may be determined based on some optimization methods. This research provides a promising approach to finding the optimal size and location of the planned DER units using the proposed DE algorithm. DGs location is obtained using the sensitivity of power losses with respect to real power injection at each bus. Then the most sensitive bus is selected for installing the DG unit. Because the integration of the DG adds positive real power injections, the optimal location is the one with the most negative sensitivity in order to get the largest power loss reduction. Finally, after the location is specified, the proposed Differential Evolution Algorithm (DEA) is used to obtain the optimal size of the DG unit. Only the feasible solutions that satisfy all the constraints are considered. The objective of installing DG units to the distribution network is to reduce the system losses and enhance the network voltage profile. Nowadays, these renewable DGs are required to equip with reactive power devices (such as static VAR compensators, capacitor banks, etc.), to provide reactive power as well as to control the voltage at their terminal bus. DGs have various technical benefits such as voltage profile improvement, relief in feeder loading, power loss minimization, stability improvement, and voltage deviation mitigation. The distributed generation may not achieve its full potential of benefits if placed at any random location in the system. It is necessary to investigate and determine the optimum location and size of the DG. Most distribution networks are radial in nature with limited short-circuit capacity. Therefore, there is a limit to which power can be injected into the distribution network without compromising the power quality and the system stability. This research is aiming to investigate this by applying DG technologies to the grid and keeping the system voltage within a defined boundary [0.95 - 1.05 p.u]. The requirements specified in IEEE Standard 1547 are considered. This research considers four objectives related to minimization of the system power loss, minimization of the deviations of the nodes voltage, minimization of branch current constraint violation, and minimization of feeder’s currents imbalance. The research formulates the problem as a multi-objective problem. The effectiveness of the proposed methods is demonstrated on different revised IEEE test systems including 16 and 33-bus radial distribution system.

O objetivo desta pesquisa é avaliar os parâmetros urbanísticos que influenciam a forma urbana e, consequentemente, maximizam a geração de energia fotovoltaica, no município de São Paulo, tomando por estudo de caso o bairro Belenzinho, em processo de adensamento e verticalização. A avaliação dos parâmetros urbanísticos foi realizada por meio do software de modelagem tridimensional Rhinoceros®, utilizando dois vértices: inicialmente, foi modelada a variação isolada dos parâmetros urbanísticos, utilizando Rhinoceros® associado aos plug-ins Grasshopper® e Diva®, com a finalidade de identificar os valores dos parâmetros urbanísticos que maximizam as respostas da forma urbana em relação à incidência de radiação solar na cobertura das edificações; em seguida, adicionou-se o algoritmo genético Galapagos, identificando-se a melhor combinação dos valores dos parâmetros urbanísticos quanto à maximização da incidência de radiação solar na cobertura das edificações. As análises mostraram que no cenário morfológico atual, 86% da cobertura das edificações existentes recebem entre 1840 e 1879 kWh/m2.ano de incidência de radiação solar, porém, algumas edificações são prejudicadas com sombreamento causada pelas edificações vizinhas. Quando se objetiva otimizar a geração de energia solar fotovoltaica na cobertura de empreendimentos distribuídos no tecido urbano, valores de coeficiente de aproveitamento 3, quando o máximo permitido é 4, ou valores de coeficiente de aproveitamento 2, quando o máximo permitido é 2, associados a taxas de ocupação de 0,70, mostram-se apropriados. A aplicação do Galapagos indica que o ganho da radiação solar incidente por área total de cobertura, através da simulação da variação combinada dos parâmetros urbanísticos, é, em média, 60% maior quando comparado com o pior cenário da variação isolada dos parâmetros urbanísticos, no cenário com empreendimentos distribuídos. Porém, quando se objetiva otimizar a geração de energia solar fotovoltaica na cobertura de empreendimentos concentrados no tecido urbano, valores de coeficiente de aproveitamento 3 e 4, quando o máximo permitido é 4, associados a taxas de ocupação de 0,40, mostram-se apropriados. O uso do Galapagos indica que o ganho da radiação solar incidente por área total de cobertura, através da simulação da variação combinada dos parâmetros urbanísticos, é, em média, 40% maior quando comparado com o pior cenário da variação isolada dos parâmetros urbanísticos, no cenário com empreendimentos concentrados. Assim, a pesquisa indica que a definição de uma política energética municipal para aproveitamento fotovoltaico na cobertura de edificações passa pela análise da viabilidade de soluções de geração concentradas ou distribuídas no território urbano, o que impacta em diferentes formas de apropriação dessa variável na regulação da ocupação do solo, no que tange à definição de intervalos de valores dos parâmetros urbanísticos, gabarito de altura, assim como no uso do solo. / The present study analyses the parameters of the urban form that conditions the PV power generation capacity in a neighbourhood in São Paulo: Belenzinho, which is in verticalization and densification processes. The urban analysis was modeled with Rhinoceros® 3D software, with two vertices. Initially, the case-study area was modeled based on the isolated variation of the urban parameters, with Rhinoceros® software associated with Grasshopper® and Diva® plug-ins, in order to identify the best and worse urban parameter values, considering the solar radiation incidence on the rooftops of isolated buildings. Then, Galapagos genetic algorithm was applied for the purpose of combining the urban parameters, and identified the most suitable values for better exploitation of solar radiation. The analysis showed that in the current morphological scenario, 86% of the existing buildings rooftops have values of solar radiation between 1840 and 1879 kWh/m2.year, withal, some buildings are affected by shading caused by neighboring buildings. When optimizing the generation of photovoltaic solar energy in the rooftops of buildings distributed in area of this case study, values 3 for floor area ratio, when the maximum allowed is 4, or values 2 for floor area ratio, when the maximum allowed is 2, associated to values 0.70 of building coverage ratio to be appropriate. The study indicates that the gain of incident solar radiation by total coverage area through the simulation of the Galapagos genetic algorithm, represents on average 60% more when compared to the worst scenario of the isolated variation of the urban parameters, in isolated buildings. However, when the objective is to optimize the generation of photovoltaic solar energy in the rooftops of concentrated buildings in area of case study, values 3 and 4 for floor area ratio, when the maximum allowed is 4, associated to values 0.40 of building coverage ratio to be appropriate. The study indicates that the gain of incident solar radiation by total coverage area through the simulation of the Galapagos genetic algorithm, represents on average 40% more when compared to the worst scenario of the isolated variation of the urban parameters, in concentrated buildings. Thus, the definition of a municipal energy policy for photovoltaic application on the top of buildings involves the analysis of the feasibility of more concentrated or distributed generation solutions in the urban territory, and its appropriation of this variable in the land use regulation, in relation to the definition of ranges of values of urban planning parameters, building\'s height and land use.

Estudos convencionais de identificacao e de viabilidade de potenciais de producao de energia eletrica eolica e hidroeletrica de pequena escala demandam trabalhos de campo que, muitas vezes, implicam na inviabilidade economica do negocio em funcao dos seus onerosos custos. Alem disso, a execucao desses trabalhos nao assegura ao investidor a recuperacao desses onerosos recursos despendidos, principalmente se o potencial estudado apresentar inviabilidade tecnico-economica. Acrescenta-se ainda a esse risco, a possibilidade do investidorexecutor dos estudos iniciais (estimativa e inventario/viabilidade) nao contrair a outorga de exploracao do potencial, que e oferecida publicamente pelo Orgao Regulador. Entretanto, esse risco pode ser mitigado com a indicacao orientativa de viabilidade, com custos reduzidos. Por outro lado, ha uma forte tendencia de implantacao de pequenas centrais de producao de energia, caracterizadas como \"Geracao Distribuida\" (GD), em virtude dos atuais incentivos regulatorios para essas fontes, das recentes restricoes ambientais e da escassez de investimentos em grandes projetos. Neste contexto, esta dissertacao apresenta um modelo de obtencao de pre-viabilidade de potenciais fundamentado em caracteristicas tecnicas de componentes de Usinas Eolicas (EOL\'s) e Pequenas Centrais Hidreletricas (PCH\'s), com atributos fisicos geograficamente representados e consultados em um ambiente de geoprocessamento informatizado. Esse modelo proposto realiza estimativa de indicadores tecnico-economicos de centrais, produzindo estudos de pre-viabilidade com rapidez e baixo custo. De posse desse modelo o investidor pode simular a implementacao de varios aproveitamentos eolicos e hidroeletricos, antes de mobilizacao e de levantamentos de campo mais precisos e onerosos, obtendo dessa forma orientacoes importantes para direcionar sua atencao, com minimizacao de incertezas envolvidas na pre-viabilidade do potencial. / Identification and viability studies on small scale production of electrical energy based on wind and hydro power conventionally demand onerous field work whose costs frequently imply economic unfeasibility of the business. Moreover, the execution of these works does not assure that the investor will recover its expended resources, mainly if the potential analysis of the business demonstrates its technical and economic unfeasibility. Additionally, there is the possibility of not contracting the concession to this potential exploration, which is publicly offered by the Regulatory Agency, by the investor-executor of the initial studies (estimative, inventory and viability). However, this risk can be mitigated by the guiding indication of viability, with reduced costs. On the other hand, it has one strong trend of implantation of smallscale power generation, characterized as \"Distributed Generation\" (DG), because of its current legal incentives and also because of the recent ecological restrictions and the scarcity of investments in large enterprises. In this context, this work presents a pre-viability of potentials attainment model based on technical characteristics of Wind Plants and Small Hydroelectric Plants (SHP\'s) components, whose physical attributes are geographically represented and consulted in a geographic information system. The proposed model estimates the technical and economical pointers of power plants, producing fast and low-cost studies of pre-viability. Trough this model the investor can simulate wind power and hydropower exploration before mobilizating onerous and accurate field researches, getting an important guiding to its priorities, minimizing uncertainties in the process.

Estudos convencionais de identificacao e de viabilidade de potenciais de producao de energia eletrica eolica e hidroeletrica de pequena escala demandam trabalhos de campo que, muitas vezes, implicam na inviabilidade economica do negocio em funcao dos seus onerosos custos. Alem disso, a execucao desses trabalhos nao assegura ao investidor a recuperacao desses onerosos recursos despendidos, principalmente se o potencial estudado apresentar inviabilidade tecnico-economica. Acrescenta-se ainda a esse risco, a possibilidade do investidorexecutor dos estudos iniciais (estimativa e inventario/viabilidade) nao contrair a outorga de exploracao do potencial, que e oferecida publicamente pelo Orgao Regulador. Entretanto, esse risco pode ser mitigado com a indicacao orientativa de viabilidade, com custos reduzidos. Por outro lado, ha uma forte tendencia de implantacao de pequenas centrais de producao de energia, caracterizadas como \"Geracao Distribuida\" (GD), em virtude dos atuais incentivos regulatorios para essas fontes, das recentes restricoes ambientais e da escassez de investimentos em grandes projetos. Neste contexto, esta dissertacao apresenta um modelo de obtencao de pre-viabilidade de potenciais fundamentado em caracteristicas tecnicas de componentes de Usinas Eolicas (EOL\'s) e Pequenas Centrais Hidreletricas (PCH\'s), com atributos fisicos geograficamente representados e consultados em um ambiente de geoprocessamento informatizado. Esse modelo proposto realiza estimativa de indicadores tecnico-economicos de centrais, produzindo estudos de pre-viabilidade com rapidez e baixo custo. De posse desse modelo o investidor pode simular a implementacao de varios aproveitamentos eolicos e hidroeletricos, antes de mobilizacao e de levantamentos de campo mais precisos e onerosos, obtendo dessa forma orientacoes importantes para direcionar sua atencao, com minimizacao de incertezas envolvidas na pre-viabilidade do potencial. / Identification and viability studies on small scale production of electrical energy based on wind and hydro power conventionally demand onerous field work whose costs frequently imply economic unfeasibility of the business. Moreover, the execution of these works does not assure that the investor will recover its expended resources, mainly if the potential analysis of the business demonstrates its technical and economic unfeasibility. Additionally, there is the possibility of not contracting the concession to this potential exploration, which is publicly offered by the Regulatory Agency, by the investor-executor of the initial studies (estimative, inventory and viability). However, this risk can be mitigated by the guiding indication of viability, with reduced costs. On the other hand, it has one strong trend of implantation of smallscale power generation, characterized as \"Distributed Generation\" (DG), because of its current legal incentives and also because of the recent ecological restrictions and the scarcity of investments in large enterprises. In this context, this work presents a pre-viability of potentials attainment model based on technical characteristics of Wind Plants and Small Hydroelectric Plants (SHP\'s) components, whose physical attributes are geographically represented and consulted in a geographic information system. The proposed model estimates the technical and economical pointers of power plants, producing fast and low-cost studies of pre-viability. Trough this model the investor can simulate wind power and hydropower exploration before mobilizating onerous and accurate field researches, getting an important guiding to its priorities, minimizing uncertainties in the process.