Brazilian Energy Research Articles

Green Energies: Biomass as an Energy Source in Brazil

Objective: To investigate the role of biomass as a renewable energy source in Brazil, highlighting its importance in the energy matrix and its potential to contribute to sustainability and waste management. Methodology: A bibliographic review was carried out in databases such as SciELO and Google Academic. The research focused on publications in Portuguese over the last five years, using inclusion criteria to select relevant articles. The analysis was divided into initial screening and detailed qualitative analysis, allowing a comprehensive understanding on the topic. Results and Data Analysis: The results indicate that biomass is a significant source of energy in Brazil, contributing to the diversification of the energy matrix and to the reduction of greenhouse gas emissions. The production of ethanol from sugarcane and the use of agricultural and forestry waste are particularly important. However, the research also points to challenges such as the need for adequate infrastructure and sustainable agricultural practices. Final Considerations: Brazil has vast potential to become a leader in green energy, especially biomass. The responsible promotion of this energy source, together with technological innovations and effective public policies, can ensure a sustainable energy future, contributing to environmental preservation and economic development.

A Thermodynamic Comparison of Exergy Production from Sugarcane and Photovoltaic Modules in the Context of Brazilian Energy Transition

This article applies the exergy analysis to the production and use of sugarcane, considering a model published in the literature. In this way, we compute incident solar irradiation, carbohydrate production, water consumption, and the production of stalks and straws. Following the production estimate, we analyze a biorefinery production cycle, from solar irradiation to the biorefinery products on an exergy basis, from birth to production of sugar, electrical energy, and ethanol. The calculated sugarcane production values are 80.7 tons per hectare for a 52-week cycle. As a result, the average exergy efficiency of sugarcane is 4.99%, reaching peaks of 8.3%. When considering only the useful exergy generated in the production of stalks and straw, an annual yield of 17.86 kWh/m2 represents an overall exergy efficiency of 1.31%. Considering the energy conversion processes in the biorefinery, the exergy efficiency from the radiation to the products from the biorefinery was 0.38%. The photovoltaic modules already have a well-established application in the country, though they need to increase their insertion over time, whereby the panels exhibit an average exergy efficiency of 31.6%, resulting in an annual electrical energy production of 255.84 kWh/m2. The results show that photovoltaic modules are a more efficient alternative than sugarcane regarding exergy land use. In conclusion, this study briefly discusses the use of sugarcane and photovoltaic modules in the context of Brazil’s energy transition towards a reduced dependence on fossil fuels, based on the fact that sugarcane already has a low carbon footprint for transportation using ethanol, with supply from more than 40,000 stations, and a similar or lower carbon footprint than electrical vehicles used across the country.

Hybrid method for benchmarking the operating costs of Brazilian energy distributors

Purpose: This study aims to propose a model for benchmarking evaluation, applied to the Brazilian regulatory system in establishing efficient operating costs for electricity distribution concessionaires. Theoretical framework: The application of data envelopment analysis to the regulation of electrical energy distribution is discussed, elucidating how different regulatory models accompany this modality. Methodology: The proposed methodology is based on a benchmarking evaluation model that integrates the associated use of Data Envelopment Analysis and Stochastic Frontier Analysis, through a methodology that establishes the evaluation of efficiency in Three Stages. Findings: The results of the performance assessment were expressed in terms of management efficiency, in which the effects of the operational environment and statistical noise are controlled, resulting in a rigorous measure of efficiency, by introducing manageable and unmanageable variables into the calculation directly from efficiency. Originality: The methodology allows to adjust operational costs, by levelling the operating environment of each electricity distribution concessionaire before repeating the DEA analysis, making the concessionaires' performance more coherent with the characteristics of the Brazilian market. Keywords: Electricity Distribution; Efficient Operating Costs; Benchmarking; Data Envelopment Analysis (DEA); Stochastic Frontier Analysis (SFA).

Grid-Connected Photovoltaic System for Generating Energy to Dairy Farm Activities

Minas Gerais is the leading milk-producing state in Brazil, and many dairy activities are supplied with electricity by the cable aerial network of the electrical energy state company. Given that the Brazilian energy matrix relies primarily on hydroelectric power, studies on the potential of other renewable energy sources in the context of dairy farms are innovative. Additionally, frequent disturbances and interruptions have motivated the installation of solar energy systems on dairy farms. However, the scarcity of technical and scientific studies demonstrating the benefits of electricity generated from photovoltaic panels in Minas Gerais has caused dairy farmers to fear potential financial losses. In this study, grid-connected photovoltaic systems in dairy farms were evaluated, considering three fixed tilt angles for the panels (latitude - 10°, latitude, and latitude + 10°) and electrical energy demands of dairy activities associated with two herd sizes (100 and 150 cows). Meteorological databases and mathematical models were used to predict daily global radiation on tilted panels in dairy farms of two Brazilian municipalities of Minas Gerais State (Lavras and Paracatu). Energy consumption related to dairy activities was monitored for 12 months. For both municipalities, the best results were verified with the tilt angle of panels equal to the local latitude - 10°. The municipality with the lowest latitude (Paracatu) showed higher electricity generation potential. In all simulated scenarios, a greater energy surplus was found from late spring to early autumn (Southern Hemisphere), when the higher electricity generation by the photovoltaic panels met the elevated electrical energy demand of the dairy farms. A high energy surplus was also verified during midwinter, where lower energy consumption by the dairy farms compensated for the reduced availability of solar radiation. The proposed methodology can be adapted to other dairy farms, agricultural and urban buildings.

The Role of Renewable Energy Policy and R&D in Renewables Diffusion

This paper explores how investments in research and development (R&D) and government policies impact the growth of renewable energy in Brazil, Chile, and Colombia up to 2040. The study presents four scenarios to understand how different levels of R&D investment and the presence or absence of supportive policies affect the spread of renewable technologies such as solar and wind energy. The scenarios range from an optimistic one with high R&D funding and strong policy support to a worst-case scenario with low R&D efforts and weak policies. The findings emphasize the importance of solid government backing and strategic R&D investments in promoting renewable energy and increasing the number of green patents. On the other hand, scenarios with limited policy support and R&D funding show much slower growth, highlighting the challenges posed by economic constraints and tough market conditions. The study shows that strong renewable energy policies could boost renewable energy adoption by 100% to 200%. Overall, this research adds to the discussion on sustainable energy policies and provides useful insights for policymakers and stakeholders to develop strategies that maximize the potential of renewable energy in the region.

Technical and Economica Feasibility of Photovoltaic Tiles Applies to a Single-Family Residence in Belo Horizonte-MG

Objective: The objective of this study is to verify whether photovoltaic tile technology presents technical and economic feasibility to be implemented in a single-family residence located in Belo Horizonte-MG. Theoretical framework: Through the photoelectric effect, photovoltaic tiles directly convert solar energy into electrical energy in a static, silent, non-polluting and renewable way. In this system, photons, energy-carrying particles present in sunlight, fall on a surface composed of photovoltaic cells (made of semiconductor material). At the ends of the semiconductor material, an electrical potential difference appears, responsible for setting the electrons in the structure in motion, producing electric current. Methodology: The methodology adopted for this research consists of simulating the energy consumption of a 77m2 residential building, consisting of 3 members. The tile and photovoltaic panel systems were designed to meet the energy demands of this building. Results and discussion: The results indicated that both systems present technical feasibility for their implementation, since the technologies demonstrated that they are capable of satisfying 100% of energy needs. However, from an economic point of view, only photovoltaic modules were viable. Originality/value: This work makes a contribution to the literature by analyzing a technology that is still little known in the energy market. Implications of the research: The relevance and value of this research are evidenced by the fact that photovoltaic tiles are a sustainable alternative to generate clean energy and reduce greenhouse gas emissions, which can contribute to the diversification of the Brazilian energy matrix and mitigation of impacts. of civil construction.

Combustion and energy performance of non-commercial Corymbia and Eucalyptus wood for use in cogeneration systems in Brazil

The increased representation of biomass in the Brazilian energy matrix will contribute to reducing dependence on hydroenergy and mitigating negative impacts during increasingly frequent drought periods. However, given the changing climate, it is urgent to classify and select new genotypes for the expansion of energy plantations. The objective of this study was to evaluate the energy performance and combustibility of wood from Eucalyptus and Corymbia trees to support a knowledge-based and efficient use of such woods in thermochemical conversion systems. Eight species of Eucalyptus (Eucalyptus amplifolia, E. longirostrata, E. major, and E. urophylla) and Corymbia (Corymbia citriodora, C. variegata, C. henryi, C. torelliana), which are not generally used for energy purposes, were selected at 6 years of age from experimental plantations in southeastern Brazil. Wood basic density (WBD), ash content (AC), higher heating value (HHV), fuel value index (FVI), ignition (Di), flammability (Ci) and combustion (Si) indexes were determined. The wood of E. urophylla and C. torelliana presented showed the highest and lowest FVI, respectively. Regarding combustion indexes E. longirostrata had a higher combustion index (4.00 ×107 %2/(min2°C3)), flammability (1.49 %min−1/°C2) and ignition (4.39 % min−3) while C. variegata presented the lowest values. The FVI showed correlations with the combustibility of wood. Thus, this index can be used for the rapid and reliable classification of new genetic materials for energy forests in Brazil. E. urophylla and E. longirostrata woods demonstrated better energy performance and combustion indexes, making them the most suitable species for use in cogeneration systems and candidates for the expansion of energetic forests in Brazil.

Photovoltaic solar energy in Brazil: a review

Brazil has a high energy potential taking into account the region with the lowest solar radiation index in our territory, located in the state of Santa Catarina, it is observed that it is higher than several other regions in the world, especially in comparison with countries that stand out in implementation and investment of the sector. The present study aims to present a brief analysis of the concept of photovoltaic solar energy generation, providing a history of implementation in our country, also presenting a current panorama, government incentives through energy policy and future perspectives. It was not intended to carry out a case study for the implementation of a system, nor to present statistical comparisons with other nations.

Empowering Brazil's Energy Cooperatives: Creating a Federation and Fostering SDGs

Objective: This study examines the potential of establishing an energy cooperative federation in Brazil. Initially, challenges faced by cooperatives are identified, such as cultural resistance, lack of understanding about distributed generation, and financial difficulties. Theoretical Framework: Accelerating the global energy transition is necessary due to the effects of climate change, which presents a challenge for governments as they must balance conflicting agendas. Energy cooperatives have the potential to promote renewable energies and sustainable urban development and are increasingly growing in Brazil. By promoting unity, knowledge sharing, and collective advocacy, the federation can enhance the cooperatives' efficiency, influence, and resilience. This initiative aligns with multiple Sustainable Development Goals (SDGs). Method: Online interviews with management teams of Brazilian energy cooperatives and relevant organizations were conducted in 2023 to gather data on the sector's opportunities, challenges, and barriers. Data triangulation with literature provided a comprehensive view, leading to an analysis of key issues and a proposal to strengthen the sector.Results and Discussion: The main difficulties and solutions include: imbalances in relationships with utilities (discussion of legislation and regulation), disputes over taxation (revision of fees), difficulty obtaining resources (facilitated access to financing), high bureaucracy (simplification of processes), and public unfamiliarity (educational programs). Originality/Value: The proposed federation could act as a transformative force, promoting positive changes and shaping a more sustainable and democratic energy landscape in Brazil. Through robust governance structures, transparent practices, and active member engagement, this federation can catalyze innovation, promote equitable access to renewable energy, foster inclusive economic development, and position cooperatives as critical players in achieving sustainable development goals.

Evaluation of energy forecasting mechanisms with renewable sources for maximizing the brazilian energy matrix using machine learning

O presente estudo concentra-se no cenário energético brasileiro e destaca o aumento progressivo do uso de fontes renováveis na matriz de energia elétrica do país. O principal objetivo deste trabalho é contribuir para a busca de soluções e impulsionar debates e reflexões sobre as ações futuras necessárias para o planejamento energético. Para isso, a pesquisa emprega ferramentas computacionais baseadas em machine learning e mineração de dados, utilizando fontes de dados governamentais e de mercado de energia. A metodologia abrange a utilização de ferramentas computacionais para projetar a previsão do mercado de energia elétrica no país, inclui a execução de modelos de previsão, destacando o comportamento do mercado energético ao longo do tempo, a partir dos métodos Redes Neurais Multilayer Perceptron (MLP), Regressão do Processo Gaussiano (GPR) e Regressão Linear para projetar a geração elétrica por fonte no Brasil. Os resultados indicam um crescimento considerável das fontes renováveis no mercado energético nacional até o ano de 2030, aproximando-se do objetivo do Plano Decenal de Expansão de Energia de atingir 90% de renovabilidade, abrangendo fontes como hidrelétrica, biomassa, eólica e solar. O método de Regressão Linear alcançou 86% de renovabilidade, enquanto o método de GPR atingiu 90%, e o método das MLP chegou a 88%. A projeção da previsão do mercado de energia elétrica, possibilitou a identificação dos padrões de comportamento mercadológico, permitindo antecipar as tendências e mudanças no mercado. Essas previsões têm o propósito de fornecer informações para apoiar o desenvolvimento de ações no processo de planejamento energético, contribuindo para a transição para fontes mais sustentáveis e renováveis de energia no Brasil.

An overview on Brazilian Energy Market

Abstract Brazil is a major player in the global energy market, with the seventh largest electricity generation capacity in the world. The country's energy sector is characterized by a strong reliance on hydropower, but there is also a growing trend towards renewable energy sources such as wind and solar power. This article makes a general overview on Brazilian energy market, focusing on legal framework, regulatory authorities and transport and distribution system both on electricity and oil and gas sectors. It is also presented the today market situation. Finally, the article concentrates on energy produced from renewable sources and make a parallel on renewable energy market comparing the situation in Brazil, India and China.

ENERGY COOPERATIVES IN BRAZIL AS AGENTS OF ENERGY TRANSITION AND REGIONAL DEVELOPMENT

Energy plays a fundamental role in modern society. Accelerating the global energy transition is necessary due to the effects of climate change, which is a challenge for governments that must balance conflicting agendas. Energy cooperatives have the potential to promote renewable energies and sustainable cities and have been growing in Brazil. This research investigates the possibility that Brazilian energy cooperatives may present for energy transition and regional development. Interviews reveal that cooperatives are motivated by environmental concerns, solidarity economy, and access to solar energy for low-income communities. Regarding the energy transition, they promote energy democratization, cost reduction, and regional development. However, they face significant challenges such as cultural resistance, lack of understanding, bureaucracy, obtaining financial resources, ambiguous regulation, and the influence of economic power. The research fills a gap in the Brazilian context, providing theoretical and practical information that can be applied to improve the renewable energy sector and enhance its environmental, economic, and social benefits.

Methodology for Multi-Step Forecasting of Electricity Spot Prices Based on Neural Networks Applied to the Brazilian Energy Market

Forecasting electricity spot prices holds paramount significance for informed decision-making among energy market stakeholders. This study introduces a methodology utilizing a multilayer perceptron (MLP) neural network for multivariate electricity spot price prediction. The model underwent a feature selection process to identify the most influential predictors. In the validation phase, the model’s performance was evaluated using key metrics, including trend accuracy percentage index (TAPI), normalized root mean squared error (NRMSE), and mean absolute percentage error (MAPE). The results were obtained for a four-week forecast horizon in order to serve as an auxiliary tool to facilitate decision-making processes in the short-term energy market. The relevance of short-term electricity spot price forecasting lies in its direct impact on pricing strategies during energy contract negotiations, which allows for the making of assertive decisions in the energy trading landscape.

Seasonal pumped hydropower storage role in responding to climate change impacts on the Brazilian electrical sector

Since Brazil's major energy resources are renewable and directly related to climate factors, it is among the countries most likely of being affected by climate change. Given Brazil's high hydropower storage capacity and the strong seasonal patterns of its renewable resources, introducing Seasonal Pumped Hydropower Storage (SPHS) can help mitigate these challenges. To this end, a methodology is proposed that links the dynamic system-optimization model – MESSAGEix - to regional climate model simulations, called the Brazilian Electricity System MESSAGEix Model (BESMM). This model, with its detailed hydropower representation, is capable of integrating data from three climate change scenarios with the country's energy system. Climate change introduces a new dimension to this approach, as there is evidence of increasing the seasonal imbalance of variable renewable resources in Brazil. BESMM results suggest that SPHS can play a fundamental role in achieving a 100 % renewable matrix by 2100 in RCP 2.6 scenario, as well as enhancing the renewable energy endowment in scenarios RCP 4.5 and RCP 8.5. A reduction of up to 68 % of CO2 emissions is predicted in scenarios incorporating SPHS, compared to scenarios without SPHS.

Renewable Energy Potentials and Roadmap in Brazil, Austria, and Germany

The emerging energy transition is particularly described as a move towards a cleaner, lower-carbon system. In the context of the global shift towards sustainable energy sources, this paper reviews the potential and roadmap for hydrogen energy as a crucial component of the clean energy landscape. The primary objective is to present a comprehensive literature overview, illuminating key themes, trends, and research gaps in the scientific discourse concerning hydrogen production and energy policy. This review focuses particularly on specified geographic contexts, with an emphasis on understanding the unique energy policies related to renewable energy in Brazil, Austria, and Germany. Given their distinct social systems and developmental stages, this paper aims to delineate the nuanced approaches these countries adopt in their pursuit of renewable energy and the integration of hydrogen within their energy frameworks. Brazil exhibits vast renewable energy potential, particularly in wind and solar energy sectors, positioning itself for substantial growth in the coming years. Germany showcases a regulatory framework that promotes innovation and technological expansion, reflecting its highly developed social system and commitment to transitioning away from fossil fuels. Austria demonstrates dedication to decarbonization, particularly through the exploration of biomethane for residential heating and cooling.

Assessing the economic viability of BESS in distributed PV generation on public buildings in Brazil: A 2030 outlook

This paper proposes a method to assess the financial attractiveness provided by adding a Battery Energy Storage System (BESS) in distributed photovoltaic (PV) generation on public buildings in Brazil. The method is applicable to prosumer units (PU) connected on the medium voltage grid operating under time-based electricity tariffs. The BESS primary objective was to achieve optimal reductions in electric energy expenses through effective energy arbitrage mechanisms. The procedural steps of the methodology begin with an analysis encompassing assessment of solar resource, PU consumption profile, and BESS sizing and operation. Subsequently, steps entail contracted power optimization, PU net-metering analysis, and evaluation of BESS impacts on electric energy expenses. Lastly, a regulatory and economic analysis is conducted incorporation considerations on BESS taxation, behind-the-meter regulations, and a sensitivity assessment extending to the 2030 outlook. By 2050, it is anticipated that PV generation will surpass hydropower, becoming the predominant component of Brazil's energy mix. This shift is expected to create an increased need for solutions, notably storage systems, capable of meeting flexibility requirements and maintaining grid resilience. The results suggest that the financial viability of incorporating BESS becomes favourable when the battery cost is below 365 $/kWh. In approximately 50% of the Brazilian territory, prevailing economic conditions support the adoption of BESS. Nationwide feasibility of integration is anticipated for the year 2027. It was observed that government policies to exempt BESS taxation, even if temporary, would be extremely interesting to promote the widespread adoption of this technology. The 2030 outlook of the transition to these benign renewable energy technologies is already in place, and will dominate the energy mix.

The Role of The State in Diversifying and Expanding the Brazilian Energy Matrix: an Analysis of Legislation

Despite having an essentially renewable electricity matrix, the dependence on hydropower, in the current climate risk scenario and the associated environmental and social impacts, point to the need to diversify energy generation in Brazil. To this end, state action is fundamental for designing and implementing public policies for the country's energy matrix. However, this diversification does not occur at the desired speed and scale. Thus, this article analyses the Brazilian regulatory environmental policies to assess the participation of the Federal constituencies, States, and municipalities in scaling renewable sources in the national electricity matrix. The research revealed that specific legislation on energy is scarce, and much of what is applied is taken from the general environmental legislation. We noticed that, by constitutional imposition, the Federal constituencies have the legislative competence on the theme and, therefore, establish norms and general rules, while States and municipalities act marginally, especially in fiscal matters and environmental licensing. The need for more objectivity, standardization, and the non-existence of specific technical criteria in the norms about energy use. We also verified that most of what was legally established constitutes government programs, not state policies. It is necessary to extend the participation of states and Municipalities in elaborating national energy use plans and in the revision and technical standardization of the licensing norms. These gaps must be filled so sustainable development, a principle established in the Constitution, is strengthened and made possible, with the participation of States and Municipalities.

Assets of foreignness in a regulated industry

Purpose Foreign subsidiaries incur substantial institutional conformity costs because they have to respond to host-country institutional pressures (Slangen & Hennart, 2008). The purpose of this paper is to study this type of cost from institutional and regulatory perspectives. The authors argue that these costs decrease when the host country adopts concepts of international regulations that multinationals may be familiar with due to their own home country regulation experience. This prior regulatory experience gives foreign subsidiaries an advantage of foreignness (AoF), which can offset their liability of foreignness (LoF). Design/methodology/approach This study compared the returns on assets of 35 domestic firms with those of foreign subsidiaries in the Brazilian energy industry between 2002 and 2021, using regression dynamic panel data. Findings The existence of a relationship between the international regulatory norm and the Brazilian regulator has transformed the LoF into an advantage of foreignness to compete with local energy firms. The results also suggest that the better the regulatory quality of the subsidiary’s country of origin, the better its performance in Brazil, as it can reduce compliance costs. Finally, the greater the psychic distance between Brazil and the foreign subsidiary’s home country, the worse its performance. Research limitations/implications The research suggests that one of the keys to competitiveness in host countries is local regulatory ties. Prior international regulatory experience gives foreign subsidiaries an asset of foreignness (AoF). This result complements the current institutional and regulatory foreignness studies on emerging economies (Cuervo-Cazurra & Genc, 2008; Mallon et al., 2022) and the institutional asymmetry between home and host country (Mallon & Fainshmidt, 2017). Practical implications This research suggests that one of the keys to competitiveness in host countries is local regulatory ties. Prior international regulatory experience gives foreign subsidiaries an asset of foreignness (AoF). This result complements the current institutional and regulatory foreignness studies on emerging economies (Cuervo-Cazurra & Genc, 2008; Mallon et al., 2022) and the institutional asymmetry between home and host country (Mallon & Fainshmidt, 2017). The practical implication is that the relationship between conformity costs, capital budget calculation and strategic planning for internationalization will be related to the governance quality of the home country of multinationals. The social implication is that a country interested in attracting more direct foreign investment to areas that need foreign technology transfer and resources may consider adopting international regulatory standards. Social implications The social implication is that a country interested in attracting more direct foreign investment to areas that need foreign technology transfer and resources may consider adopting international regulatory standards. Originality/value This research discuss firm and local regulator tie is one of core competitiveness in host countries (Yang and Meyer, 2020). This study also complements the current institutional and regulatory foreignness studies in emerging economy (Cuervo-Cazurra & Genc, 2008; Mallon et al., 2022). Second, prior regulatory experience of multinational enterprise in similar environment can affect its foreign affiliate performance (Perkins, 2014). Third, this study confirms current literature that argues that knowledge and ability to operate in an institutionalized country can be transferred from parent to affiliate. In the end, this study investigates whether AoF persists when host governments improve the governance of their industries.

Biofuels and energy transition policy in Brazil: contributions, limits and possibilities given the need for climate justice in the Capitalocene

The article aims to discuss about the climate change has imposed a new agenda in the scope of international relations, bringing to regulation the need for reconciliation between different fields of knowledge, such as law, study of energy, issues of an economic, political and social nature, with multiple interests, agendas, demands that need to be modulated, not in favor of immediate interests, but of future generations. In this way, based on the concepts of climate justice and energy transition, the work seeks to analyze the role of biofuels within the Brazilian energy transition strategy. It was presented how the Capitalocene is responsible for an unprecedented crisis that threatens the existence of life on the planet. It was highlighted that technologies need to be more than sustainable, as it is no longer enough to be renewable, they also need to have low CO2 emissions, to be able to break the catastrophic future that lies ahead. In this context, Brazilian biofuels such as ethanol and biodiesel stand out in comparison to the array of electric engines in the reorganization of the fleet of light and cargo vehicles, in the definition of transition policy.

Impact of Corrective Switching in Wind Farms Operation

Eventually, limits violations of bus voltages or of admissible loadings of transmission lines and/or power transformers may occur by the power system operation. If violations are detected, corrective measures may be carried out aiming their elimination or to reduce their intensity. Loading shedding is an extreme solution and should only be adopted as the last control action. The control tool adopted in this work is Corrective Switching. It controls power flows in electrical networks by changing their topologies, without requiring any additional cost. Due to the large potential of wind energy in Brazil, using the technique of Corrective Switching may result in disconnection of wind farms, whose machines are not equipped with Low Voltage Ride Through function, since its wind generators are turned off when submitted to voltage sags for a short time. Thus, this works aims to verify if Corrective Switching actions, that could eliminate operational violations in electrical energy systems, can cause disconnections of wind farms, contributing to degrade power quality.