Optimizing of the installed capacity of hybrid renewable energy with a modified MPPT model

The lack of wind speed capacity and the emission of photons from sunlight are the problem in a hybrid system of photovoltaic (PV) panels and wind turbines. To overcome this shortcoming, the incremental conductance (IC) algorithm is applied that could control the converter work cycle and the switching of the buck boost therefore maximum efficiency of maximum power point tracking (MPPT) is reached. The operation of the PV-wind hybrid system, consisting of a 100 W PV array device and a 400 W wind subsystem, 12 V/100 Ah battery energy storage and LED, the PV-wind system requires a hybrid controller for battery charging and usage and load lamp and it’s conducted in experimental setup. The experimental has shown that an average increase in power generated was 38.8% compared to a single system of PV panels or a single wind turbine sub-system. Therefore, the potential opportunities for increasing power production in the tropics wheather could be carried out and applied with this model.

Critical Assessment of Feed-In Tariffs and Solar Photovoltaic Development in Vietnam

Vietnam became the world’s third largest market for solar photovoltaic energy in 2020. Especially after the Vietnamese government issued feed-in tariffs for grid-connected solar photovoltaic systems, the installed capacity of solar photovoltaic applications exploded in 2019. From studies carried out in the relevant literature, it can be said that support policies are highly important for the initial development of the renewable energy industry in most countries. This is especially true in emerging countries such as Vietnam. This paper reviews the feed-in tariffs issued and deployed in different regions of Vietnam for grid-connected solar photovoltaic applications. Moreover, the paper takes a closer look at the costs of electricity production from these systems in relation to the feed-in tariffs issued in Vietnam. The results show that the gap between the levelized cost of electricity and the feed-in tariff for solar photovoltaic electricity is relatively high, particularly in regions with a lower irradiation potential.

Research on the construction of carbon emission model of power generation industry in Jilin province

Although Jilin Province has abundant forest reserves and has a relatively large carbon neutral advantage compared to other provinces, the installed capacity of thermal power is still relatively high, and the installed capacity of renewable energy such as wind power, photovoltaic and hydropower is insufficient. This paper builds a carbon emission model for the power generation industry in Jilin Province based on the characteristics of the power generation industry in Jilin Province and years of field test experience.

Comparison of Support Programs for the Development of Photovoltaics in Poland: My Electricity Program and the RES Auction System

Poland has great potential for the development of renewable energy sources. The implementation of support systems dedicated to renewable sources has resulted in the installation of over 10,500 MW of installed capacity. At present, with high electricity prices, stimulated by the costs of CO2 emissions and the costs of fuel purchase, renewable energy sources are of particular importance in the transformation of the Polish power industry. The RES auction system and the My Electricity Program contributed to the growth of entrepreneurship and the development of the economy. Energy consumers, from passive ones, have become active market participants—prosumers. The RES auction system alone contributed to the creation of approx. 5 GWp of installed capacity of photovoltaics (PV) sources in 2016–2021, while the My Electricity Program contributed to the creation of approx. 2 GWp of installed capacity in PV installations in 2019–2021. The aim of the study is to compare the economic and social costs of two photovoltaic development programs, My Electricity and the RES auction system, from the point of view of the country (in support distribution costs—subsidies) and investors, renewable energy installations operators and prosumers to which these programs are targeted, namely, individuals and enterprises.

Economic Feasibility of Agricultural Biogas Production by Farms in Ukraine

Renewable energy generation in Ukraine is developing slower than state strategies and expectations, with the installations for energy generation based on biogas currently being among the lowest in terms of installed capacity. Most of those involved in energy generation from agricultural biogas are large enterprises, while the small and medium-sized farms are far less involved. Thus the article aims to assess the economic feasibility of biogas production from agricultural waste by specific farm types and sizes, with a special focus on small and medium-sized farms. The research results present findings in two dimensions, first defining the economic feasibility of biogas installations in Ukraine based on investment costs and the rate of return at both the current and potential feed-in tariff, and second, analyzing the influence of state regulation and support on the economic feasibility of agricultural biogas production in Ukraine. The results emphasize that the construction of small generation capacities does not provide sufficient funds under the current feed-in tariff to meet the simple return period expected by the domestic financing institutions. Except for the general support programs for agricultural activities, there are no support funds specifically for biogas producers, while there is tight competition with wind and solar energy due to diversified feed-in tariffs.

Precios de Garantía en México (2019-2020): diseño e implementación de política agrícola

The producers' response to the Guarantee Price Program was analyzed through three complementary approaches: design, results, and producers´ perception. The study shows a deficient design from the construction of the problem tree and the Matrix of Indicators for Results; a low participation of producers, reflected in an idle installed capacity of 69% of the collection centers; and disinterest of the beneficiaries due to causes attributable to the program, such as the distance from the collection centers. This work contributes to the recognition of the initial problems of the policy, and thus to advance in their solution.

Carbon Emissions and Renewables’ Share in the Future Iberian Power System

The main objective of this study is to assess if the targets set by the European Commission (EC) relating to the share of renewables and CO2 emissions by 2030 will be accomplished by the Iberian power system. In this regard, several projections for each generation technology’s installed capacity in the future power system are identified. These forecasts were issued by governmental and private Iberian organizations and by the European Association of Transmission System Operators (ENTSOE), the latter with three scenarios regarding the speed of the energy transition. The outputs of the study are extended to the 2040 horizon and include the energy generated by each technology, the CO2 emissions, the costs involved in the decarbonization, and the storage capacity needed to compensate for the renewables’ variability. The conclusion is that the Iberia peninsular is on the right path to achieve a fully decarbonized power system by 2040, outperforming by far the EC’s targets in 2030 if the governmental projections are followed. A significant capacity of storage options is envisaged to compensate for the variability of generation from renewables and to replace the power regulation services provided by the fossil fuel plants that will be shut down.

Impact of the introduction of chikungunya and zika viruses on the incidence of dengue in endemic zones of Mexico

Background With the arrival of chikungunya (CHIKV) and zika (ZIKV) viruses in Mexico, there was a decrease in diagnosed dengue virus (DENV) cases. During the first years of cocirculation (2015–2017), the algorithms established by epidemiological surveillance systems and the installed capacity limited us to one diagnostic test per sample, so there was an underestimation of cases until September 2017, when a multiplex algorithm was implemented. Therefore, the objective of this study was determine the impact of the introduction of CHIKV and ZIKV on the incidence of diagnosed DENV in endemic areas of Mexico, when performing the rediagnosis, using the multiplex algorithm, in samples from the first three years of co-circulation of these arboviruses. Methodology and principal findings For this, 1038 samples received by the Central Laboratory of Epidemiology between 2015 and 2017 were selected for this work. Viruses were identified by multiplex RT-qPCR, and the χ2 test was used to compare categorical variables. With the new multiplex algorithm, we identified 2.4 times the rate of arbovirosis as originally reported, evidencing an underestimation of the incidence of the three viruses. Even so, significantly less dengue was observed than in previous years. The high incidence rates of chikungunya and Zika coincided with periods of dengue decline. The endemic channel showed that the cases caused by DENV rose again after the circulation of CHIKV and ZIKV decreased. In addition, 23 cases of coinfection were identified, with combinations between all viruses. Conclusions and significance The results obtained in this study show for the first time the real impact on the detected incidence of dengue after the introduction of CHIKV and ZIKV in Mexico, the degree of underestimation of these arboviruses in the country, as well as the co-infections between these viruses, whose importance clinical and epidemiological are still unknown.

Role of Renewable Energy in India’s Energy Basket

World is witnessing a trend of countries adopting renewable energy sources viz.a.viz. Fossil fuels dominated energy sources. International Energy Agency believes that by 2025 energy produced from Renewable energy sources will most likely surpass electricity generated by coal. India being one of the largest producer and consumer of electricity in the world is already one of the largest producers of energy from renewable sources in the world with 38%+ of India’s total installed capacity from renewable energy sources. In this study we analyze and review the role that Renewable Energy is going to play in India’s Energy basket. With growing dependence on non-fossil fuels, it’s imperative for industry participants, policy makers, governments and researchers to decipher what is the role that is going to be played by energy produced from renewable energy sources in India’s energy basket from a strategic as well as policy making perspective.

Indonesia’s Road to Fulfill National Renewable Energy Plan Target in 2025 and 2050: Current Progress, Challenges, and Management Recommendations – A Small Review

Indonesia has a large amount of energy consumption, domestically and industrially. Indonesia’s energy mix is still dominated by fossil fuels and coals, with the percentage of 35.64% and 50% respectively in 2020. This is caused by Indonesia’s rich supply of oil and coal, even though experts have predicted that these supplies will run out in 10 years ahead. One option to preserve Indonesia’s energy security is to start using renewable energy. Indonesia’s renewable energy potential is predicted to be around 443 GW of installed capacity, and already made renewable energy mix percentage target of 23% in 2025 and 31% in 2050 in their National Energy Plan. However, Indonesia’s renewable energy percentage in their 2020 national energy mix is only 14.71%. Therefore, to reach their national renewable energy target, Indonesia needs to solve their problems by finding the right actions and strategies in their energy management through stakeholders such as the government, public, and investors. This review will be made by using the literature based research method.